含锂铝硅微晶玻璃的钛酸铝陶瓷的显微结构

运用透射电镜、电子衍射、元素能谱分析，及热膨胀系数和力学性能综合测试手段，研究了含LiO2-Al2O3-SiO2（LAS）微晶玻璃的钛酸铝陶瓷显微结构及力学性能。实验结果表明，LAS微晶玻璃的玻璃相促进了钛酸铝陶瓷的液相烧结而提高其力学性能，同时通过玻璃相中析出低膨胀的微晶又使陶瓷的热膨长系数下降。

Microstructure of Aluminium Titanate Ceramics with LAS Glass-ceramics

By means of comprehensive measures including TEM, ESR, thermal expansion coefficient and mechanical strength, the effects of LAS glass-ceramics on microstructure and mechanical properties of aluminium titanate ceramics were investigated. The results show that bending strength and Young's modulus of the ceramics increase with the reduction of apparent porosity by liquid sintering of glass phase. Microcrystallization from the glass-ceramics with low thermal expansion is responsible for low thermal expansion coefficient of the ceramics.