Branched morphology of Nb powder particles fabricated by calciothermic reduction in CaCl2 melt

被引：3

作者：

Suzuki, Nobuyoshi ^{[1
]}

Suzuki, Ryosuke O. ^{[1
]}

Natsui, Shungo ^{[1
]}

Kikuchi, Tatsuya ^{[1
]}

机构：

[1] Hokkaido Univ, Fac Engn, Div Mat Sci & Engn, Kita Ku, Kita 13,Nishi 8, Sapporo, Hokkaido 0608628, Japan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2017年 / 110卷

关键词：

Calciothermic reduction; Niobium oxide; Powder morphology; Niobium powder; Molten salt; NIOBIUM POWDER; TANTALUM; CALCIUM; DEOXIDATION; OXIDE;

D O I：

10.1016/j.jpcs.2017.05.032

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new branched morphology of metallic niobium powder particles was produced by calciothermic reduction of niobium oxides in molten CaCl2. The influence of some reaction parameters on the powder particle morphology was studied, and the formation mechanism was investigated. It was found that the formation of intermediate complex niobium oxides (CaxNb2Oy) was crucial in the formation of niobium powder particles with the branched morphology. Based on this finding, the formation mechanism of the branched morphology in four stages was proposed. These Nb powder particles with microscopic branches can prevent particle sintering during the fabrication process of electric capacitors, allowing the latter to exhibit a higher capacitance.

引用

页码：58 / 63

页数：6

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