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j.jpcs.2014.11.014.pdf | 1.51 MB | Adobe PDF | 見る/開く |
タイトル: | Niobium powder synthesized by calciothermic reduction of niobium hydroxide for use in capacitors |
著者: | Baba, Masahiko Kikuchi, Tatsuya Suzuki, Ryosuke O. |
著者名の別形: | 鈴木, 亮輔 |
キーワード: | Electronic materials Elements Electrical properties Crystal growth Chemical synthesis |
発行日: | Mar-2015 |
出版者: | Elsevier Ltd. |
誌名: | Journal of Physics and Chemistry of Solids |
巻: | 78 |
開始ページ: | 101 |
終了ページ: | 109 |
抄録: | 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. |
著作権等: | © 2014 Elsevier Ltd. 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。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/193298 |
DOI(出版社版): | 10.1016/j.jpcs.2014.11.014 |
出現コレクション: | 学術雑誌掲載論文等 |
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