CRYSTALLIZATION PROCESSES IN BORON-CONTAINING AND HYDROGEN-CONTAINING ULTRAFINE POWDERS

被引：18

作者：

DRAGIEVA, I ^{[1
]}

RUSEV, KR ^{[1
]}

STANIMIROVA, M ^{[1
]}

机构：

[1] BULGARIAN ACAD SCI,INST MET SCI,BU-1040 SOFIA,BULGARIA

来源：

JOURNAL OF THE LESS-COMMON METALS | 1990年 / 158卷 / 02期

关键词：

D O I：

10.1016/0022-5088(90)90064-Q

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 crystallization processes in ultrafine amorphous boron- and hydrogen-containing powders obtained by high-rate synthesis with sodium borohydride in solutions have been investigated. The boron and hydrogen contents are found to depend on the pH value of the solutions and the anionic surroundings of the ion clusters. The maximum crystallization temperature increases depending on the boron content and the heat evolution sharply decreases with the hydrogen content in the samples. The maximum heat evolution of the crystallization is registered with equal numbers of boron and hydrogen atoms as nearest neighbours of the metal atoms in the metal lattice. © 1990.

引用

页码：295 / 299

页数：5

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