期刊
CERAMICS INTERNATIONAL
卷 35, 期 4, 页码 1467-1472出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2008.08.001
关键词
Grain growth; Sintering; Inclusions; Alumina
资金
- Ministry of Economic Affairs in Taiwan [96-EC-17-A-08-S1-023]
This work investigates the feasibility to the fabrication of high density of fine alumina-5 wt.% zirconia ceramics by two-step sintering process. First step is carried out by constant-heating-rate (CHR) sintering in order to obtain an initial high density and a second step is held at a lower temperature by isothermal sintering aiming to increase the density without obvious grain growth. Experiments are conducted to determine the appropriate temperatures for each step. The temperature range between 1400 and 1450 degrees C is effective for the first step sintering (T-1) due to its highest densification rate. The isothermal sintering is then carried out at 1350-1400 degrees C (T-2) for various hours in order to avoid the surface diffusion and improve the density at the same time. The content of zirconia provides a pinning effect to the grain growth of alumina. A high ceramic density over 99% with small alumina size controlled in submicron level (0.62-0.88 mu m) is achieved. (C) 2008 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据