Abstract—
Ca0.75 + 0.5xZr1.5Fe0.5(PO4)3 –x(SiO4)x (x = 0–0.5) solid solutions have been synthesized by a sol–gel process and characterized by X-ray diffraction, IR spectroscopy, and differential scanning calorimetry. As expected, the synthesized phosphatosilicates crystallize in a NaZr2(PO4)3-type structure (trigonal symmetry, sp. gr. R\(\bar {3}\)c). The thermal expansion of the solid solutions has been studied by high-temperature X-ray diffraction in the temperature range from 25 to 800°C. Their thermal expansion parameters have been calculated and analyzed as functions of composition. High-density ceramics based on the Ca0.875Zr1.5Fe0.5(PO4)2.75(SiO4)0.25 phosphatosilicate have been produced by spark plasma sintering and their structure and properties have been studied in detail.
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ACKNOWLEDGMENTS
This work was supported by the Russian Science Foundation, project no. 16-13-10464: Advanced ceramic like mineral materials with improved and adjustable service characteristics: design, synthesis, study.
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Savinykh, D.O., Khainakov, S.A., Boldin, M.S. et al. Preparation of NZP-Type Ca0.75 + 0.5xZr1.5Fe0.5(PO4)3 –x(SiO4)x Powders and Ceramic, Thermal Expansion Behavior. Inorg Mater 54, 1267–1273 (2018). https://doi.org/10.1134/S0020168518120154
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DOI: https://doi.org/10.1134/S0020168518120154