PREPARATION OF ZRO2-CAO AND ZRO2-MGO FIBERS BY ALKOXIDE SOL-GEL PROCESSING

被引：20
作者：
CHATTERJEE, M
CHATTERJEE, A
GANGULI, D
机构：
[1] Central Glass and Ceramic Research Institute, Calcutta
来源：
CERAMICS INTERNATIONAL | 1992年 / 18卷 / 01期
关键词：
D O I：
10.1016/0272-8842(92)90060-Q
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：
Extensive studies were made on the spinnability of Zr(O-nC3H7)4-derived sols for the preparation of ZrO2-CaO and ZrO2-MgO fibres. An improved preparative route was proposed in which acetylacetone controlled the hydrolyzability of the alkoxide and 2-methoxyethanol served as a slow-drying solvent. The advantages of the method of sol preparation over the known methods were highlighted. Crystallization behaviour of the gel fibres was studied mostly up to 1300-degrees-C for ZrO2-CaO fibres (up to 20 %mol CaO) and up to 1000-degrees-C for ZrO2-MgO fibres (up to 12 %mol MgO). ZrO2-CaO fibres (7-11% mol CaO) were Found to yield only the tetragonal and cubic polymorphs of ZrO2 after heating at 1300-degrees-C/4h and furnace cooling. ZrO2-MgO fibres, on the other hand, showed exsolution of MgO above 800-degrees-C and development of monoclinic ZrO2.
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页码：43 / 49
页数：7
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