Effects of Solid Loading in Initial Slurry on Microstructure and Properties of Porous Mullite Ceramics

被引：0

作者：

Li Yutao ^{[1
]}

Wang Chang'an ^{[1
]}

Zhao Chenchen ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2011年 / 40卷

关键词：

mullite; porous ceramics; pore structure; compressive strength; thermal conductivity; FABRICATION;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Porous mullite ceramics were prepared by gel-casting process with tert-butyl alcohol (TBA) as solvent. The effects of solid loading in initial slurry on microstructure, porosity, pore size distribution, compressive strength and thermal conductivity at room temperature were investigated. The results show that the porosity and open porosity of the porous mullite ceramics are in the range of 54.9%-61.2% and 50.8%-55.5%, respectively; pore size distribution curves show uniform and single-peak distribution and the mean pore size is in the range of 2.34-3.52 mu m; with the increase of solid loading, the shrinkage of the mullite green body during sintering is decreased, the porosity decreased, but the compressive strength and the thermal conductivity of the mullite ceramics are increased obviously. The maximum compressive strength reaches 59.5 MPa and the lowest thermal conductivity at room temperature reaches 0.408 W/m.K.

引用

页码：540 / 543

页数：4

共 9 条

[1] Thermal conductivity of highly porous mullite material [J].