Selenium encapsulation for producing colored glass.

摘要

The present invention provides a glass forming composition for encapsulating selenium which includes, by weight percent of raw materials, 20 to 50% silica and 50 to 80% alkali and alkaline earth materials. The composition has a liquidus temperature between 600 to 1200 DEG C, preferably up to 1000 DEG C, and a viscosity up to 10,000 Poise at said liquidus temperature, preferably up to 5,000 Poise. The alkali and alkaline materials preferably include at least one group of materials combined in an approximate eutectic molar ratio. In one particular embodiment of the invention, the alkali and alkaline earth materials include groups of nitrates, such as KNO3, NaNO3 and/or Ca(NO3)2, and/or carbonates, such as K2CO3, Na(CO3)2 and/or Li2CO3.