Thermal decomposition behavior of calcium borohydride Ca(BH4)2

被引：102

作者：

Kim, Jae-Hun ^{[1
]}

Jin, Seon-Ah ^{[1
,2
]}

Shim, Jae-Hyeok ^{[1
]}

Cho, Young Whan ^{[1
]}

机构：

[1] Korea Inst Sci & Technol, Mat Sci & Technol Res Div, Seoul 136791, South Korea

[2] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151742, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 461卷 / 1-2期

关键词：

hydrogen storage materials; phase transitions; thermochemistry; X-ray diffraction; thermal analysis;

D O I：

10.1016/j.jallcom.2007.07.097

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 thermal decomposition behavior of adduct-free Ca(BH4)(2), prepared by heating Ca(BH4)(2)center dot 2THF powder under vacuum, was investigated by X-ray diffraction and thermal analyses. It has been found that Ca(BH4)(2) undergoes a polymorphic transformation at 440 K and eventually decomposes in two steps between 620 and 770 K. CaH2 and an unknown intermediate compound form after the first step, but CaH2 is the only crystalline phase observed after the second step with a total weight loss of about 9.0 wt.%. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：L20 / L22

页数：3

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