Glass-ceramic materials in the systems SiO2–Al2O3–RO (RO — MgO, SrO, BaO, and their combinations) were synthesized by the sol-gel method. The factors influencing the sol-gel formation process educed. The effect of the composition and temperature-time regimes of heat treatment on the crystallization properties of gels, phase transformations, phase composition, granulometry, and shape of the resulting particles was investigated. The nature of the phase transformations occurring in powders was educed as a function of the temperature- time conditions of heat treatment. It is shown that, depending on the composition, anorthite or its solid solutions are the dominant crystalline phases, and their formation temperatures were determined: hexagonal celsian at 1350°C, monoclinic strontium anorthite at 1400°C, and cordierite at 1450°C. The effect of pressing and heat treatment on the physicomechanical, dielectric, and thermal properties of the obtained materials was investigated.
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Translated from Steklo i Keramika, No. 4, pp. 3 – 15, April, 2022.
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Shchegoleva, N.E., Lebedeva, Y.E., Voronov, V.A. et al. Sol-Gel Production of Alkaline-Free Aluminosilicate Glass Ceramic and Investigation of its Properties. Glass Ceram 79, 121–129 (2022). https://doi.org/10.1007/s10717-022-00468-3
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DOI: https://doi.org/10.1007/s10717-022-00468-3