Effect of adding nanocrystalline γ-Al2O3 on sintering behavior of alumina fibers

被引：0

作者：

He, JL ^{[1
]}

Diao, YQ ^{[1
]}

Yu, DL ^{[1
]}

Tian, YJ ^{[1
]}

Li, DC ^{[1
]}

机构：

[1] Yanshan Univ, Coll Mat Sci & Chem Engn, Qinhuangdao 066004, Peoples R China

来源：

JOURNAL OF INORGANIC MATERIALS | 2000年 / 15卷 / 02期

关键词：

Al2O3; fiber; gamma-Al2O3 nanosized powder; sinter;

D O I：

暂无

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of adding nanocrystalline gamma-Al2O3 powders on the sintering behavior of alumina fibers was investigated. The nanocrystalline powders will be stuffed into the pores formed from the packing of micron-sized alumina powders when the fiber is extruded. In the case of 40% nanocrystalline gamma-Al2O3 in the mixed powders, the relative green density increases from 65% to 80%. The fiber can be sintered to near theoretical density at relatively low temperature because it is of higher density, narrower pore size distribution and smaller mean pore size. The diametric shrinkage of the fibers extruded from the nanocrystelline gamma-Al2O3 is higher than that made from micron-sized powders. gamma-Al2O3 phase is transformed to alpha-Al2O3 during sintering process.

引用

页码：331 / 335

页数：5