Gelcasting of alumina and zirconia using chitosan gels

被引:77
作者
Bengisu, M
Yilmaz, E
机构
[1] Eastern Mediterranean Univ, Dept Chem, Famagusta TRNC, Famagusta, Turkey
[2] Eastern Mediterranean Univ, Dept Ind Engn, Famagusta TRNC, Famagusta, Turkey
关键词
Al2O3; ZrO2; gelcasting; chitosan; gel; ceramic; preconsolidation;
D O I
10.1016/S0272-8842(01)00115-8
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A new gelcasting system has been analysed. The gel forming system is based on a solution of 1% chitosan in diluted acetic acid and reaction with glutaraldehyde. An Al2O3 powder-loading rate of 50 vol.% was achieved under optimised conditions. Advantages of this new system include the use of a biopolymer (chitosan), possibility of air drying of green parts, possibility of gelcasting at ambient temperature, and versatility of the process by changing process parameters leading to well specified reaction times. The effect of process parameters on reaction time, slurry properties, and green part properties are presented. Slurries prepared from ZrO2 powders were not fluid. However, dense green parts could still be obtained by transferring these slurries to a mould and drying. (C) 2002 Elsevier Scierice Ltd and Techna S.r.l. All rights reserved.
引用
收藏
页码:431 / 438
页数:8
相关论文
共 17 条
[1]  
AKSAY IA, 1996, BIOMIMETIC MAT CHEM
[2]   Thermoreversible gels of chitin [J].
Bianchi, E ;
Marsano, E ;
Tacchino, A .
CARBOHYDRATE POLYMERS, 1997, 32 (01) :23-26
[3]  
Chartier T., 1994, CER ACTA, V6, P17
[4]  
Franks GV, 2000, J AUST CERAM SOC, V36, P1
[5]  
Ghosal S, 1999, J AM CERAM SOC, V82, P513, DOI 10.1111/j.1151-2916.1999.tb01795.x
[6]  
Huha MA, 2000, J AM CERAM SOC, V83, P1957
[7]   PROCESSING-RELATED FRACTURE ORIGINS .3. DIFFERENTIAL SINTERING OF ZRO2 AGGLOMERATES IN AL2O3/ZRO2 COMPOSITE [J].
LANGE, FF ;
DAVIS, BI ;
AKSAY, IA .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1983, 66 (06) :407-408
[8]   The study of gelation kinetics and chain-relaxation properties of glutaraldehyde-cross-linked chitosan gel and their effects on microspheres preparation and drug release [J].
Mi, FL ;
Kuan, CY ;
Shyu, SS ;
Lee, ST ;
Chang, SF .
CARBOHYDRATE POLYMERS, 2000, 41 (04) :389-396
[9]   Aqueous gel-forming of silicon nitride using carrageenans [J].
Millán, AJ ;
Nieto, MI ;
Moreno, R .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2001, 84 (01) :62-64
[10]  
Morissette SL, 2000, J AM CERAM SOC, V83, P2409