High Thermal Expansion Phosphate Glasses. Part 2

Author

Yongren B. Peng
D. E. Day, Missouri University of Science and TechnologyFollow

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.

Recommended Citation

Y. B. Peng and D. E. Day, "High Thermal Expansion Phosphate Glasses. Part 2," Glass Technology, vol. 32, no. 6, pp. 200 - 205, Society of Glass Technology, Dec 1991.

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)

0017-1050

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1991 Society of Glass Technology, All rights reserved.

Publication Date

01 Dec 1991