| 摘要 |
FIELD: glass production. SUBSTANCE: lead-free glass has density not more than 2.9 g/cu.cm, refractive index, not more 1.545 and contains, mass %: SiO, 51-63; LiO, 0-3; NaO, 0-8; KO, 0-12; LiO+NaO+KO, 7-15; SrO, 0-<8; BaO, >13-21; ZnO, 5-15; SrO+BaO+ZnO, 27-3; AlO, 0-5; ZrO, 0-6; SiO+AlO+ZrO, 55-66; TiO, 0-3; CaO, 0-5; MgO, 0-3; BO, 0-3; LaO, 0-8. EFFECT: higher functional properties. |
