| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9781801 | Journal of Physics and Chemistry of Solids | 2005 | 5 Pages |
Abstract
Calciothermic reductions of Ta2O5 and Nb2O5 are proposed aiming at the fine powder preparation for the larger capacitance of condensers. Because the molten CaCl2 can coexist stably with metallic Ca, and because it can dissolve a few mol%Ca and about 20Â mol%CaO, the reductant Ca can be supplied to the oxide via molten CaCl2, and the reaction by-product CaO can be in situ eliminated from the reaction interface. The metallic powder was obtained after an hour at 1173Â K. In the prolonged time the particles sintered together, but oxygen was gradually removed to the level of a few thousands ppm.
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Authors
Masahiko Baba, Youhei Ono, Ryosuke O. Suzuki,