Shanghai Gongtao Ceramics Co., Ltd.

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1 1. Alumina ceramic tubes Gongtao company mainly produce alumina tubes, rods and various industrial ceramic parts, which are mainly used in thermalcouple temperature, liquid steel continous temperature, various industrial furnace(containig vacuum furnace, carburizing furnace, wire furnace, atmosphere furnace etc), especially widely used in petrochemical, spinning, electric, instrumentation, mechanical workout, military project etc industry.our items are various and exported to many countries.welcome to contact us! 1) Specification: Dimension Item Outer dia. mm Inner dia.mm Length mm Remark Thermocouple protection tube Insulated tube Single hole If you need others,we can (inner core) Double holes customize for you. Four holes ) Property of material: AL2O3 conent % Bulk density(g/cm3) Flexural Strength(MPa) Coefficient of linear expansion( 10-6/ )( )

2 Thermal conductivity[w/(m.r)] Insulated strength(kv/mm) Bulk density resistance(ω.cm)20 >1014 >1014 >1014 >1014 >1014 >1014 >1014 > >1013 >1013 >1013 >1013 >1013 >1012 >1010 >1010 Long term operating temperature ( ) Hardness Refractoriness ) Photo: 2. Alumina Rods,Ceramic Rods

3 3. Alumina crucibles Gongtao company can make various crucibles and saggers made of high alumina,with different shapes.and we can also custom based on the requirement. Series: Alumina ceramic crucible Corundum ceramic crucible Arc alumina crucibles(high form alumina crucibles) Cylindrical alumina ceramic crucibles Rectangular crucibles Special shaped crucibles Alumina saggers Fireclay crucibles,zirconia crucible, magnesia crucible Property:

4 Item Alumina crucible Al 2 O 3 99 Chemical component R 2 O 0.2 Fe 2 O SiO Vol.density(g/cm 2 ) 3.80 Apparent Porosity(%) <1 Bending Strength(Mpa) >350 Compression strength (Mpa) >12000 Permittivity (1MH z ) 2 The max.operating temperature 1800 Specification: 5ml 10ml 15ml 20ml 25ml 30ml 50ml 100ml 150ml 200ml-2500ml Main purpose of crucible and sagger is as a container for analysis and firing of material and product applied in various industries. For example: analysis of coal, melting of the metal, Purpose analysis and firing of chemical raw materials, analysis and melting of glass, analysis and firing of rare earth materials and mineral,firing of high temperature items such as ceramic products and melting of single-crystal raw materials. Under normal circumstances,firstly put the items which need to be analyzed and fired into the crucible or sagger.then heat. The speed of heating and drop in temperature are according to Use the characteristics of equipment and products, fast or slow.because of the thermal expansion of raw material which the crucibles and saggers are made of, too quick heating or cooling will easily lead to cracking of the crucibles and saggers.the best way is slowing down,which can prolong the life of them.

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7 4. Alumina jar,pot mill,ceramic grinding pot/jar. Alumina ceramic mill pot is a kind of mill pots which has wear-resistance.we can also supply plain ceramic mill pot:99% ceramic mill pot. The spe:0.5 litre,1.2 litre(standing),1.2 litre(lying),3 litre,5 litre,10 litre,20 litre. Al2o3 content: 65%,95%,99% Rockwell hardness 80, impact resistance Water absorption 0.02 Vol.density 3

8 Wear-resistance coefficient 0.9 Application Electrical eramic,magnetic material,pigment and dope,special cement, porcelain enamel and glaze The mill pot produced by gongtao company have monolithic construction,big round arc angle.the mouth of pot can be sealed and opened easily,tight seal,beautiful sculpt,hard and durable.bad phenomena such as gap,leak,material stock,dead space ect can not occur in use.and Gongtao company can also offer you rock bottom price for 65% al2o3 ceramic mill pot. Property:Hard,wear-resistant Purpose:Used in material crush,one part of ball grinding mill. In a word,the mill pot have good chemical stability and wear-resistance.it is used widely in crushing various chemical and industrial products,medicament,rare earth material and various silicate material. We can supply mill ball such as agate mill ball,zirconia mill ball

9 Zirconia grinding jar Ball mill machines: Other zirconia tube,ring,parts

10 Polyamide Jars Grinding balls,alumina balls,zirconia balls,si3n4 balls

11 5. Mortar and pestle Ceramic mortar and pestle Alumina mortar and pestle Agate mortar and pestle

12 6. Ceramic Heating Elements: 1) IR ceramic heater Specification: Size(mm) Shape Power(Kw) Size(mm) Shape Power(Kw) arc flat arc flat arc Φ70 disk flat Φ100 disk arc Φ140 disk flat Φ150 Φ100 Φ60 haff arc flat The components: a.base body:made of ceramic material with good heat shock property. b.heating nature:sintered by high quality nichrome wire. c.glaze:composed of metal oxide material with good far infrared radiated property. d.put right amount of additive and improve radiant intensity and strengthen adaptability of glaze billet Main technical parameter and property:

13 1.Radiated characteristic:the tiptop single color of radiance of element can reach Time of heating response:from room temperature to surface temperature of radiated plate,the fixed time will not exceed 20 minutes. 3.Cold and hot resistance:the base body is heated to 800 C and put in cold water repeatly for many times and no cracking.after cold and hot mutual change test for five times,no peel and no craze. 4. The radiated element is heated after electrifying to rating power and immerged into cold water after interruption of power supply for forty times without damage. 5.Good chemical stability;strong causticity-resistance;perfect oxidation-resistance 6.The heating damage of non radiated surface is small. 7. Resistance in common temperature: ohm 0 cm 8.Uneven degree for radiated surface temperature: 15% 9. Rupture strength for base body: 440Kg/cm2 10.Tolerance of power: 5% at rating working voltage 11.Cold state insulated resistance 500V tramegger>2 mω 12.Thermal state insulated resistance: 500V tramegger>5 mω 13.Using life span: >3000 hours 14.The effect of energy saving is obvious,increasing 10-25% compared with silicon carbide element 15. The life span can prolong more than a few times compared with silicon carbide element. Applying domain: Embedding type ceramic far infrared radiated heating elements are produced based on direct of international advanced technique and many years research,with high conent of technology,good whole property,cleanness & sanitation,convenient assemble,acid-resistance,erodibility-resistance Safe use,long life span ect.widely used in vacuum plastic uptake,food roast, medical treatment and sanitation ect various infrared dryness and roast,solidify ect.they have ideal energy saving effect in the industry such as electron spin,light industry, electromechanical chemical industry, medical treatment,food industry ect and have obvious society benefit and economy benefit.

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15 2) Ceramic heater element a

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18 3) Flexible Alumina Ceramic Heating Pad 4) Quartz heating element:

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21 5) Accessory:

22 Heater plug

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25 7. Mica product: 8. Other ceramic items 1) Ceramic bearing:

26 2) Ceramic pins

27 3) Ceramic guide pulley 4) Alumina ceramic screws: 5) Honey ceramic

28 6) Ceramic pegs 7) Others

29 Silicon carbide heating element

30 Sic Tube

31 Ceramic parts a.ceramic spark plug Ceramic terminal blocks for thermocouple

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