Radio-transparent strontium-anorthite ceramics modified with SrO–Al2O3–B2O3–SiO2 glass: synthesis, microstructure, thermal and physical properties

The article presents research results on radio-transparent strontium-anorthite ceramics, in which some components were introduced using eutectic glass of the SrO–Al₂O₃–SiO₂ pseudoternary system. During the firing process, the principle of reactive formation of the ceramic structure is realized. The resulting dense material was obtained at relatively low temperatures 1200 °C. The only crystalline phase of the developed ceramics is the monoclinic form of strontium anorthite, which forms a homogeneous structural matrix of the material. The developed strontium-anorthite ceramics are characterized by a low thermal linear expansion coefficient of (39.2–39.7)×10^− 7°C^-1, which ensures their high thermal stability (750 °C). The synthesized ceramics meet the requirements for high-frequency radio-transparent materials, including structural ones, with a relative dielectric permittivity of (5.1–5.3) and dielectric loss of 0.001 at a frequency of 10¹⁰ Hz.

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