Phosphate glasses for radioactive, hazardous and mixed waste immobilization
Lead-free phosphate glass compositions are provided which can be used to immobilize low level and/or high level radioactive wastes in monolithic waste forms. The glass composition may also be used without waste contained therein. Lead-free phosphate glass compositions prepared at about 900 C include mixtures from about 1--6 mole % iron (III) oxide, from about 1--6 mole % aluminum oxide, from about 15--20 mole % sodium oxide or potassium oxide, and from about 30--60 mole % phosphate. The invention also provides phosphate, lead-free glass ceramic glass compositions which are prepared from about 400 C to about 450 C and which includes from about 3--6 mole % sodium oxide, from about 20--50 mole % tin oxide, from about 30--70 mole % phosphate, from about 3--6 mole % aluminum oxide, from about 3--8 mole % silicon oxide, from about 0.5--2 mole % iron (III) oxide and from about 3--6 mole % potassium oxide. Method of making lead-free phosphate glasses are also provided. 8 figs.
- Research Organization:
- Associated Universities Inc
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- Assignee:
- Brookhaven Science Associates, Upton, NY (United States)
- Patent Number(s):
- US 5,840,638/A/
- Application Number:
- PAN: 8-772,982; TRN: 99:003304
- OSTI ID:
- 321181
- Resource Relation:
- Other Information: PBD: 24 Nov 1998
- Country of Publication:
- United States
- Language:
- English
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Phosphate glasses for radioactive, hazardous and mixed waste immobilization
Phosphate glasses for radioactive, hazardous and mixed waste immobilization