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Crystallization of glasses in the SrO-B2O3 system

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Abstract

The crystallization of strontium borate glasses containing 16.7–43.0 mol % SrO is investigated. New crystalline compounds of the hypothetical compositions 2SrO · 3B2O3 (metastable) and SrO · 5B2O3 (stable below 750°C), as well as the metastable diborate modification β-SrO · 2B2O3, are revealed, and their X-ray powder diffraction data are obtained. It is demonstrated that, with a deficit of strontium oxide, the 4SrO · 7B2O3 compound forms solid solutions. Strontium triborate SrO · 3B2O3, which was previously prepared only through the dehydration of crystal hydrates, is produced using crystallization of glasses. The thermal stability of this compound is studied. The influence of the dispersity on the stability of different crystalline phases is discussed. Variants of the phase diagram for the SrO · B2O3-B2O3 system in the case of monolithic and dispersed samples are proposed from analyzing the experimental results and the data available in the literature.

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Authors and Affiliations

  1. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, nab. Makarova 2, St. Petersburg, 199034, Russia

    I. G. Polyakova & E. O. Litovchik

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  1. I. G. Polyakova
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  2. E. O. Litovchik
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Correspondence to I. G. Polyakova.

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Original Russian Text © I.G. Polyakova, E.O. Litovchik, 2008, published in Fizika i Khimiya Stekla.

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Polyakova, I.G., Litovchik, E.O. Crystallization of glasses in the SrO-B2O3 system. Glass Phys Chem 34, 369–380 (2008). https://doi.org/10.1134/S1087659608040056

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