GLASS-CERAMIC MATERIAL FOR MICROWAVE ENGINEERING Russian patent published in 2013 - IPC C03C10/00 

FIELD: chemistry.

SUBSTANCE: invention relates to glass ceramics, particularly to high-temperature radiotransparent glass-ceramic materials for microwave engineering, meant for making radio tracking equipment in aerospace and rocket engineering. The glass-ceramic material for microwave engineering contains SiO₂, Al₂O₃, TiO₂, MgO and SiO₂ in form of plated TiO₂ aerosil, with the following ratio of components, wt %: SiO₂ - 35.5-38.3; SiO₂ in form of plated TiO₂ aerosil - 0.1; Al₂O₃ - 22.8-25.5; TiO₂ - 16.1-18.8; MgO - 20.0-22.8.

EFFECT: low thermal coefficient of linear expansion, stable permittivity and loss-angle tangent, high ultimate under centrally symmetric bending.

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