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

FIELD: ceramic industry.

SUBSTANCE: invention relates to glass ceramics, particularly to high-temperature radiotransparent glass-ceramic materials for SHF-devices, meant for manufacturing of radio-tracking means used in aerospace and rocket engineering and production of electronic engineering articles, mainly, phase changers, controlled grid modules, etc. In the glass-ceramic material for SHF-devices, including SiO₂, Al₂O₃, MgO, TiO₂, CeO₂, CeO₂ there is used in the composition of poliryte with the following ratio , MP: SIO₂ 32.5-35.5; Al₂O₃ 21.5-24.5; MgO 8.0-10.0; TIO₂ 16.5-19.5; polyrite 14.5-17.5. Content of CeO₂ in polyrite constitutes 40-60 %, while the particle size is 0.8-1.2 um. Glass-crystalline materials are produced with preset and supported within certain limits values of dielectric permeability at low losses (3.5-4.5)×10^-4 in SHF-band (10¹⁰ Hz).

EFFECT: technical result of invention: simplification and improved quality of material surface machining due to more fine-grained structure and an increase in the amount of residual glass phase.

3 cl, 3 tbl