Rearrangement Process in the Initial Stage Sintering of Vapor Phase Decomposed Alumina

Shuzo Kato, T. Iga, Hiromi Sarai
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Abstract

An apparent activation energy for the rearrangement process in the initial stage of sintering was determined in the temperature range from 1400° to 1600°C on vapor phase decomposed alumina.The slopes of log-log plots for the shrinkage of this alumina were unity. From this result it was concluded that the rearrangement process occurred in the early stage of sintering. The apparent activation energy for the process was 45kcal/mol. This value was far lower than that obtained for various diffusion processes.
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气相分解氧化铝初期烧结的重排过程
在1400 ~ 1600℃的温度范围内,测定了气相分解氧化铝烧结初期重排过程的表观活化能。该氧化铝收缩的对数对数曲线的斜率是一致的。结果表明,重排过程发生在烧结初期。反应的表观活化能为45kcal/mol。这一数值远低于各种扩散过程得到的数值。
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