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Glass Formation in the System SiO 2 –PbO Containing Transition‐Metal Oxides
Author(s) -
Nitta Atsumi,
Miura Terumi,
Komatsu Takayuki,
Matusita Kazumasa
Publication year - 1989
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.1151-2916.1989.tb05975.x
Subject(s) - manganese , materials science , glass transition , transition metal , valence (chemistry) , chemical composition , non blocking i/o , metal , mineralogy , analytical chemistry (journal) , inorganic chemistry , metallurgy , chemistry , polymer , biochemistry , organic chemistry , chromatography , composite material , catalysis
Glass‐forming regions, valence states, and viscosities in SiO 2 –PbO systems containing various transition‐metal oxides as a third component were investigated. The glasses were prepared by melting in an open atmosphere. The glass‐forming regions ranged as follows: MnO≡ZnO > FeO 1.5 >NiO. The ratios Fe 2+ /(Fe 2+ + Fe 3+ ) and Mn 3+ / (Mn 3+ + Mn 2+ ) in the glasses were determined by chemical analysis. The Fe 2+ / (Fe 2+ + Fe 3+ ) ratio in SiO 2 –PbO–FeO 1.5 glasses ranged from 0.016 to 0.050. The Mn 3+ / (Mn 3+ + Mn 2+ ) ratio in SiO 2 –PbO–MnO glasses ranged from 0.056 to 0.30. The fraction of manganese (III) ions in the glasses varies considerably with the glass composition. The effects of transitionmetal oxides on the viscosity are discussed.