GLASS-CERAMIC MATERIAL Russian patent published in 2016 - IPC C03C10/08 

FIELD: technological processes.

SUBSTANCE: invention relates to production of high-temperature radiotransparent glass-crystalline materials in non-alkali magnesium-aluminosilicate system with titanium and zirconium oxides as a crystallisation catalyst. Glass-ceramic material, including SiO₂, Al₂O₃, MgO, TiO₂, additionally comprises nanopowder or hydrosol of a binary compound TiO₂·ZrO₂ at following component ratio, wt%: SiO₂ - 42.0-52.5; Al₂O₃ - 24.0-30.4; MgO - 9.0-12.0; TiO₂ - 4.8-12.9; TiO₂·ZrO₂ in form of nanopowder or hydrosol TiO₂·ZrO₂ - 1.7-8.2. Temperature of melting glass is (1550±10)°C, maximum crystallisation temperature (1,250-1,320)°C.

EFFECT: high temperature of deformation while maintaining high radio-transparency, low thermal coefficient of linear expansion and melting temperature.

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