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Lead Galliate Glasses
Author(s) -
Shelby James E.
Publication year - 1988
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1988.tb05072.x
Subject(s) - thermal expansion , materials science , mineralogy , cutoff , analytical chemistry (journal) , chemistry , composite material , environmental chemistry , physics , quantum mechanics
Glasses have been formed in the binary system PbO–Ga 2 O 3 within the compositional range extending from 60 to 80 mol% PbO. These glasses exhibit infrared cutoff values near 7.75 μm. The glasses are orange‐red as a result of a cutoff in visible transmission near 500 nm. The glass transformation temperature decreases with increasing PbO concentration, whereas the thermal‐expansion coefficient and density increase with increasing PbO content. Glasses containing 70 to 75 mol% PbO are good glass formers, with little tendency to crystallize, and exhibit good weathering behavior on exposure to normal atmosphere.