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The development prospects of high-strength transparent glass-crystalline materials on the basis of lithium disilicate for protection of optical systems are found to be closely related to their structural features. We formulate the main criteria for the synthesis of transparent pyroceramics, develop model glasses of the R2O–RO–RO2–R2O3–P2O5–SiO2 system with the ratio SiO2/Li2O = 4.0 and produce glass-crystalline...
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