Microstructural development in nanocrystalline MgH2 during H-absorption/desorption cycling

被引：32

作者：

Fatay, D.

Spassov, T.

Delchev, P.

Ribarik, G.

Revesz, A.

机构：

[1] Eotvos Lorand Univ, Dept Mat Phys, H-1518 Budapest, Hungary

[2] Univ Sofia St Kl Ohridski, Dept Chem, BU-1126 Sofia, Bulgaria

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2007年 / 32卷 / 14期

基金：

匈牙利科学研究基金会;

关键词：

nanocrystalline; MgH2; hydrogen sorption; X-ray line profile analysis;

D O I：

10.1016/j.ijhydene.2006.12.018

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：

Repeated dehydriding/hydriding cycles of ball-milled nanocrystalline MgH2 powders were carried out in a Sievert's-type apparatus. The microstructural changes during cycling were characterized by X-ray diffraction. Using the convolutional multiple whole profile fitting procedure, several microstructural parameters, i.e. the average grain size and the grain-size distribution of the as-milled and treated samples were determined. Based on the shrinking core model, the significant difference between the microstructures obtained after the first and repeated cyclings was explained. (c) 2007 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

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页码：2914 / 2919

页数：6

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