煅烧温度对主晶相为莫来石复合纳米晶热稳定性的影响

INFLUENE OF CALCINATION TEMPERATURE ON THERMAL STABILITY AND THE GRAIN DISTRIBUTION OF MAJOR PHASES MULLITE COMPOSITE NANOCRYSTALLINE

以天然矿为原料 ,用水热法制备了主晶相为莫来石复合纳米晶 .在相同时间 ,不同温度下进行了煅烧处理 ,用XRD ,TEM ,BET及TG -DTA等实验手段 ,对不同温度处理后的复合纳米晶的热稳定性 ,粒度分布进行了表征 .实验证明 ,对不同温度处理后的复合纳米晶表现出良好的热稳定性 .粒度随温度的变化趋于完整 .

Major phases of mullite composite nanocrystalline was synthesized by hydrothermal crystallization method. It was calcined at different temperatures for the same time. The effect of calcining temperature on the thermal stability and grain distribution was investigated by means of XRD, TEM, BET and TG-DTA measurements. The results indicate that the composite nanocrystals are very stable and the particle size with temperature become to completion.