| 摘要 |
The present invention relates to glass, glass-ceramic materials, lamp reflectors and processes for making them. The glass material has a composition, by weight of the total composition, comprising 56-67% SiO<SUB>2</SUB>; 9-22% Al<SUB>2</SUB>O<SUB>3</SUB>; 3.4-3.8% Li<SUB>2</SUB>O; 1.8-2.6% ZnO; 1.5-2.5% MgO; 3.3-5% TiO<SUB>2</SUB>; 0-2.5% ZrO<SUB>2</SUB>; 1.5-3% B<SUB>2</SUB>O<SUB>3</SUB>; 0-6% P<SUB>2</SUB>O<SUB>5</SUB>; 0-0.6% F; less than 500 ppm Fe; and components resulting from effective amount of at least one refining agent. The glass-ceramic material of the present invention contains beta-spodumene solid solution as the predominant crystalline phase, and can be obtained by proper thermal treatment of the glass-ceramic material.
|
