| 摘要 |
<p>PROBLEM TO BE SOLVED: To create a high refractive index glass that has a high liquid phase viscosity without containing a large amount of expensive heavy metal.SOLUTION: A high refractive index glass according to the present invention comprises a glass composition comprising, by mass%, SiO: 26-70%, BO: 4.5-35%, MgO+CaO+SrO+BaO+ZnO: 10-48%, BaO: 10-31%, LiO+NaO+KO: 0-0.29%, and has a refractive index nof 1.51-2.0.</p> |
