pH值对AlN粉末水解产物的影响

Influence of the pH Value on the Hydrolysis Product of AlN Powder

通过测定500nm的氮化铝粉末在不同pH值下的水解行为,利用XRD、SEM和TEM分析研究了氮化铝粉末的水解产物。结果表明,在pH=12环境下水解产物为纳米纤维状,在Ph=7环境下水解产物为短棒状,在pH=5环境下水解受到抑制。XDR表明,在80℃下水解时,AlN粉末的水解产物为AlOOH。SEM和TEM表明,在pH=5环境AlN形成了一个保护层,在pH=12环境下时,氨水会使水解产物形成团聚。

The hydrolysis behavior of the 500nm AlN powder at different pH was observed and its reaction products were characterized by XRD, SEM and TEM. The results show： in the environment of pH 12, the hydrolysis products are nanofibers; in the natural environment, the hydrolysis products are short nanorods; in the environment of pH 5, the hydrolysis is repressed. XDR shows that the hydrolysis products at 80℃ are AlOOH, SEM and TEM micrographs show a protective film can be produced from AlN at pH 5. In the environment of pH 12, ammonia can agglomerate hydrolysis products.