| 摘要 |
There is disclosed a borosilicate, opal glass article composed of a phase-separated, opacified interior portion completely encased within, and integral with, a transparent, single-phase glass, surface skin. The phase-separated portion contains borate-rich and silicate-rich phases so different in refractive index that light is scattered, and the glass may contain a titania-coupled colorant. The article may be produced by molding a glass charge while simultaneously extracting heat from a surface layer on the molded article to maintain such surface layer as a single-phase glass.
|
