Abstract
Improvement of thermal shock resistance of wollastonite (β-CaSiO3) sintered body has been performed by adding spodumene (β-LiAlSi2O6) which has a low thermal expanson coefficient.
In this study, influence of spodumene content on sintering behaviour, mechanial properties (3-point bending strength, Vickers hardness), thermal properties (thermal expansion coefficient, thermal shock resistance), and microstructure of wollastonite/spodumene composites was investigated.
The results obtained are as follows;
1) Abrupt decreace in densification temperature can be observed on spodumene content of 25-75 mass%.
2) Bending strength has a clear dependency on spodumene cotent, however no dependency of spodumene content on Vickers hardness can be observed.
3) The thermal expansion coefficient decreased in proportion to spodumene content, and thermal shock resistance was improved with an increace of amount of spodumene.
