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

Abstract:

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong

Pages:

438-440

DOI:

10.4028/www.scientific.net/KEM.368-372.438

Citation:

H. P. Wang et al., "Influence of Raw Materials on the Carbothermal Synthesis of Single-Phase Aluminum Oxynitride Powder", Key Engineering Materials, Vols. 368-372, pp. 438-440, 2008

Online since:

February 2008

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Price:

$35.00

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