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Calcium Vapor Reduction of Tantalum Oxide Compounds

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Inorganic Materials Aims and scope

Abstract—

Calcium vapor reduction of Ta2O5 and Mg4Ta2O9 has been studied at temperatures from 750 to 850°C. We have found out specific features of the pore structure of the calciothermic tantalum powders and assessed the effect of precursor particle size on the degree of reduction. To reduce the Mg4Ta2O9 tantalate with an average particle size of 2 μm, holding at a temperature of 800°C for at least 4 h was needed. Reducing the average particle size to 0.15 μm allowed us to reach complete reduction at a temperature of 750°C in just 1 h.

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Authors and Affiliations

  1. Tananaev Institute of Chemistry and Technology of Rare Elements and Minerals (separate subdivision), Kola Scientific Center (Federal Research Center), Russian Academy of Sciences, 184209, Apatity, Murmansk oblast, Russia

    V. M. Orlov & M. V. Kryzhanov

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  1. V. M. Orlov
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  2. M. V. Kryzhanov
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Correspondence to V. M. Orlov.

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Orlov, V.M., Kryzhanov, M.V. Calcium Vapor Reduction of Tantalum Oxide Compounds. Inorg Mater 59, 481–486 (2023). https://doi.org/10.1134/S0020168523050126

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