GELATION CHARACTERISTICS OF ALUMINUM TITANATE PRECURSOR SOLS IN DIFFERENT SOLVENT MEDIA

被引：2

作者：

MANI, TV ^{[1
]}

VARMA, HK ^{[1
]}

WARRIER, KGK ^{[1
]}

DAMODARAN, AD ^{[1
]}

机构：

[1] CSIR,REG RES LAB,THIRUVANANTHAPURAM 695019,INDIA

来源：

CERAMICS INTERNATIONAL | 1992年 / 18卷 / 01期

关键词：

D O I：

10.1016/0272-8842(92)90064-K

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：

Stable sol containing boehmite (Al-O-OH) and titanium butoxide in 1:1 Al2O3-TiO2 stoichiometry was prepared in the presence of acetate ions. The progress of gelation was studied by nephelometry. Gelation was carried out in 2:1 water-isopropanol and water-dioxane mixtures having different polarities. The time required for the formation of aluminium titanate precursor gel is considerably reduced in the case of water-isopropanol and water dioxane systems. All the gels have been spray-dried to spherical powders which were further characterised by thermal decomposition, particle-size distribution and surface morphology. The TGA curves were identical while there was considerable variation in the particle size and morphology.

引用

页码：69 / 72

页数：4

共 11 条

[1] Dworak, Fingerle, Ceramic materials for engines, Br. Ceram. Trans. J., 86, (1987)
[2] Freundenberg, Mocellin, Aluminium titanate formation by solid state reaction of fine alumina and titania powders, Journal of the American Ceramic Society, 70, (1987)
[3] Thomas, Stevens, Aluminium titanate—A literature review—Part 2, Br. Ceram. Trans. J., 88, (1989)
[4] Cleveland, Bradt, Grain size/microcracking relations for pseudobrookite oxide, J. Am. Ceram. Soc., 61, (1978)
[5] Parker, Rice, Correlation between grain size and thermal expansion for aluminium titanate materials, J. Am. Ceram. Soc., 72, (1989)
[6] Okamura, Barringer, Bowen, Preparation and sintering of monosized Al2O3TiO2 composite powder, Journal of the American Ceramic Society, 69, pp. C-22, (1986)
[7] Hench, West, The sol gel process, Chem. Rev., 90, (1990)
[8] Hench, Ulrich, Ultrastructure Processing of Ceramics, Glasses and Composites, (1984)
[9] Varma, Warrier, Damodaran, Influence of the precipitation medium on the properties of fine alumina powders, Ceramic International, 16, (1990)
[10] Horn, Messing, Alumina monolith formation by flocculation of boehmite sols, J. Am. Ceram. Soc., 72, (1989)

← 1 2 →