Types of Glasses : 1. Soda lime Glass: (Soda glass or Normal Glass or Soft Glass)
|
|
- Jemimah Walters
- 5 years ago
- Views:
Transcription
1 Introduction: Phosphate glasses and glass ceramics are useful for applications such as bone transplantation, glass to metal seals, containment of radioactive wastes, fast ion conductors, laser host materials etc. They have a comparatively high transmission in the ultraviolet region compared to silicate and borate glasses. They also have low glass transition and melting temperatures compared to silicate glasses. The network structure of simple phosphate glass consists of P tetrahedra linked to neighboring tetrahedral through bridging oxygen (BOs). Addition of Al +3 B Bi etc has been found to improve the chemical durability because of the formation and relative stability of M +3 O P bond. These ions modify various physical properties including thermo mechanical and optical behaviour basically due to change in glass structural network through formation of cross linked bonds. Borophosphate glasses having improved durability are among the multi component glasses studied for various interesting applications. Alkali and silver borophosphate glasses have been developed for fast ion conducting applications. Zinc calcium borophosphate glasses were studied as candidates for applications as low-melting glass solders glass to metal seals. The structure of borophosphate glasses was studied by NMR spectroscopy and it was found that both BO 3 and BO 4 structural units were present in the glass structure. The fraction of BO 4 units in the glasses was also found out in this study, which is an important parameter in the context of improvement of durability of these glasses. The presence of BO 3 and BO 4 structural units affects the chemical bonding with the phosphate tetrahedra, which becomes important in determining the chemical durability of these glasses. The corrosion studies on alkali alkaline earth phosphate glasses revealed that corrosion resistance of these glasses to water attack was improved by small addition of Al 2 O 3 and glasses with thermal expansion coefficients (TEC) greater than C and glass transition temperatures Tg below 400 C and melting points below 600 C which could be thermetically sealed to aluminium alloys. Sodium borophosphate glass studies show an increase in Tg and decrease in TEC for y = B / (B + P) = (B = B 2 O 3 content in mol% P = P 2 O 5 content in mol %) where BO 4 units dominate over BO 3 units. The maximum TEC reported for sodium borophosphate glasses is for y < 0 5. Therefore it seems interesting to study the effect of B 2 O 3 addition in sodium barium phosphate glass since the addition of boron oxide tends to improve the durability of sodium phosphate glass without any major change in the TEC of these glasses. In this work we report the degradation behavior of sodium barium borophosphate glasses in water acid and
2 alkali media at room temperature and at 60 C. To the best of our knowledge this data is new for phosphate glasses and the structural and physico-mechanical properties for these glasses are reported elsewhere. We have prepared a vacuum seal using glass composition x = 10 mol% with Al metal withstanding 10 6 Torr pressure and also carried out glass to metal interface study. (1) The relation between the resulting structure and property is outmost importance in the design of the desired glass. In view of this, currently research has been focused on low melting glasses. In the present work we have selected a binary,ternary borophosphate glass containing alkali and alkaline earth metal oxides to investigate the chemical durability optical and electrical studies. Now a day attention is being drowned to investigate glasses as useful solid materials, especially those containing alkali oxide, alkaline earth oxide, and transition metal cations. Early on boron was identified as an important glass former which can be used in the preparation of glasses for both scientific and technological applications. The presence of glasses in our everyday environment is so common that we rarely notice their existence. Our current casual attitude toward the family of materials known as glasses has not always existed. The earliest glasses used by man were found in nature. The ease of formation of sharp edges on obsidians, for example, allowed the production of knives, arrow heads, and other cutting tools. These naturally occurring glasses, which result from the cooling of molten rock, or lava, contain a wide variety of components, including alkali, alkaline earths and transition metal oxides. In every case however silica is found to be the major constituent of these materials. (2) Types of Glasses : Depending on the network former used, glasses can be classified as silicate, borosilicate, alumina silicate, borate, phosphate glasses, chalcogenide glasses etc. and depending on its end used as optical glasses, sealing glasses, special application glasses etc. Large varieties of glass are obtained by varying the composition of the batch. Based on the composition the different types of glasses have been discussed as follows. 1. Soda lime Glass: (Soda glass or Normal Glass or Soft Glass)
3 Soda lime or lime glasses are made by fusing together appropriate quantities of sand, lime or lime stone and soda ash 2 Phosphate Glasses: There is relatively poor chemical durability, which often limits their usefulness in various applications (3). Durability can be improved by the addition of Bi 2 O 3,Al 2 O 3, Fe 2 O 3 etc. (4) These types of glasses have considerable potential applications. (5) These glasses have wide technological interest due to their unique physical properties such as low glass transition temperature (T g ), lower melting temperature, high thermal expansion coefficient high ionic conductivity & bio compatibility. (6) 3 Borosilicate Glasses: The glass is used in the manufacture of kitchenware, glass pipelines in factories, high tension insulators; it is mainly used as heat resisting ware like oven ware and laboratory glass ware. (7) The special types of glass called Pyrex, Jena, corning etc. are manufactured from borosilicate glass. It is widely used in laser technology. (8) 4 Alumino silicate glasses: When part of the silica in glass composition is replaced by Alumina (Al 2 O 3 ), Aluminosilicate glass gets formed (9) Aluminosilicate glasses are used commercially because they are chemically stable and withstand at high temperatures. Thus applications include combustion tubes, gauge glasses for high-pressure steam boilers and in halogentungsten lamps capable of operating at temperature as high as 750 o C. (10) Tungsten ions are well known due to their unusual influence on the optical and electro chemical properties of the glasses for the simple reason that the oxides of tungsten participate in the glass network. (11) 5 Telluride Glasses: Telluride glasses were first prepared and studied by Starwort in 1952 (12). The important properties of these glasses are refractive index up to 2.3 and high thermal
4 expansion coefficient ~ C, TeO 2 based glasses have also been used in preparation of transparent glass ceramics. Most of the telluride glasses have got good stability under ambient conditions. 6 Van date Glasses: Pure V 2 O 5 melts at around C and forms glass only when it is cooled rapidly. Glass formation between V 2 O 5 and a number of oxides like P 2 O 5, TeO 2, B 2 O 3, GeO 2, BaO, ZnO, CdO, MgO etc. has been investigated by various authors and the regions of glass formation and the quenching rate required for the glass formation have been reported. (13) 7. Chalcogenide glasses: Amorphous chalcogenide materials can be prepared by a variety of methods. Some methods for forming glasses are Slow cooling (melt quenching), moderate quenching, rapid quenching or splat cooling, roller quenching or melt spinning, laser glazing, condensation from the gas phase, sol-gel method. (14) Melt quench technique is used to make this type of glasses. (15) B 2 O 3 is also used as a glass former. The effects of B 2 O 3 addition in the properties and structures of two series of Sn (II)-borophosphate glasses were determined. (16) The refractive index of the series I glasses decreases slightly, from to 1.725, and increases for series II, to 1.834, at nm. Raman spectroscopy reveals that borate additions to both series reduce the number of P-O-P linkages by converting pyrophosphate anions to orthophosphate anions. 11B NMR spectra indicate that tetrahedra Phosphate glass is a class of optical glasses composed of metaphosphate of various metals. Instead of Sio 2 in the slicate glass, the glass forming substrate is P 2 O 5 borophosphate units, B(OP) 4, are initially formed when B 2 O 3 is added to the Sn-pyrophosphate base glass. More complex tetrahedral and trigonal borate sites form when B 2 O 3 contents exceed about 10 mol %. ( 17) P 2 O 5 crystallizes in at least four forms. The most familiar polymorph (see fig.no.1) comprises molecules of P 4 O 10. The other polymorphs are polymeric, but in each case the phosphorus atoms are bound by a tetrahedron of oxygen atoms, one of which forms a
5 terminal P=O bond. The O-form adopts a layered structure consisting of interconnected P 6 O 6 rings, not unlike the structure adopted by certain polysilicates. (18) Fig.no.1 glass formers. The P 4 O 10 cage like structure which provides the basic building block for phosphate Phosphate glasses are highly resistant to hydrofluoric acid. With addition of iron oxide, they act as efficient heat absorbers. Iron phosphate and lead iron phosphate glass are alternatives to borosilicate glass for immobilization of radioactive waste. (19) Phosphate glasses can be advantageous over silica glasses for optical fibers with high concentration of doping rare earth ions (20-21) a mix of fluoride glass and phosphate glass is glass. Silver-containing phosphate glass is used in phosphate glass dosimeter. It emits fluorescent light when irradiated by ultraviolet light, when previously exposed to ionizing a radiation in an amount proportional to the close. Some phosphate glasses are bio-compatible and water-soluble and are suited for use as degradable tissue and bone scaffolds within the human body. (22) As B 2 O 3 content in the glass increases, the Meta phosphate chains are converted into orthophosphate structural units with the formation of P OH and Na + -OH bonds, which are relatively weak in nature, resulting in increase in the dissolution rate. B 2 O 3
6 reacts with water and forms boric acid, which readily dissolves in water. It is also observed that with increase in B 2 O 3 content, BO 4 units are increased. BO 4 structural units exist as BO 4 Na + units, which readily react with aqueous medium to form sodium borate, which is soluble in water or acidic medium. There by it increases the dissolution rate. Now our aim is to enhance the hardness of borophosphate glass by using different addiditives.
Surface degradation behaviour of sodium borophosphate glass in aqueous media: Some studies
Bull. Mater. Sci., Vol. 32, No. 3, June 2009, pp. 329 336. Indian Academy of Sciences. Surface degradation behaviour of sodium borophosphate glass in aqueous media: Some studies K V SHAH, M GOSWAMI, S
More informationMIT Amorphous Materials
MIT 3.071 Amorphous Materials 2: Classes of Amorphous Materials Juejun (JJ) Hu 1 Network formers, modifiers and intermediates Glass network formers Form the interconnected backbone glass network Glass
More informationMSE 352 Engineering Ceramics II
Kwame Nkrumah University of Science & Technology, Kumasi, Ghana MSE 352 Engineering Ceramics II 3 Credit Hours Ing. Anthony Andrews (PhD) Department of Materials Engineering Faculty of Mechanical and Chemical
More informationCeramic Engineering 103 Final Exam (5/17/01)
Test5_010517 (1) Name Ceramic Engineering 103 Final Exam (5/17/01) 1) Arrange each set of oxides in order from most basic to most acidic then write out the name of the resulting glass. (Example: a glass
More informationOverall Conclusions and Future Projections OVERALL CONCLUSIONS
OVERALL CONCLUSIONS This article brings the thesis to a close by presenting the conclusions drawn from the outcome of the radiation effects on the structural and optical properties of heavy metal oxide
More informationCHAPTER-2 HEAVY METAL OXIDE GLASSES CONTAINING BISMUTH AND LEAD
CHAPTER-2 HEAVY METAL OXIDE GLASSES CONTAINING BISMUTH AND LEAD There is an increasing interest in the scientific community regarding heavy metal oxide (HMO) glasses containing bismuth and lead oxide.
More informationDoris Ehrt and Doris Möncke. Friedrich Schiller University of Jena, Otto-Schott-Institut, Fraunhoferstr. 6, D Jena, Germany,
Charge transfer absorption of Fe 3+ and Fe + complexes and UV radiation induced defects in different glasses Doris Ehrt and Doris Möncke Friedrich Schiller University of Jena, Otto-Schott-Institut, Fraunhoferstr.
More informationMSE 352 Engineering Ceramics II
Kwame Nkrumah University of Science & Technology, Kumasi, Ghana MSE 352 Engineering Ceramics II Ing. Anthony Andrews (PhD) Department of Materials Engineering Faculty of Mechanical and Chemical Engineering
More informationVery high purity silicon required for making semiconductors is obtained by reduction of highly purified SiCl 4
1 Silicon and its compounds Silicon, being a second member of group 14, has a much larger size and lower electronegativity than hat of carbon As a result silicon does not form double bond with itself or
More informationOptical and Photonic Glasses. Lecture 2. Glass Types and Theories of Formation. Professor Rui Almeida
Optical and Photonic Glasses : Glass Types and Theories of Formation Professor Rui Almeida International Materials Institute For New Functionality in Glass Lehigh University In a multicomponent material
More informationOptical and Photonic Glasses. Lecture 4. Glass Composition and Preparations. Professor Rui Almeida
Optical and Photonic Glasses : Glass Composition and Preparations Professor Rui Almeida International Materials Institute For New Functionality in Glass Lehigh University For a given, selected value of
More informationThe Complete Book on Glass Technology
The Complete Book on Glass Technology Author: NPCS Board of Consultants & Engineers Format: Paperback ISBN: 8178330172 Code: NI205 Pages: 584 Price: Rs. 1,625.00 US$ 150.00 Publisher: Asia Pacific Business
More informationChemistry 145 Exam number 4 name 11/19/98 # Faraday s constant is 96,500 c/mole of electrons.
Chemistry 145 Exam number 4 name 11/19/98 # Faraday s constant is 96,500 c/mole of electrons. A.(16) An electrochemical cell is prepared with a strip of manganese metal dipping in to a 1.0 M MnSO 4 solution
More informationPROPERTIES OF MATERIALS PART HARDNESS
CHAPTER 3 PROPERTIES OF MATERIALS PART 2 30.07.2007 3.1.10 HARDNESS A Resistance to permanently indenting the surface Large hardness means resistance to plastic deformation or cracking In compression,
More information1. Temperature Dependences of Optical Path Length in Inorganic Glasses
Reports Res. Lab. Asahi Glass Co., Ltd., 1. Temperature Dependences of Optical Path Length in Inorganic Glasses Akio Koike* and Naoki Sugimoto* Temperature dependences of optical path length (ds/dt; calculated
More informationAP Chemistry A. Allan Chapter 18 - The Representative Elements: Groups 1A through 4A
AP Chemistry A. Allan Chapter 18 - The Representative Elements: Groups 1A through 4A 18.1 A Survey of the Representative Elements A. Basic Trends 1. Metals tend to lose electrons and form cations 2. Nonmetals
More informationFundamentals of. Inorganic Glasses. Arun K. Varshneya. New York State College of Ceramics Alfred University Alfred, NY
Fundamentals of Inorganic Glasses Arun K. Varshneya New York State College of Ceramics Alfred University Alfred, NY & Saxon Glass Technologies, Inc. Alfred, NY CONTENTS Preface to the first edition Preface
More informationNext to silicates, most technologically (and scientifically) interesting glasses.
Cer103 Notes Shelby Chapter 5 5-15 II. Structural Models for B 2 3 Next to silicates, most technologically (and scientifically) interesting glasses. B: 1s 2 2s 2 2p 1 B 3+ : 1s 2 sp 2 hybridization: planar
More informationHow To Break Quartz Combustion Tubes Scott Hughes, EA Consumables Ian Smith, Paul Stevens, Jon Davies, Elemental Microanalysis
How To Break Quartz Combustion Tubes Scott Hughes, EA Consumables Ian Smith, Paul Stevens, Jon Davies, Elemental Microanalysis Quick Answer: Use them in an Elemental Analyzer What is quartz? Second to
More informationMould fluxes for steelmaking - composition design and characterisation of properties. Research Institute, Stockholm
Mould fluxes for steelmaking - composition design and characterisation of properties Carl-Åke Däcker KIMAB, Corrosion and Metals Research Institute, Stockholm The main functions for mould powder - and
More informationSTRUCTURE-PROPERTY CORRELATIONS IN BISMUTH GLASSES
CHAPTER 4 STRUCTURE-PROPERTY CORRELATIONS IN BISMUTH GLASSES 4.1 Introduction Recently Bajaj et al. (2009a, 2009b, 2009c) reported very detailed density, optical, thermal, and structural and devitrification
More informationDocument of Thickness Monitor Glass. Piezo Parts Co., Ltd. Febrary 20 th, 2018
Document of Thickness Monitor Glass Piezo Parts Co., Ltd. Febrary 20 th, 2018 Glass Type Type Optical Glasses Optical glass has high transmittance character. It has also characteristic of high optical
More information9.2.1 Similarities and trends in the properties of the Group II metals magnesium to barium and their compounds
9.2 Group II Content 9.2.1 Similarities and trends in the properties of the Group II metals magnesium to barium and their compounds Learning Outcomes Candidates should be able to: (a) (b) (c) (d) describe
More information1. Scaling. H.O.: H-5/21, KRISHNA NAGAR, DELHI Tel.: , Fax:
Boiler Water Problems and Its Causes Water is the essential medium for steam generation. Conditioning it properly can increase the efficiency of boiler and as well as extend the boiler s life. Treating
More informationMETALS AND THEIR COMPOUNDS
METALS AND THEIR COMPOUNDS Metals are elements whose atoms ionize by electron loss, while non-metals are elements whose atoms ionize by electron gain. Metals are in groups 1, 2 and 3 of the periodic table.
More informationHaseeb Ullah Khan Jatoi Department of Chemical Engineering UET Lahore
Haseeb Ullah Khan Jatoi Department of Chemical Engineering UET Lahore Greek word Keramikos which means Burnt Stuff indicating that desired properties of these materials are normally achieved through a
More informationLecture 14: Rate of Nucleation
Lecture 14: Rate of Nucleation oday s topics wo energetic factors that affect nucleation rate: the activation energy barrier ( G) that needs to be overcome to produce a critical-size nucleus, and the activation
More informationTurn off all electronic devices
Knives and Steel 1 Knives and Steel Observations about Knives and Steel Knives and Steel 2 Some knives can t keep their cutting edges Some knives bend while others break Making good knives involves heat
More informationGeopolymers. Chemistry of Geopolymers of the Institute of Rock Structure and Mechanics Academy of Sciences of the Czech Republic
Geopolymers Chemistry of Geopolymers of the Institute of Rock Structure and Mechanics Academy of Sciences of the Czech Republic What are they? 1. Geopolymers are inorganic polymers based on specific properties
More informationThe table shows the students suggestions about the identity of P.
1 Three students, X, Y and Z, were told that solid P reacts with dilute acids and also conducts electricity. The table shows the students suggestions about the identity of P. Which of the students are
More informationSPECTROSCOPIC PROPERTIES OF Yb 3+ DOPED PHOSPHATE GLASS PREPARED BY SOL-GEL METHOD. M. R. Sahar, N. A. Noor Azmy and M. S. Rohani
SPECTROSCOPIC PROPERTIES OF Yb 3+ DOPED PHOSPHATE GLASS PREPARED BY SOL-GEL METHOD M. R. Sahar, N. A. Noor Azmy and M. S. Rohani Department of Physics, Faculty of Science, Universiti Teknologi Malaysia,
More informationD. Ehrt*, H. T. Vu, A. Herrmann and G. Völksch
Advanced Materials Research Online: 28-4-8 ISSN: 1662-8985, Vols. 39-4, pp 231-236 doi:1.428/www.scientific.net/amr.39-4.231 28 Trans Tech Publications, Switzerland Luminescent ZnO-Al 2 O 3 -SiO 2 glasses
More informationCOMPOSITION DEPENDENCE OF SPECTROSCOPIC PROPERTIES AND TRANSPARENCY OF SiO 2 -TiO 2 -Na 2 O GLASS IN nm
COMPOSITION DEPENDENCE OF SPECTROSCOPIC PROPERTIES AND TRANSPARENCY OF SiO 2 -TiO 2 -Na 2 O GLASS IN 200-1100 nm M. Ghamari 1, * and B. Mirhadi 2 * ghamari_iust@yahoo.com Received: December 2011 Accepted:
More information(FeNaP) 2 O 9 Glasses Doped with Different TM Ions
International Journal of High Energy Physics 2017; 4(6): 75-87 http://www.sciencepublishinggroup.com/j/ijhep doi: 10.11648/j.ijhep.20170406.12 ISSN: 2376-7405 (Print); ISSN: 2376-7448 (Online) (FeNaP)
More informationInvestigation of optical absorbance and crystallization of vanadium oxide in glasses
JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS Vol. 13, No. 6, June 2011, p. 679-683 Investigation of optical absorbance and crystallization of vanadium oxide in glasses BAHMAN MIRHADI, BEHZAD MEHDIKHANI
More informationProperties of Materials
Properties of Materials Thermal Properties Thermal Conductivity Temperature Wall The Thermal Conductivity (k) is the measure of the ability of a material to transmit heat by conduction. The heat (Q) is
More informationCHAPTER THE SOLID STATE
133 CHAPTER THE SOLID STATE 1. The ability of a substances to assume two or more crystalline structures is called [1990] Isomerism Polymorphism Isomorphism Amorphism 2. Most crystals show good cleavage
More informationChapter 2.5: Insulation & Refractories
Chapter 2.5: Insulation & Refractories Part-I: Objective type questions and answers 1. A thermal insulator is a) good conductor of heat and has high thermal conductivity b) poor conductor of heat and has
More informationOptical and Structural Properties of Copper-Doped Borate, Phosphate and Boro-phosphate Glasses
Optical and Structural Properties of Copper-Doped Borate, Phosphate and Boro-phosphate Glasses Devinder Singh a, Randev Singh a *,Sharanjeet Kaur b a Department of Physics, Sri Guru TegBahadurKhalsa College,
More informationQuartz Glasses. Types of Glass. Application. Physical and Chemical Properties. Forms of Product. SEE THE WORLD IN A NEW LIGHT Stand: 2/13
Types of Glass Application Physical and Chemical Properties Forms of Product Stand: 2/13 NOTE: All data in this product information brochure are general product specifications and not binding definition
More informationCHEM J-2 June 2014
CHEM1102 2014-J-2 June 2014 The diagram below shows the structure of an alloy of copper and gold with a gold atom at each of the corners and a copper atom in the centre of each of the faces. 2 What is
More informationWHEATON DUAL. Vial. Perfecting the science of sample protection
WHEATON Perfecting the science of sample protection WHEATON DualFusion vials combine the best properties of glass, with the mechanical strength and the precision molding of plastic. The vials are engineered
More informationStructure-Property Correlations in Borate, Silicate and Tellurite Glasses
Indo-French Workshop on Glasses and Glass-ceramics University of Science and Technology, Lille, France 6-8, June, 2012 Structure-Property Correlations in Borate, Silicate and Tellurite Glasses Atul Khanna
More informationCHALCOGENIDE GLASSES FOR OPTICAL AND PHOTONICS APPLICATIONS
Journal of Optoelectronics and Advanced Materials Vol. 6, No. 1, March 2004, p. 133-137 CHALCOGENIDE GLASSES FOR OPTICAL AND PHOTONICS APPLICATIONS D. Lezal *, J. Pedlikova, J. Zavadil a Laboratory of
More informationINVESTIGATIONS ON THE GLASS FIBER CONCRETE REINFORCEMENT WITH SrO-Mn 2 O 3 -Fe 2 O 3 -MgO- ZrO 2 -SiO 2 (SMFMZS) SYSTEM GLASS FIBERS
INVESTIGATIONS ON THE GLASS FIBER CONCRETE REINFORCEMENT WITH SrO-Mn 2 O 3 -Fe 2 O 3 -MgO- ZrO 2 -SiO 2 (SMFMZS) SYSTEM GLASS FIBERS Prof. Dr. Bekir KARASU Anadolu University, Department of Materials Science
More information10. P fertilizers rock phosphate bone meal basic slag Sources of phosphorus 1. Mineral deposit
10. P fertilizers rock phosphate bone meal basic slag The element was discovered in 1669 and was found to be widely distributed in the lithosphere as phosphates. It is found to occur mostly as calcium
More information2.4 Period 3. Na Mg Al Si P S Cl Ar
2.4 Period 3 Period 3 Na Mg Al Si P S Cl Ar Periodicity: Periodicity: The repeating trends in physical and chemical properties of elements as you go across the Periodic Table Periods often show gradual
More information3.3 Minerals. Describe the characteristics that define minerals.
3.3 Minerals Describe the characteristics that define minerals. Are you a mineral? There used to be a TV commercial that said "you are what you eat." If that s true - and to some extent it is - then you
More informationLecture No. (7) Rubber Fillers
Lecture No. (7) Rubber Fillers Introduction of Rubber Fillers Rubbers in general are seldom used in their only form because of they are too weak to fulfill practical requirements for many applications
More informationSulphur Problem. AkMB Rashid Professor, Department of MME BUET, Dhaka. Today s Topics
10 Sulphur Problem AkMB Rashid Professor, Department of MME BUET, Dhaka Today s Topics Introduction Behaviour of sulphur in metal and slag Oxidation of sulphur in the furnace Oxidation of sulphur in the
More informationI. PHYSICAL PROPERTIES. PROPERTY METALS NON-METALS 1.Lustre Metals have shining surface. They do not have shining surface.
Elements can be classified as metals and non-metals on the basis of their properties. Example of some metals are : Iron (Fe), Aluminium (Al), Silver (Ag), Copper (Cu) Examples of some non-metals are :
More informationCHAPTER 9. The Uses of Sulphuric Acid
CHAPTER 9 MANUFACTURED SUBSTANCES IN INDUSTRY SULPHURIC ACID The Uses of Sulphuric Acid 175 POLLUTION of Sulphur DIOXIDE Formation of Acid Rain Burning of Sulphur Burning of Sulphur Dioxide 176 Effect
More informationMetals And Their Properties- Physical and Chemical
Metals And Their Properties- Physical and Chemical All the things around us are made of 100 or so elements. These elements were classified by Lavoisier in to metals and non-metals by studying their properties.
More informationContents. Part I Introduction to Medical Ceramics
Contents Part I Introduction to Medical Ceramics 1 History, Market and Classification of Bioceramics... 3 1.1 Bioceramics... 3 1.2 Classification of Bioceramics... 6 1.2.1 Biopassive (Bioinert) and Bioactive
More informationAmorphous Materials Exam II 180 min Exam
MIT3_071F14_ExamISolutio Name: Amorphous Materials Exam II 180 min Exam Problem 1 (30 Points) Problem 2 (24 Points) Problem 3 (28 Points) Problem 4 (28 Points) Total (110 Points) 1 Problem 1 Please briefly
More informationCrystal Growth from Melts
Crystal Growth from Melts Applications to Growth of Groups 1 and 2 Crystals Bimalendu Narayan Roy Sheffield City Polytechnic, UK JOHN WILEY & SONS Chichester New York Brisbane Toronto Singapore Contents
More informationSemiconductor Technology
Semiconductor Technology from A to Z Oxidation www.halbleiter.org Contents Contents List of Figures List of Tables II III 1 Oxidation 1 1.1 Overview..................................... 1 1.1.1 Application...............................
More informationThe Science and Engineering of Materials, 4 th ed Donald R. Askeland Pradeep P. Phulé. Chapter 3 Atomic and Ionic Arrangements
The Science and Engineering of Materials, 4 th ed Donald R. Askeland Pradeep P. Phulé Chapter 3 Atomic and Ionic Arrangements 1 Objectives of Chapter 3 To learn classification of materials based on atomic/ionic
More informationContents. Part I Introduction to Medical Ceramics
Contents Part I Introduction to Medical Ceramics 1 History. Market and Classification of Bioceramics... 1.1 Bioceramics... 1.2 Classification of Bioceramics... 1.2.1 Biopassive (Bioinert) and Bioactive
More information(06) WMP/Jun10/CHEM5
Period 3 Elements 6 2 Sodium, aluminium and silicon are solid elements with a silver colour. These elements react with oxygen to form oxides with high melting points. Aluminium is a reactive metal, but
More informationNon-crystalline tetrahedral lattice of SiO 4. molecules with shared vertices (abstraction glass structure is far less regular)
G L A S S O R I G I N S & P R I M A R Y T R A N S F O R M A T I O N S O Si Standard Industrial Glass: Silicon Dioxide (SiO 2 ): 70-75% Soda (Na 2 O): 12-16% Lime (CaO): 10-15% O Silicon Dioxide (most common
More informationQ1. The data in the table below show the melting points of oxides of some Period 3 elements. O 10 O P (Extra space) (2)......
Q1. The data in the table below show the melting points of oxides of some Period 3 elements. Na 2 O P 4 O 10 SO 2 T m /K 1548 573 200 (a) In terms of structure and bonding, explain why (i) sodium oxide
More informationPY2N20 Material Properties and Phase Diagrams
PY2N20 Material Properties and Phase Diagrams Lecture 11 P. Stamenov, PhD School of Physics, TCD PY2N20-11 Silicates Combine SiO 4 4- tetrahedra by having them share corners, edges, or faces Mg 2 SiO 4
More informationStructural and Thermal Investigations on Sodium Alumino Borate Glasses
International Journal of ChemTech Research CODEN (USA): IJCRGG, ISSN: 0974-4290, ISSN(Online):2455-9555 Vol.10 No.9, pp 1026-1031, 2017 Structural and Thermal Investigations on Sodium Alumino Borate Glasses
More informationWINTER 2012 EXAMINATION Subject Code: Model Answer Page No: 1/10
(ISO/IEC - 700-005 Certified) WINTER 0 EXAMINATION Subject Code: 00 Page No: /0 Section-II (Applied chemistry) Sub.. a) ph: ph of a solution is defined as the negative logarithm to the base ten of hydrogen
More informationOxidation of Iron, Silicon and Manganese
08 Oxidation of Iron, Silicon and Manganese AkMB Rashid Professor, Department of MME BUET, Dhaka Today s Topics Oxidation of iron Oxidation and reduction of silicon Oxidation and reduction of manganese
More informationOne of the main ores of zinc is zinc blende, ZnS. There are two stages in the extraction of zinc from this ore.
1 Two of the main uses of zinc are for galvanising and for making alloys. One of the main ores of zinc is zinc blende, ZnS. There are two stages in the extraction of zinc from this ore. (a) Stage 1 Zinc
More informationIII. BASIC THEORY. occurring material composed primarily of fine-grained minerals, which is generally
III. BASIC THEORY Clay Guggenheim and Martin (1995) defined the term "clay" refers to a naturally occurring material composed primarily of fine-grained minerals, which is generally plastic at appropriate
More informationColor in glazes and enamels 15/03/53 1
Color in glazes and enamels 15/03/53 1 Sources of color in glazes Transition metal ions The precipitation of crystal: titania and zirconia Insoluble crystal or crystals that are colored 15/03/53 2 Crystal
More informationPhysical Properties: Glass and Soil. Criminalistics Chapter 4
Physical Properties: Glass and Soil Criminalistics Chapter 4 What is a property? A property is an identifying characteristic of a substance. There are two groups of properties that are important to forensic
More informationGLASS FORMATION AND DISSOLUTION PROPERTIES OF Na 2 O-CaO-P 2 O 5 GLASSES IN SIMULATED BODY FLUIDS
Romanian Reports in Physiscs, Volume 56, No. 3, P. 44-49, 004 GLASS FORMATION AND DISSOLUTION PROPERTIES OF Na O-CaO-P O 5 GLASSES IN SIMULATED BODY FLUIDS V. SIMON AND H. MOCUTA Physics Department, Babes-Bolyai
More informationThe Complete Book on Glass and Ceramics Technology (2nd Revised Edition)
The Complete Book on Glass and Ceramics Technology (2nd Revised Edition) Author: NIIR Board of Consultants & Engineers Format: Paperback ISBN: 9788178331751 Code: NI163 Pages: 624 Price: Rs. 1,495.00 US$
More informationThe Complete Book on Glass and Ceramics Technology (2nd Revised Edition)
The Complete Book on Glass and Ceramics Technology (2nd Revised Edition) Author: NIIR Board of Consultants & Engineers Format: Paperback ISBN: 9788178331751 Code: NI163 Pages: 624 Price: Rs. 1,495.00 US$
More informationReactivity Series. Question Paper. Cambridge International Examinations. Score: /39. Percentage: /100
Reactivity Series Question Paper Level Subject Exam oard Topic Sub-Topic ooklet O Level hemistry ambridge International Examinations Metals Reactivity Series Question Paper Time llowed: 47 minutes Score:
More informationGlass as matrix for hazardous substances
On the possibility of using vitrified forts as anthropogenic analogues for assessment of long- term behaviour of vitrified waste Rolf Sjöblom, Holger Ecke 1 and Evelina Brännvall Luleå University of Technology
More informationResearch & Reviews: Journal of Pure and Applied Physics
Research & Reviews: Journal of Pure and Applied Physics Physical and Optical Analysis of Erbium Doped Magnesium Zinc Phosphate Glass Sahar MR*, Zain SK, Ishak NA, Sazali ES and Yusoff NM Faculty of Science,
More informationOptical spectroscopy of sodium silicate glasses prepared with nano- and micro-sized iron oxide particles
Processing and Application of Ceramics 7 [3] (2013) 117 121 DOI: 10.2298/PAC1303117M Optical spectroscopy of sodium silicate glasses prepared with nano- and micro-sized iron oxide particles Behzad Mehdikhani
More informationEarth s Crust. Atoms build Molecules build Minerals build. Rocks build. Lecture 3 - Mineralogy.
Lecture 3 - Mineralogy http://www.soest.hawaii.edu/coasts/gg101/index.html Atoms build Molecules build Minerals build Rocks build Earth s Crust Common minerals that we mine and use. Mineral Name What It
More informationCHAPTER 4: Oxidation. Chapter 4 1. Oxidation of silicon is an important process in VLSI. The typical roles of SiO 2 are:
Chapter 4 1 CHAPTER 4: Oxidation Oxidation of silicon is an important process in VLSI. The typical roles of SiO 2 are: 1. mask against implant or diffusion of dopant into silicon 2. surface passivation
More informationFrom sand to silicon wafer
From sand to silicon wafer 25% of Earth surface is silicon Metallurgical grade silicon (MGS) Electronic grade silicon (EGS) Polycrystalline silicon (polysilicon) Single crystal Czochralski drawing Single
More informationSuggest one reason why spoons are electroplated. ... Why is hydrogen produced at the negative electrode and not sodium?
Q1.This question is about electrolysis. (a) Metal spoons can be coated with silver. This is called electroplating. Suggest one reason why spoons are electroplated. (b) When sodium chloride solution is
More informationChemical Analysis of Industrial Water TABLE OF CONTENTS
Chemical Analysis of Industrial Water TABLE OF CONTENTS Part I -The Chemical Principles of Water Treatment Introduction A. Objectives in Treating Feed Water for Boilers 1. Prevention of Scales and Deposits
More informationSolids SECTION Critical Thinking
SECTION 10.3 Solids A gas has neither a definite volume nor a definite shape. A liquid has a definite volume, but not a definite shape. A solid, the third state, has a definite volume and a definite shape.
More informationIntroduction. Chapter Safety
Chapter 1 1.1 Safety Before cleaning optics, first read the relevant safety data sheet (SDS) formerly known as material safety data sheet (MSDS) to communicate the dangers of hazardous chemical products;
More informationUnit-1 THE SOLID STATE QUESTIONS VSA QUESTIONS (1 - MARK QUESTIONS)
Unit-1 THE SOLID STATE QUESTIONS VSA QUESTIONS (1 - MARK QUESTIONS) 1. What are anistropic substances. 2. Why are amorphous solids isotropic in nature?. Why glass is regarded as an amorphous solid? 4.
More informationA. LEDOUX*, J.Y. DAUPHIN**, G. MESMAQUE***, P. VAST* +
Phosphorus Research Bulletin Vol. 8 (1998), 147-153 MECHANISM OF THE WETTABILITY OF ALUMINA BY POLYPHOSPHATE GLASSES A. LEDOUX*, J.Y. DAUPHIN**, G. MESMAQUE***, P. VAST* + * Laboratoire de Chimie Appliquee
More informationBORABU-MASABA DISTRICTS JOINT EVALUATION TEST 2012 Kenya Certificate of Secondary Education (K.C.S.E)
Name. School Candidate s Signature. Index No /. Date. 233/2 CHEMISTRY Paper 2 (Theory) JULY / AUGUST - 2012 Time: 2 Hours BORABU-MASABA DISTRICTS JOINT EVALUATION TEST 2012 Kenya Certificate of Secondary
More informationMetals I. Anne Mertens
"MECA0139-1: Techniques "MECA0462-2 additives : et Materials 3D printing", Selection", ULg, 19/09/2017 25/10/2016 Metals I Anne Mertens Introduction Outline Metallic materials Materials Selection: case
More information). Apart from borax pentahydrate, they are the most widely used industrial borate. O 3. Glass Viscosity Textile Fiber Glass (E Glass) X X X X
H 3 B Orthoboric Acid Boric Acid Technical Grade: Granular, Powder, Extra Fine Powder National Formulary (NF): Granular and Powder Special Quality (SQ): Granular European Pharmacopeia (EP): Granular and
More informationAppendix C1: Batch Kinetics Tests
Appendix C1: Batch Kinetics Tests This appendix contains the entire data set for the batch kinetics tests for the potential biofilter components. These tests were performed to provide estimates of optimal
More informationIntroduction to Composites
Section 1 Introduction to Composites By definition, composite materials are formed from two or more materials that have quite different properties. The resultant material has a heterogeneous microstructure
More informationHeat absorbing glass from rice husk ash for a sustainable environment
Waste Management and the Environment IV 521 Heat absorbing glass from rice husk ash for a sustainable environment G. Berkin Faculty of Architecture, T.C. Halic University, Turkey Abstract Rice growing
More informationTopic 2.6 GROUP 2, THE ALKALINE EARTH METALS
Topic 2.6 GROUP 2, THE ALKALINE EARTH METALS Trends in size, first ionization energy and electronegativity Trends in reaction with water Trends in solubility of group 2 sulphates and hydroxides PROPERTIES
More informationGlass Processing Course
Glass Processing Course Lecture 4. COLOR IN COMMERCIAL GLASSES JAMES E. SHELBY Professor Emeritus Alfred University shelbyje@alfred.edu Spring 2015 An Online-learning resource from the IMI-NFG Lecture
More informationThe Increasing Importance of the Thermal Conductivity of Ceramics
The Increasing Importance of the Thermal Conductivity of Ceramics Ceramics Expo 2017 Richard Clark - Senior Technical Specialist richard.clark@morganplc.com www.morganadvancedmaterials.com Contents Overview
More informationTopic 9 National 4 Chemistry Summary Notes. Metals and Alloys. Materials
Topic 9 National 4 Chemistry Summary Notes Metals and Alloys LI 1 Materials Materials are all substances and include: metals ceramics plastics natural substances novel substances. Materials can be used
More informationUndesirable impurities in boilers. Maximum permissible Cycles of concentration (NC)
Maximum permissible Cycles of concentration (NC) From the relationship BD/S = [L/S] / [NC - 1] calculated at material balance in boiler section, as long as L/S is related to system parameters and it is
More informationCeramics are inorganic, non-metallic. Ceramics. Ceramics exhibit ionic, covalent bonding or a combination of the two (like in Al 2 O 3 )
What are Ceramics? CERAMIC MATERIALS Ceramics are inorganic, non-metallic and crystalline materials that are typically produced using clays and other minerals from the earth or chemically processed powders
More informationProperties of metals
For more awesome resources, visit us at www.savemyexams.co.uk/ Properties of metals Question Paper Level IGSE Subject hemistry (060/097) Exam oard ambridge International Examinations (IE) Topic Metals
More informationOxygen Formula: O 2 Bonding: covalent Appearance: colourless gas. Oxygen is one of the two main gases in our atmosphere, the other being nitrogen.
Composition of the air Air is a mixture of gases. The approximate amount if each gas in dry air is shown in the pie chart (right), but you should be aware that air also contains a variable amount of water
More information