Branched morphology of Nb powder particles fabricated by calciothermic reduction in CaCl2 melt
Branched morphology of Nb powder particles fabricated by calciothermic reduction in CaCl2 melt
复制标题
CaCl2 熔体中热热还原制备 Nb 粉末颗粒的支化形貌
DOI：
10.1016/j.jpcs.2017.05.032
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发表时间：
2017
影响因子：
4
通讯作者：
Kikuchi Tatsuya
中科院分区：
文献类型：
--
作者：
Suzuki Nobuyoshi;Suzuki Ryosuke O.;Natsui Shungo;Kikuchi Tatsuya
通过在熔融CaCl2中钙热还原铌氧化物，制备出新型枝状形态的金属铌粉颗粒。研究了反应参数对粉末颗粒形貌的影响，并探讨了粉末颗粒的形成机理。结果表明，在铌粉颗粒呈树枝状形貌的过程中，中间复合氧化铌（CaxNb2Oy）的形成是关键。在此基础上，提出了四个阶段分枝形态的形成机理。这些具有微观分支的Nb粉末颗粒可以防止电容器制造过程中的颗粒烧结，从而使后者表现出更高的电容。
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.