Constrained densification in boehmite–alumina mixtures for the fabrication of porous alumina ceramics

被引:0
作者
S. Kwon
G. L. Messing
机构
[1] Pennsylvania State University,Department of Materials Science and Engineering and The Particulate Materials Centre
来源
Journal of Materials Science | 1998年 / 33卷
关键词
Polymer; Alumina; Porosity; Shrinkage; Mechanical Strength;
D O I
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学科分类号
摘要
It is demonstrated that inherent constrained densification characteristics of the bimodal size distributed powders can be utilized to fabricate porous alpha alumina. Seeded boehmite was mixed with coarse alpha alumina particles to produce various compositions of bimodal mixtures. The densification behaviour of the mixtures was correlated with shrinkage and microstructural evolution. The mixtures sintered at 1200 °C contained more than 30% porosity and the mechanical strength of the mixtures was increased by 2–4 fold relative to the coarse particles alone with similar porosity (<5 MPa). © 1998 Chapman & Hall
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页码:913 / 921
页数:8
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