Investigation of Sol-Gel Derived SiO 2 - P 2 O 5 CaO- Na 2 O Bioactive Glass Using Various Precursors. SiO 2

Transcription

1 SiO 2 P 2 O 5 CaO Na 2 O 2 1 1* /07/05 : 1394/05/31 : 1394/04/09 : SiO 2 -P 2O 5 - CaO Na 2O - ( ) / /.. Na Ca.. FTIR STA Na 2O 24/4 Na 2O /7 : Investigation of Sol-Gel Derived SiO 2 - P 2 O 5 CaO- Na 2 O Bioactive Glass Using Various Precursors Shokofeh Borhan 1, Saeid Hesaraki *1, Ali Asghar Behanamghader 1, Ebrahim Ghasemi 2 1 Materials & Energy Research Center, Nanotechnology and Advanced Materials, Karaj, Iran. 2 Institute for Color Science and Technology, Tehran, Iran. Abstract In this research, sol-gel bioactive glass in SiO 2 - P 2 O 5 CaO - Na 2 O system using common nitrate precursors was investigated. Some parameters like water/alcohol/ ratio, type of catalyst (acid or alkali) and temperature of heat treatment were also studied. Various precursors such as acetates, carbonates and chlorides were utilized to introduce Ca and Na in glass composition. Characterization of crystallization temperature, created phases and chemical groups in synthesis powder was accomplished by STA, and FTIR analyses. Although above-mentioned parameters influence on final powder characteristics, their changes cannot induce amorphous phase development in composition with high amount of Na 2 O and sodium nitrate is always observed in their patterns. Results indicated that by decreasing Na 2 O from 24.4 %mol. to 13.7 %mol. in glass composition, amorphous phase could be achieved. Keywords: Bioactive glass, Sol-gel, Sodium nitrate. * s-hesaraki@merc.ac.ir : - : : :

2 [7] 45S Na 2 Ca 2 Si 3 O 9 Chen - -.[9].[6] Na 2 Ca 2 Si 3 O 9...[7] -.[10] 24/4. - Na 2 O / / Na 2 O.. - Na 2 O. Na 2 O - (SiO 2, CaO, P 2 O 5, Na 2 O) Hench -1...[1] Si.[1]. - -.[2].[3]. - SiO 2, CaO, ) - (SiO 2, CaO) (P 2 O 5.[4] - SiO 2, CaO, Na 2 O ).[5] (P 2 O 5, Na 2 O Na.[7 6] 45S5 Na 2 O 24/4 SiO 2 P 2 O 5 2/6 46/1 CaO 26/9.[8]

3 TEP (1) (PL-STA 1600, England) (TG DTA) Vector ) FTIR. X (Brooker 33. (Philips PW 3710) (TEP:OP(C 2 H 5 ) 3 ) P 2 O 5 SiO 2 (SiO 2 -P 2 O 5 - CaO Na 2 O) - CaO Na 2 O (:Si(OC 2 H 5 ) 4 ).. (Ca(NO 3 ) 2.4H 2 O) (CaCl 2 ) (Na 2 CO 3 ) (CH 3 COONa) (NaNO 3 ) (NaCl) (Ca(CH 3 COO) 2 ) (CaCO 3 )... (1) Na 2 O 6 - :[11] =21.6, = 8.83, = 0.05 =0.2 : rpm

4 FTIR (3) DTA Na 2 CaSi 3 O 8..[12] FTIR. (4) cm -1 P-O 1650 cm cm -1.. cm -1. O-H TG DTA.2 TG DTA (2) -.. TG CaO Na 2 O %5. DTA DTA [1]...3

5 [15] ph. ( -5 ).. (.[15] :6 ( (.6 ( 550 (.620.[13] ( =50 (.5. ( -...[14] /6-5 = [14].

6 CO CaCO +2H O Ca +CO +3H O Na CO +2H O 2Na +CO +3H O.[16] ( 1) ( 2). 2 ( -7 ) ) 620. ( -7.( ) TG -8. Na 2 O 13/7 X Na 2 O -5-3 SiO 2 P 2 O 5 1/7 52/3 (9) CaO 32/ ( -6 ). ( -6 ) ( -6 ). [16] 620..( -6 ) S5 45S5 Girot ( (.7 620

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