Influence of Raw Materials on the Carbothermal Synthesis of Single-Phase Aluminum Oxynitride Powder

Abstract:

Aluminum oxynitride powders were synthesized by carbothermal reduction, using nano-sized alpha-alumina, gamma-alumina and carbon as raw materials. Effects of the weight percentages of alpha-alumina in alumina (R) and synthesizing temperatures (T) on the preparation of single-phase AlON powders have been studied. The results showed that proper R can reduce the shrinkage and increase the formation rate of AlON phase, but a high R will reduce the formation rate of AlON phase, because the activity of alpha-alumina was lower than that of gamma-alumina. Single-phase AlON powder with excellent properties can be obtained under the condition of R=0.15, T=1700°C. Moreover, this single-phase AlON powder was well-dispersed with an average size of about 2 μm.

• Periodical: Key Engineering Materials (Volumes 368-372)
• Pages: 438-440
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.368-372.438
• Online since: February 2008
• Authors: Hai Ping Wang, Deng Xue Wu, Wei Pang, Jian Qi Qi, Ji Cheng Zhou, Jin Song Wen, Zi Meng Cheng, Ya Wen, Zhi Jun Liao, Tie Cheng Lu
• Keywords: AlON Powder, Carbothermal

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