Effects of ball-milling conditions and additives on the hydrogen sorption properties of Mg+5 wt% Cr2O3 mixtures

被引：7

作者：

Bobet, J-L. ^{[1
]}

Kandavel, M.

Ramaprabhu, S.

机构：

[1] Univ Bordeaux 1, CNRS, UPR 9048, ICMCB, F-33608 Pessac, France

[2] Indian Inst Technol, Dept Phys, Alternate Energy Technol & Magnet Mat Lab, Madras 600036, Tamil Nadu, India

来源：

JOURNAL OF MATERIALS RESEARCH | 2006年 / 21卷 / 07期

关键词：

D O I：

10.1557/JMR.2006.0206

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effects of particle size of Cr2O3 catalyst on the hydrogen absorption/desorption kinetics of Mg + 5 wt% Cr2O3 mixtures have been studied. To explain the effect of particle size of Cr2O3 and also to yield information about the role of Cr2O3 during the sorption process, the kinetics data have been analyzed using Avrami-Erofeev rate equations. The activation energies and diffusion coefficients of these mixtures are in the ranges of 50.6-63.2 kJ/mol and 1.2.10(-11) to 8.9.10(-10) cm(2)/S, respectively. The addition of nano-oxides led to an increase of the diffusion coefficient of hydrogen by one order of magnitude.

引用

页码：1747 / 1752

页数：6

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