Electron magnetic resonance investigation of chromium diffusion in yttria powders

被引：1

作者：

de Biasi, R. S. ^{[1
]}

Grillo, M. L. N. ^{[2
]}

机构：

[1] Inst Mil Engn, Secao Engn Mecan & Mat, BR-22290270 Rio De Janeiro, Brazil

[2] Univ Estado Rio de Janeiro, Inst Fis, BR-20550013 Rio De Janeiro, Brazil

来源：

PHYSICA B-CONDENSED MATTER | 2010年 / 405卷 / 05期

关键词：

Yttrium oxide; Chromium; Diffusion; Electron magnetic resonance; SOLID-SOLUTIONS; SPIN-RESONANCE; CR3+ DIFFUSION;

D O I：

10.1016/j.physb.2009.11.062

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The electron magnetic resonance (EMR) technique was used to investigate the diffusion of chromium in yttria (Y2O3) powders. The EMR absorption intensity was measured for several annealing times and three different temperatures of isothermal annealing: 1273, 1323 and 1373 K. The activation temperature for diffusion, calculated from the experimental data using a theoretical model based on the Fick equation, was found to be E-A=342 +/- 5 kJ mol(-1). This value is larger than the activation energy for the diffusion of chromium in rutile (TiO2), periclase (MgO) and cobalt monoxide (CoO) and smaller than the activation energy for the diffusion of chromium in chrysoberyl (BeAl2O4). (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1267 / 1268

页数：2

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