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制备粒度细且均匀、纯度高的氮化铝粉,是获得质量高的陶瓷材料的重要条件。本文采用细氧化铝粉在碳存在时氮化的方法制备氮化铝,获得含氮量33%,粒度2-5微米的细氮化铝粉。根据热力学计算,在试验温度下(1650～1750℃)有碳存在时,氧化铝可以氮化为 A1N。氧化铝被碳还原和被氮化的过程,是互相促进并同时交替进行的过程。试验表明,适当过量
Preparation of fine and uniform size, high purity aluminum nitride powder, is to obtain high quality ceramic materials, an important condition. In this paper, aluminum nitride powder is prepared by nitridation in the presence of carbon to obtain aluminum nitride powder with a nitrogen content of 33% and a particle size of 2-5 microns. According to thermodynamic calculations, alumina can be nitrided to A1N when carbon is present at the test temperature (1650-1750 ° C). The process of alumina reduction and nitridation by carbon is a process that is promoted and alternated with each other at the same time. Test shows that appropriate excess