Open AccessCrystallization and Characterization of Y2O3-SiO2 Glasses
Author(s) -
Charles H. Drummond,
William Lee,
William A. Sanders,
James D. Kiser
Publication year - 2008
Publication title -
ceramic engineering and science proceedings
Language(s) - English
Resource type - Book series
SCImago Journal Rank - 0.128
H-Index - 33
eISSN - 1940-6339
pISSN - 0196-6219
DOI - 10.1002/9780470310502.ch28
Subject(s) - crystallization , differential thermal analysis , cristobalite , materials science , characterization (materials science) , thermal analysis , analytical chemistry (journal) , gravimetric analysis , mineralogy , thermogravimetric analysis , phase (matter) , fourier transform infrared spectroscopy , quenching (fluorescence) , chemical engineering , diffraction , thermal , metallurgy , chemistry , thermodynamics , chromatography , nanotechnology , fluorescence , optics , engineering , physics , quartz , organic chemistry
Glasses in the yttria-silica system with 20 to 40 mol pct Y2O3 were subjected to recrystallization studies after melting at 1900 to 2100 C in W crucibles in 1 and 50 atm N2. The TEM and XRD results obtained indicate the presence of the delta, gamma, gamma prime, and beta-Y2Si2O7 crystalline phases, depending on melting and quenching conditions. Heat treatment in air at 1100 to 1600 C increased the amount of crystallization, and led to the formation of Y2SiO5, cristabalite, and polymorphs of Y2Si2O7. Also investigated were the effects of 5 and 10 wt pct zirconia additions.
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