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GLASS WITH HIGH REFRACTIVE INDEX

2025-07-29 18:442650下载
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PROBLEM TO BE SOLVED : To provide a glass that has a high refractive index and high liquid phase viscosity without including a large amount of expensive rare earth oxides and others. SOLUTION : The present invention provides a glass with a high refractive index which has a glass composition containing, by mass%, SiO2+Al2O3+B2O3 : 30.5-80%, MgO+CaO+SrO+BaO+ZnO : 10-60%, BaO : 4-40%, TiO2+ZrO2 : 0-20%, and P2O5 : 0.01-15%, and has a refractive index (nd) of 1.51-2.0. The present invention provides a glass with a high refractive index which does not substantially comprise PbO or alkali metal oxides. The present invention provides a glass with a high refractive index which has a liquid phase viscosity of 103.0 dPa s or more. SELECTED DRAWING : None COPYRIGHT : (C)2016, JPO&INPIT


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