Access count of this item: 162
|Title:||Niobium powder synthesized by calciothermic reduction of niobium hydroxide for use in capacitors|
Suzuki, Ryosuke O.
|Author's alias:||鈴木, 亮輔|
|Journal title:||Journal of Physics and Chemistry of Solids|
|Abstract:||Metallic niobium powder was produced for applications in electric capacitors via calciothermic reduction of niobium hydroxide in molten CaCl2. Sub-micrometer spherical metallic particles with coral-like morphologies reflected the particle size of the starting oxide powder. A fine powder was obtained from the mixtures of niobium hydroxide and CaO or Ca(OH)2, respectively. Sintered pellets of the metallic powder showed a higher capacitance (CV) than those of the simply reduced powder without pre-treatment, because the shrinkage during sintering was smaller. The CV was as large as that of commercially sintered pellets for tantalum capacitors. Therefore, this niobium powder would act as a higher-voltage capacitor by applying chemical anodic treatment at higher voltages, and lower oxygen content in the reduced power could realize a lower leak current.|
|Rights:||© 2014 Elsevier Ltd.|
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|Appears in Collections:||Journal Articles|
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