MATERIAL FOR THE PRODUCTION OF JEWELRY AND JEWELRY STONES WITH HIGH REFRACTIVE INDICATOR AND HIGH HEAT RESISTANCE

摘要

the glass material for the production of biu017euternu00edch and u0161perkovu00fdch stones with high refractive index and high heat resistance.which is made up of high silicate glass containing aluminate rare earth oxides and carbon niobiu010dnu00e9ho with a refractive index of at least 1.65 and dispersions containing higher than 0012: 0 to 30% by weight.sio2, 10 to 50% by weight. al2o3, 20 to 70% by weight. yttria) (y2o3 + la2o3, 0.1 to 20% by weight. nb2o5.