Abstract
The characteristics of a BaO–Al2O3–B2O3–SiO2–La2O3 glass ceramic prepared by spray pyrolysis were studied. Glass powders with spherical shape and amorphous phase were prepared by complete melting at a preparation temperature of 1 500°C. The mean size and geometric standard deviation of the powders prepared at the temperature of 1 500°C were 0.6 μm and 1.3. The glass powders had similar composition to that of the spray solution. The glass transition temperature (T g) of the glass powders was 600.3°C. Two crystallization exothermic peaks were observed at 769.3 and 837.8°C. Densification of the specimen started at a sintering temperature of 600°C, in which Ba4La6O(SiO4)6 as main crystal structure was observed. Complete densification of the specimen occurred at a sintering temperature of 800°C. The specimens sintered at temperatures above 800°C had main crystal structure of BaAl2Si2O8.
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Jung, D.S., Kang, Y.C. Preparation and characteristics of a BaO–Al2O3–B2O3–SiO2–La2O3 glass ceramic via spray pyrolysis. Appl. Phys. A 94, 411–417 (2009). https://doi.org/10.1007/s00339-008-4823-5
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DOI: https://doi.org/10.1007/s00339-008-4823-5