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Synthesis of LaB6–ZrB2 Powder Mixture by Borothermal Reduction of La(OH)3 and ZrO(OH)2 Coprecipitated in Boron Suspension

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Refractories and Industrial Ceramics Aims and scope

Eutectic LaB6–ZrB2 powder was synthesized by borothermal reduction of an La(OH)3–ZrO(OH)2 mixture under vacuum with isothermal curing at 1200 – 1600°C. The mixture of hydroxides was prepared via coprecipitation from aqueous solutions of La and Zr nitrates in a suspension of amorphous boron. The effect of an excess of B on the phase and elemental compositions of the boride mixture was studied. The particle size of the obtained powders depended on the synthesis temperature.

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Acknowledgement

The work was sponsored by an RFBR Grant, Project No. 18-33-20221 mol_a_ved.

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Authors and Affiliations

  1. Prometei CRSI of Structural Materials, Kurchatov Institute SRC, St. Petersburg, Russia

    D. D. Nesmelov, O. A. Kozhevnikov, S. V. Vikhman, E. S. Novoselov & I. V. Shatalkina

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  1. D. D. Nesmelov
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  2. O. A. Kozhevnikov
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  3. S. V. Vikhman
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  4. E. S. Novoselov
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Correspondence to D. D. Nesmelov.

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Translated from Novye Ogneupory, No. 8, pp. 38 – 43, August, 2019.

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Nesmelov, D.D., Kozhevnikov, O.A., Vikhman, S.V. et al. Synthesis of LaB6–ZrB2 Powder Mixture by Borothermal Reduction of La(OH)3 and ZrO(OH)2 Coprecipitated in Boron Suspension. Refract Ind Ceram 60, 389–393 (2019). https://doi.org/10.1007/s11148-019-00373-3

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  • DOI: https://doi.org/10.1007/s11148-019-00373-3

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