PREPARATION AND CHARACTERIZATION OF TEXTURED POLYCRYSTALLINE NA AND K-BETA''-BETA-ALUMINAS

被引：6

作者：

TAN, A

KUO, CK

NICHOLSON, PS

机构：

[1] Ceramic Engineering Research Group, Department of Materials Science and Engineering, McMaster University, Hamilton

来源：

SOLID STATE IONICS | 1990年 / 42卷 / 3-4期

关键词：

D O I：

10.1016/0167-2738(90)90013-H

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polycrystalline samples of Na, K-β″ β-aluminas with a c0-textured microstructure have been successfully produced. Very fine, high-aspect-ratio, freeze-dried powder was pressed into thin disks and sintered. The high degree of preferential orientation in the resultant ceramics was revealed by XRD and SEM examination. A significant difference of electric conductivity between directions perpendicular and parallel to the pressing direction was determined by ac impedance spectroscopy, i.e., 2.7×10-6Ω-1 cm-1 and 2.2×10-4Ω-1 cm-1 respectively at 25°C for K-β″ β-aluminas. © 1990.

引用

页码：233 / 241

页数：9

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