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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.degree. 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.degree. C. to about 450.degree. 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.

Inventors:
 [1];  [2];  [3]
+ Show Inventor Affiliations
  1. Middle Island, NY
  2. Stony Brook, NY
  3. Wading River, NY
Issue Date:
Research Org.:
Associated Universities, Inc., Upton, NY (United States)
OSTI Identifier:
871995
Patent Number(s):
5840638
Application Number:
08/772,982
Assignee:
Brookhaven Science Associates (Upton, NY)
Patent Classifications (CPCs):
C - CHEMISTRY C03 - GLASS C03C - CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
phosphate; glasses; radioactive; hazardous; mixed; waste; immobilization; lead-free; glass; compositions; provided; immobilize; level; wastes; monolithic; forms; composition; contained; therein; prepared; 900; degree; mixtures; mole; iron; iii; oxide; aluminum; 15; 20; sodium; potassium; 30; 60; provides; ceramic; 400; 450; 50; 70; silicon; method; lead-free phosphate; monolithic waste; glass compositions; waste form; glass ceramic; mixed waste; aluminum oxide; radioactive waste; contained therein; silicon oxide; glass composition; radioactive wastes; phosphate glass; sodium oxide; phosphate glasses; level radioactive; waste forms; compositions prepared; waste immobilization; /501/588/

Citation Formats

Cao, Hui, Adams, Jay W, and Kalb, Paul D. Phosphate glasses for radioactive, hazardous and mixed waste immobilization. United States: N. p., 1998. Web.
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Cao, Hui, Adams, Jay W, & Kalb, Paul D. Phosphate glasses for radioactive, hazardous and mixed waste immobilization. United States.
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Cao, Hui, Adams, Jay W, and Kalb, Paul D. Tue . "Phosphate glasses for radioactive, hazardous and mixed waste immobilization". United States. https://www.osti.gov/servlets/purl/871995.
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@article{osti_871995,
title = {Phosphate glasses for radioactive, hazardous and mixed waste immobilization},
author = {Cao, Hui and Adams, Jay W and Kalb, Paul 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.degree. 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.degree. C. to about 450.degree. 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {11}
}
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Works referenced in this record:

Physical and chemical characteristics of lead-iron phosphate nuclear waste glasses
journal, January 1986

Development of Sphene-Based Glass Ceramics Tailored for Canadian Waste Disposal Conditions
journal, January 1981

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