钛酸铝-莫来石陶瓷热稳定性的研究

Stability of Aluminium Titanate-Mullite Ceramic

本文运用XRD、RPD、SEM、EDS等手段详细研究了钛酸铝-莫来石复合材料中莫来石相对钛酸铝热稳定性的影响．实验发现：复合材料的合成温度影响莫来石对钛酸铝陶瓷热分解的抑制作用，而且莫来石的加入量和种类以及热处理时间，也是影响莫来石抑制钛酸铝分解效果的因素．莫来石抑制钛酸铝分解机理的研究表明：莫来石与钛酸铝生成的固溶体以及莫来石晶粒对钛酸铝晶粒具有压制作用，从而有效地提高了钛酸铝的稳定性．

The stabilizing effect of mullite on aluminium titanate was studied in detail through XRD, RPD, SEM and EDS. The sintering temperature was found to thect the stability of aluminium titanate. The content and the variety of mullite, as well as annealing time, have influence on the composites. In addition, the mechanism of mullite suppressing the thermal decomposition of aluminium titanate was discussed. Solid solution and mullite grain can suppress the grain of aluminium titanate, which results in the improvement on the stability of aluminium titanate.