Two-step sintering of fine alumina-zirconia ceramics

Chih Jen Wang, Chi Yuen Huang, Yu Chun Wu

研究成果: Article同行評審

105 引文 斯高帕斯(Scopus)

摘要

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 °C is effective for the first step sintering (T1) due to its highest densification rate. The isothermal sintering is then carried out at 1350-1400 °C (T2) 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 μm) is achieved.

原文English
頁(從 - 到)1467-1472
頁數6
期刊Ceramics International
35
發行號4
DOIs
出版狀態Published - 2009 五月

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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