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Title: Phosphate glasses for radioactive, hazardous and mixed waste immobilization

Abstract

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.

Inventors:
; ;
Issue Date:
Research Org.:
Associated Universities Inc
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
321181
Patent Number(s):
5,840,638
Application Number:
PAN: 8-772,982; TRN: 99:003304
Assignee:
Brookhaven Science Associates, Upton, NY (United States) PTO; SCA: 360601; 052002; PA: EDB-99:030599; SN: 99002058528
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 24 Nov 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 05 NUCLEAR FUELS; PHOSPHATE GLASS; WASTE FORMS; CHEMICAL COMPOSITION; LOW-LEVEL RADIOACTIVE WASTES; HIGH-LEVEL RADIOACTIVE WASTES; VITRIFICATION

Citation Formats

Cao, H., Adams, J.W., and Kalb, P.D. Phosphate glasses for radioactive, hazardous and mixed waste immobilization. United States: N. p., 1998. Web.
Cao, H., Adams, J.W., & Kalb, P.D. Phosphate glasses for radioactive, hazardous and mixed waste immobilization. United States.
Cao, H., Adams, J.W., and Kalb, P.D. Tue . "Phosphate glasses for radioactive, hazardous and mixed waste immobilization". United States.
@article{osti_321181,
title = {Phosphate glasses for radioactive, hazardous and mixed waste immobilization},
author = {Cao, H. and Adams, J.W. and Kalb, P.D.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {11}
}