Microstructure and properties of spodumene based Li-Si-Al-O-N glass ceramics

被引:0
|
作者
Nordmann, A [1 ]
Cheng, YB [1 ]
机构
[1] MONASH UNIV, DEPT MAT ENGN, CLAYTON, VIC 3168, AUSTRALIA
来源
BRITISH CERAMIC TRANSACTIONS | 1997年 / 96卷 / 04期
关键词
D O I
暂无
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
Glasses and glass ceramics in the Li-Si-Al-O-N system were prepared using a natural mineral resource, and the microstructures and mechanical and thermal properties examined. The dominant phases that formed in the Li oxynitride glass ceramics were beta-quartz(ss) and beta-spodumene(ss), and these were believed to develop with equiaxed and acicular grain morphologies respectively. Silicon oxynitride Si2N2O and X-phase Si3Al6O12N2 formed as minor phases. Nanoindentation was used to assess the hardness and elastic moduli of the Li-Si-Al-O-N materials and both parameters were observed to increase with increasing nitrogen content. Thermal expansion measurements revealed that the low expansion characteristics of mineral derived beta-quartz(ss) and beta-spodumene(ss) were generally retained when nitrogen was introduced into the Li2O-Al2O3-SiO2 system. (C) 1997 The Institute of Materials.
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页码:141 / 148
页数:8
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