Validation of a kinetic model of diffusion for complete oxidation of bismuth powder: influence of granulometry and temperature

被引：9

作者：

Machado, C ^{[1
]}

Aidel, S ^{[1
]}

Elkhatib, M ^{[1
]}

Delalu, H ^{[1
]}

Metz, R ^{[1
]}

机构：

[1] Univ Lyon 1, CNRS, FRE 2397, Lab Hydrazines & Procedes, F-69622 Villeurbanne, France

来源：

SOLID STATE IONICS | 2002年 / 149卷 / 1-2期

关键词：

oxidation; kinetic; bismuth; powder; diffusion;

D O I：

10.1016/S0167-2738(02)00133-9

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：

The kinetics of complete oxidation of bismuth powder by air has been investigated by thermogravimetric studies under isothermal conditions in the range 729-968 K. Particles size was chosen in the 35-375-mum range. We have been able to carry out the full oxidation of the powder far above the bismuth metal melting point (544.3 K) without coalescence of the particles. A quantitative interpretation based on the diffusion of reactants through the oxide layer has been proposed. The activation energy calculated from the Arrhenius law is close to 139 kJ mol(-1). (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：147 / 152

页数：6