Title

High Thermal Expansion Phosphate Glasses. Part 2

Abstract

The chemical durability of phosphate glasses can be improved by adding oxides such as Al2O3 or PbO. The general compositions investigated were M2O-MO-M2O3-P2O5, where M2 = Ag2O, Na2O, or K2O, MO = BaO or PbO, and M2O3 = Al2O3 or Fe2O3. Ag2O and PbO resulted in important improvements in chemical durability while maintaining high thermal expansion. Many glass compositions in the system had a thermal expansion coefficient of 180 to 210 x 10-7/deg C and a dissolution rate in deionised water at 70°C of <10-7 g/cm2 min. Some of these compositions appeared to be good candidates for sealing glasses.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Glass Manufacture--Chemical Modification; Glass--Thermal Expansion; Alumina Additions; Chemical Durability; Phosphate Glasses

International Standard Serial Number (ISSN)

171050

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1991 Society of Glass Technology, All rights reserved.

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