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

页码：209 / 214

页数：6