铝热法合成TiB_2－Al_2O_3系陶瓷原料反应机理

Reaction mechanism of aluminithermic synthesis of ceramic raw material series TiB_2-Al_2O_3

通过Ａｌ，Ｂ２Ｏ３和ＴｉＯ２体系的热力学分析指出了铝热法合成ＴｉＢ２的可能性．通过各种不同条件下反应过程的差热实验、Ｘ射线衍射等实验分析，对该体系的反应机理有了较系统深入的认识，得出：利用Ａｌ，Ｂ２Ｏ３和ＴｉＯ２（锐钛砂）在氩气中以较低的温度可合成出较纯的ＴｉＢ２及Ａｌ２Ｏ３陶瓷原料．

Thermodynamic analysis of system composed of Al,B2O3 and TiO2 reveals the possibility of aluminithermic synthesis for TiB2.Its reaction mechanism is understood systematically and thoroghly by means of experimental analysis of the data obtailled by diffferential thermometer test and X-ray diffraction test.Employing the ore composed of Al,B2O3,and TiO2,a fairly pure raw ceramic material composed of TiB2 and Al2O3 can be synthesised in the argon ambient under the condition of lower temperature.