The characteristics of a BaO-Al2O3-B 2O3-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(SiO 4)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.
|Number of pages||7|
|Journal||Applied Physics A: Materials Science and Processing|
|Publication status||Published - 2009 Feb|
ASJC Scopus subject areas
- Materials Science(all)