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以氧化铝、碳黑、硝酸铝、葡萄糖为原料 ,采用 2种不同的工艺制备了氧化铝 碳黑和硝酸铝 葡萄糖 2种体系的原料混合物 ,研究了原料的种类对氮化铝粉末合成反应的影响 .研究结果表明 :以氧化铝和碳黑为原料时 ,氮化反应过程中只出现了α Al2 O3和AlN相 ,该原料体系反应速度较慢 ,在温度为 16 5 0℃时氮化 3～ 5h才能实现完全氮化 ;而以硝酸铝和葡萄糖为原料时 ,氮化反应过程中相变较复杂 ,出现了γ Al2 O3,α Al2 O3,AlON和AlN相 ,该原料体系反应速度较快 ,15 5 0℃时仅需 1～ 2h便可实现完全氮化 ;不同的起始原料不仅可以影响反应速度 ,还对粉末的粒度有较大影响 ,以氧化铝和碳黑为原料合成的氮化铝粉末的平均粒度约为 0 .7μm ;而以硝酸铝和葡萄糖为原料合成的氮化铝粉末的平均粒度约为 0 .1μm .
Alumina, carbon black, aluminum nitrate, glucose as raw materials, two different processes were used to prepare a raw material mixture of alumina carbon black and aluminum nitrate glucose two systems studied the synthesis of aluminum nitride powder synthesis reaction .The results show that when alumina and carbon black are used as raw materials, only α Al 2 O 3 and AlN phases appear during the nitriding reaction, and the reaction speed of this raw material system is relatively slow. When the temperature is 16 5 0 ℃, nitrided 3 ~ 5h to achieve complete nitriding; while aluminum nitrate and glucose as raw materials, the phase transition during the nitriding reaction is more complicated, there γγ2 O3, α Al2 O3, AlON and AlN phase, the raw material system reaction faster , Complete nitriding can be achieved only at 1 ~ 2h at 1550 ℃. Different starting materials can not only affect the reaction rate, but also have a greater impact on the particle size of the powders. Nitrogen synthesized from alumina and carbon black The average particle size of the aluminum powder is about 0.7 μm. The average particle size of the aluminum nitride powder synthesized from aluminum nitrate and glucose is about 0.1 μm.