Features of Segregation of the Oxide Phase during Sintering of Tantalum Powders with a Large Specific Surface

V. M. Orlov; Орлов В. М.; T. Yu. Prokhorova; Прохорова Т. Ю.; V. V. Semushin; Семушин В. В.

doi:10.31857/S0044185623700353

Features of Segregation of the Oxide Phase during Sintering of Tantalum Powders with a Large Specific Surface

Autores: Orlov V.M.¹, Prokhorova T.Y.¹, Semushin V.V.¹
Afiliações:
1. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center, Russian Academy of Sciences, 184209, Apatity, Russia
Edição: Volume 59, Nº 3 (2023)
Páginas: 318-323
Seção: НОВЫЕ ВЕЩЕСТВА, МАТЕРИАЛЫ И ПОКРЫТИЯ
URL: https://vestnik.nvsu.ru/0044-1856/article/view/663884
DOI: https://doi.org/10.31857/S0044185623700353
EDN: https://elibrary.ru/SFHOSW
ID: 663884

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Resumo

The effect of the oxygen content in tantalum powders of different natures on the leakage currents of capacitor anodes has been examined. It has been established that the leakage current in the anodes from magnesium thermal powders with a highly developed surface depends on the oxygen content in them more weakly than in anodes from powders consisting of fragmented particles, which have a smaller surface area. This is explained by the fact that, during sintering of the anodes from powders with a large specific surface, the majority of the oxygen of the natural oxide interacts with the metal with the formation of Ta2O5 particles outside the tantalum particle volume.

Palavras-chave

tantalum powder, specific surface area, capacitor anode, sintering, tantalum pentoxide, leakage current

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