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Formation of niobium boride from NB2O5 and boron with plasma arc

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Abstract

When a mixture of Nb2O5 and boron is heated to about 3000°C and subsequently annealed at about 2000°C in an argon plasma arc, NbB2 is obtained. The products are found to be superconductors, theT cof which is higher than 4 K. Some properties of the products, such as Vickers hardness and density, are comparable with those of NbB2 prepared from niobium and boron. In the reaction forming NbB2, a white powder is also obtained. The powder is identified as H3BO3 and is formed by the reaction between BO and water in the atmosphere. Therefore, the reaction of NbB2 formation can be written as Nb2O5+9B=2NbB2+5BO.

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Authors and Affiliations

  1. Department of Chemistry, College of Science and Engineering, Aoyama Gakuin University, Chitosedai, Setagaya, 157, Tokyo, Japan

    Osamu Matsumoto, Yasuo Shioiri & Yasushi Kanzaki

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  1. Osamu Matsumoto
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  2. Yasuo Shioiri
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  3. Yasushi Kanzaki
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Matsumoto, O., Shioiri, Y. & Kanzaki, Y. Formation of niobium boride from NB2O5 and boron with plasma arc. Plasma Chem Plasma Process 2, 247–253 (1982). https://doi.org/10.1007/BF00566523

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  • DOI: https://doi.org/10.1007/BF00566523

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