Glass-ceramics suitable for ring laser gyros

摘要

This invention relates to the production of transparent glass-ceramic bodies exhibiting properties especially suitable for use in ring laser gyros. The inventive products contain beta -quartz solid solution as essentially the sole crystal phase and consist essentially, expressed in terms of weight percent on the oxide basis, of -SiO2 64-67 ZnO 0.7-4.2 -Al2O3 21-24 TiO2 2.0-3.25 -Li2O 2.6-3.7 ZrO2 1.25-2.5 -MgO 0.8-1.5 TiO2 + ZrO2 4-5.25 -