Low melting high lithia glass compositions and methods
The invention relates to methods of vitrifying waste and for lowering the melting point of glass forming systems by including lithia formers in the glass forming composition in significant amounts, typically from about 0.16 wt % to about 11 wt %, based on the total glass forming oxides. The lithia is typically included as a replacement for alkali oxide glass formers that would normally be present in a particular glass forming system. Replacement can occur on a mole percent or weight percent basis, and typically results in a composition wherein lithia forms about 10 wt % to about 100 wt % of the alkali oxide glass formers present in the composition. The present invention also relates to the high lithia glass compositions formed by these methods. The invention is useful for stabilization of numerous types of waste materials, including aqueous waste uranium oxides The decrease in melting point achieved by the present invention desirably prevents volatilization of hazardous or radioactive species during vitrification.
- Research Organization:
- Westinghouse Savannah River Company
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC0989SR18035
- Assignee:
- Westinghouse Savannah River Company
- Patent Number(s):
- 6,624,103
- Application Number:
- 09/850,777
- OSTI ID:
- 1174500
- Country of Publication:
- United States
- Language:
- English
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Low melting high lithia glass compositions and methods
Low melting high lithia glass compositions and methods