Abstract
We have studied reaction between ZrCl4 and NaBH4 at temperatures between 300 and 725°C. The results demonstrate that single-phase zirconium diboride nanoparticles are formed starting at 575°C. According to electron microscopy data, the ZrB2 powder obtained at 575 and 725°C consists of variously shaped particles, some of which are almost spherical, ranging in diameter from ~10 to 20 and from 25 to 35 nm, respectively. These values agree with the equivalent particle diameters evaluated from the measured specific surface area of ZrB2, ~14 and ~32 nm, respectively, and with the crystallite size extracted from X-ray diffraction data: D hkl ~ 13 and 28 nm.
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Original Russian Text © S.E. Kravchenko, A.G. Burlakova, I.A. Domashnev, S.E. Nadkhina, N.N. Dremova, A.A. Vinokurov, S.P. Shilkin, 2017, published in Neorganicheskie Materialy, 2017, Vol. 53, No. 8, pp. 817–821.
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Kravchenko, S.E., Burlakova, A.G., Domashnev, I.A. et al. Formation of zirconium diboride nanoparticles as a result of reaction between zirconium tetrachloride and sodium borohydride. Inorg Mater 53, 804–808 (2017). https://doi.org/10.1134/S002016851708009X
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DOI: https://doi.org/10.1134/S002016851708009X