Process study on the formation of nanocrystalline alpha-alumina with novel morphology at 1000 degrees C

作者：Zhang Xiaoxue^*; Ge Yanling; Hannula Simo Pekka; Levanen Erkki; Mantyla Tapio

来源：Journal of Materials Chemistry, 2009, 19(13): 1915-1922.

DOI：10.1039/b819592g

We have reported in a short communication that nanocrystalline alpha-alumina with novel morphology was synthesized at a relatively low temperature of 1000 degrees C without any seed material. The alpha-alumina nanocrystallites at a size of 5 nm were observed for the first time, and more interestingly the nanocrystallites organized themselves into nanorods having widths of about 15 nm and lengths of about 50-250 nm. In this follow up full paper, detailed processing parameters of such nanocrystalline alpha-alumina are reported and more characterizations are carried out in order to study the mechanism of the synthesis. The formation scheme of the novel morphology of such nanocrystalline alpha-alumina is illustrated and the phase transformation from transition aluminas to alpha-alumina is discussed.

• 出版日期2009