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dc.contributor.authorBaba, Masahikoja
dc.contributor.authorKikuchi, Tatsuyaja
dc.contributor.authorSuzuki, Ryosuke O.ja
dc.contributor.alternative鈴木, 亮輔ja
dc.description.abstractMetallic 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.ja
dc.publisherElsevier Ltd.ja
dc.rights© 2014 Elsevier Ltd.ja
dc.rightsThis is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。ja
dc.subjectElectronic materialsja
dc.subjectElectrical propertiesja
dc.subjectCrystal growthja
dc.subjectChemical synthesisja
dc.titleNiobium powder synthesized by calciothermic reduction of niobium hydroxide for use in capacitorsja
dc.type.niitypeJournal Articleja
dc.identifier.jtitleJournal of Physics and Chemistry of Solidsja
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