用还原法合成氮化铝（ALN）粉末

本文从合成温度和保温时间讨论了对合成氮化铝(AlN)质量的影响,研究了由不同方法得到的Al_2O_3原料对合成AlN质量的影响.经x-射线衍射分析和电镜观察,结果表明:对于同一种原料,在保温时间一定,温度低于1900℃时,可得到质量较高的AlN粉末;在一定温度下,随保温时间的延长,合成AlN粉末的纯度也越来越高:由粒度小、纯度高的γ型及无定形态组成的Al_2O_3粉,在一定条件下合成质量好的AlN粉末.

THE COMBINATION ALUMINIUM INTRIDE POWDER BY MEANS OF REDUCTION

In this paper we have discussed the effects on the quality of the combined AlN at the temperature of combination and at the time of heat-preserving, and have also studied the effects of the raw material Al_O_3 got in a different way on the quality of the combined AlN. Through the analyzing of the x-ray diffraction and the observation with SEM, we have the result that we can get the AlN powder of highquality from this same raw material at a given time of heat-preserving and at the temperature of lower than 1900 C; and at a given temperature, as the heat-preserving time is lengthened, the purity of the combined AlN powder is higher and higher. In a certain condition the AlN powder of high quality can be made from the Al_2O_3 powder which, with little size and high quality, is composed of r-type and the irregular state.