Oxygen self-diffusion in cylindrical single-crystal mullite

被引：25

作者：

Ikuma, Y ^{[1
]}

Shimada, E

Sakano, S

Oishi, M

Yokoyama, M

Nakagawa, ZE

机构：

[1] Kanagawa Inst Technol, Kanagawa 2430292, Japan

[2] Akita Univ, Fac Engn & Resource Sci, Akita 0108502, Japan

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1999年 / 146卷 / 12期

关键词：

D O I：

10.1149/1.1392692

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A mixture of SiO2 and Al2O3 was prepared from metal alkoxides and fired at 1650 degrees C to form mullite and an SiO2-rich glass phase.. After leaching out the glass phase, crystalline mullite powder was obtained. Transmission electron microscopy examination revealed the powder to be cylindrical particles of single-crystal mullite. A diffusion experiment was performed on the mullite to determine the oxygen diffusion coefficient. This could be expressed as D-oxy = 1.32 x 10(-6) exp[-397 kJ/RT] m(2) s(-1) in the range of 1100 to 1300 degrees C. This falls along the line extended through the oxygen diffusion coefficient of forsterite, which is similar in crystal structure to mullite. (C) 1999 The Electrochemical Society. S0013-4651(99)04-050-1. All rights reserved.

引用

页码：4672 / 4675

页数：4

共 20 条

[1]

AKSAY IA, 1973, AM CERAM SOC BULL, V52, P710

[2] MULLITE FOR STRUCTURAL, ELECTRONIC, AND OPTICAL APPLICATIONS [J].