MIXTURE FOR PRODUCING GLASS-CERAMIC COMPOSITE MATERIAL Russian patent published in 2020 - IPC C03C10/00 C04B35/111 

FIELD: glass.

SUBSTANCE: invention relates to production of glass-ceramic composite material and can be used in electrical and radio engineering industry, in production of housings and substrates for integrated circuits and multilayer ceramic boards of multi-crystal ceramic modules (MCM). Charge of glass-ceramic material contains low-temperature crystallising glass and alumina ceramic at ratio (1.4–1.0):(0.6–1.0) respectively, a low temperature crystallizing glass further contains yttrium oxide (Y₂O₃) and/or lanthanum (La₂O₃) in the following ratio, wt. %: silicon oxide (SiO₂) 20–34, barium oxide (BaO) 34–40, boron oxide (B₂O₃) 23–26, calcium oxide (CaO) 1–10, tin oxide (SnO₂) 1–10, as well as over 100 %: Y₂O₃ and/or La₂O₃ 2–5, Al₂O₃ 5–10. In order to expand technological capabilities of the method, aluminium oxide (Al₂O₃) and yttrium oxide (Y₂O₃) and/or lanthanum (La₂O₃) prior to composition of charge and mixing with the rest components of glass are preliminary mixed with each other and calcined at temperature 1300–1400 °C.

EFFECT: technical result of the invention is improved electrical insulation properties of the material.

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