Effects of Sintering Techniques on the Microstructure and Performance of High Purity Beryllium Oxide Ceramics

doi:10.3724/SP.J.1077.2010.00415

Abstract

Abstract: The effects of traditional, multistep and two-step sintering technique on the microstructure and performance of high purity beryllium oxide ceramics were investigated. It was found that the grain size of 99BeO ceramics could be controlled by the multistep sintering method, and the thermal conductivity could be elevated via two-step sintering method. Moreover, the technique parameters of the twostep sintering method, such as the highest sintering temperature (T₁), the final sintering temperature (T₂) and holding time (t),were studied in detail. The results show that under the condition of T₁=1630℃, T₂=1550℃ and t=4h, 99 BeO oxide ceramics owing fine grain and compact structure were obtained with the thermal conductivity of 308W/(m·K), and the density of 2.95g/cm³.

Key words: two-step sintering technique, high purity beryllium oxide ceramics (99BeO), thermal conductivity, density, grain size

CLC Number:

TQ174

ZHONG Chao-Wei,LIANG Jian,ZHANG Shu-Ren,ZHANG Shao-Hua,LI B. Effects of Sintering Techniques on the Microstructure and Performance of High Purity Beryllium Oxide Ceramics[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2010.00415.

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Effects of Sintering Techniques on the Microstructure and Performance of High Purity Beryllium Oxide Ceramics

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