Selenium encapsulation for producing colored glass

C - Chemistry – Metallurgy – 03 – C

Patent

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Details

C03C 4/02 (2006.01) C03C 1/02 (2006.01) C03C 1/10 (2006.01) C03C 3/062 (2006.01)

Patent

CA 2118737

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°C, preferably up to 1000°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.

La présente invention porte sur une composition formant du verre - pour encapsuler du sélénium -, renfermant, en % en poids, 20 à 50 de silice et 50 à 80 de matières alcalines et alcalino-terreuses. La composition a une température liquidus se situant entre 600 et 1200 degrés C, préférablement ne dépassant pas 1000 degrés C, et une viscosité ne dépassant pas 10000 poises à ladite température liquidus, et préférablement ne dépassant pas 5000 poises. Les matières alcalines et alcalino-terreuses sont composées d'au moins un groupe de matières combinées en proportions molaires à peu près eutectiques. Dans une des versions de l'invention, les matières alcalines et alcalino-terreuses comprennent des groupes de nitrates, comme KNO3, NaNO3 et (ou) Ca(NO3)2, et (ou) des carbonates, comme K2CO3, Na(CO3)2 et (ou) Li2CO3.

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