Control of porosity and pore size for porous alumina prepared from α-alumina, BaSO4 and/or SrSO4

被引：0
|
作者：
Beppu, Y
Ando, M
Ohji, T
机构：
[1] FCRA, Synergy Ceram Lab, Moriyama Ku, Nagoya, Aichi 4638687, Japan
[2] Natl Ind Res Inst Nagoya, Nagoya, Aichi 4638687, Japan
来源：
INTERNATIONAL JOURNAL OF MATERIALS & PRODUCT TECHNOLOGY | 2001年
关键词：
alumina; beta-alumina; porous material; sulfate;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel fabrication method for porous alumina ceramics was introduced. Porous Ba beta-alumina and Sr beta-alumina were fabricated using alpha-alumina, BaSO4 and/or SrSO4 as starting materials. Two heating steps and a leaching process are applied to attain high porosity. The first heating was for sintering and transformation of alpha-alumina to beta-alumina, and the second was for melting of sulfate and evaporation of SOx. Porosity reached about 55% and 75% for 40 vol% and 50 vol% sulfate added samples regardless of sulfate species. Mean diameter increased with the increase of the porosity for BaSO4 SrSO4, and (BaSO4 + SrSO4) systems. Pore size distribution of all the samples displayed relatively sharp mono-peak mode. Maximum pore size of all systems were smaller than those of raw sulfates.
引用
收藏
页码：209 / 214
页数：6
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