| 摘要 |
Provided is a glass with which it is possible to enhance the efficiency of extraction of light generated in an organic EL element or the like, the glass having exceptional chemical resistance and devitrification resistance. Glass characterized by containing, by mass%, 25-50% of SiO2, 0.1-8% of Al2O3, 0.1-15% of B2O3, 0.1-50% of BaO, 2.1-15% of TiO2, and 0.1-15% of La2O3, the glass containing essentially no PbO, Na2O + K2O being 5% or less, and (TiO2 + La2O3)/B2O3 being 0.5 or higher. |
