High Thermal Expansion Phosphate Glasses. Part 2
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.
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.
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)
Article - Journal
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