Open AccessChemical composition, structure and properties of glass and glass-ceramic materials in the system of BaO (PbO)- B2O3 - Al2O3 -TiO2
Author(s) -
Juan Jacobo Ruíz Valdés,
Alexander Gorokhovsky,
J.I. Escalante-Garcı́a
Publication year - 2011
Publication title -
química hoy chemistry sciences
Language(s) - English
Resource type - Journals
ISSN - 2007-1183
DOI - 10.29105/qh1.2-75
Subject(s) - materials science , crucible (geodemography) , vitrification , crystallization , ceramic , phase (matter) , chemical composition , lead oxide , dielectric , mineralogy , composite material , chemical engineering , chemistry , medicine , computational chemistry , optoelectronics , organic chemistry , engineering , andrology
The vitrification and crystallization of glasses in the system BaO(PbO)-B2O3-Al2O3-TiO2, containing (mol %): BaO (24.6-28.1 ), PbO (2.8-3.2), B2O3 (7.6-24.0), Al2O3 (15.9-25.5), TiO2 (39.1-41.1) were investigated. The batch compositions of different oxide molar ratios were fused in an electric furnace in a platinum crucible at 1450 ºC for 2 h and cast into cylindrical-shaped samples. The obtained glasses were crystallized at 950 ºC for 2h. BaTiO3 was recognized as a dominant crystalline phase in the produced glass-ceramic materials. The influence of B2O3 and Al2O3 contents on the chemical resistance, mechanical strength and dielectric properties was investigated. It is shown that the glass compositions containing (mol %): B203 7-25 and Al2O3 16-20 displayed the optimal combinations of exploitation properties. The influence of liquid phase separation on the abovementioned properties was also analyzed.