skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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 mole % to about 6 mole % iron (III) oxide, from about 1 mole % to about 6 mole % aluminum oxide, from about 15 mole % to about 20 mole % sodium oxide or potassium oxide, and from about 30 mole % to about 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 mole % to about 6 mole % sodium oxide, from about 20 mole % to about 50 mole % tin oxide, from about 30 mole % to about 70 mole % phosphate, from about 3 mole % to about 6 mole % aluminum oxide, from about 3 mole % to about 8 mole % silicon oxide, from about 0.5 mole % to about 2 mole % iron (III) oxide and from about 3 mole % tomore » about 6 mole % potassium oxide. Method of making lead-free phosphate glasses are also provided. 8 figs.« less

Inventors:
; ;
Publication Date:
Research Org.:
Associated Universities Inc
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
335455
Patent Number(s):
US 5,880,045/A/
Application Number:
TRN: 99:004580
Assignee:
Brookhaven Science Associates, Upton, NY (United States) PTO; SCA: 360601; 052001; PA: EDB-99:046278; SN: 99002077355
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 9 Mar 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 05 NUCLEAR FUELS; PHOSPHATE GLASS; LOW-LEVEL RADIOACTIVE WASTES; HIGH-LEVEL RADIOACTIVE WASTES; VITRIFICATION; CHEMICAL COMPOSITION; FABRICATION

Citation Formats

Cao, H., Adams, J.W., and Kalb, P.D. Phosphate glasses for radioactive, hazardous and mixed waste immobilization. United States: N. p., 1999. 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_335455,
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 mole % to about 6 mole % iron (III) oxide, from about 1 mole % to about 6 mole % aluminum oxide, from about 15 mole % to about 20 mole % sodium oxide or potassium oxide, and from about 30 mole % to about 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 mole % to about 6 mole % sodium oxide, from about 20 mole % to about 50 mole % tin oxide, from about 30 mole % to about 70 mole % phosphate, from about 3 mole % to about 6 mole % aluminum oxide, from about 3 mole % to about 8 mole % silicon oxide, from about 0.5 mole % to about 2 mole % iron (III) oxide and from about 3 mole % to about 6 mole % potassium oxide. Method of making lead-free phosphate glasses are also provided. 8 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 09 00:00:00 EST 1999},
month = {Tue Mar 09 00:00:00 EST 1999}
}