Transactions of the INDIAN CERAMIC SOCIETY Vol. 70 2011
Study on the Formation of Crystalline Phases in Lanthanum Borosilicate Glass
Vishal Kumar, K. Singh* and O. P. Pandey
Abstract
Glass of composition 40SiO2-20B2O3-30SrO-10La2O3 was prepared by splat quenching techniques. Based on differential thermal analysis (DTA) studies the glass was heated at 900o and 950șC for different time durations. This heat treatment temperature which is nearly operating temperature of solid oxide fuel cell (SOFC) was knowingly selected to determine the nature of crystalline phases present in glass matrix. The as prepared and heat treated glass was characterized by X-ray diffraction technique for its confirmation of glassy structure and crystalline phases, respectively. The microstructural analyses of these heat treated glasses were done using scanning electron microscope (SEM) to study the morphology of crystalline phases. The thermal expansion coefficients (TEC) of glass and glass-ceramics were observed within required limit for SOFC application.
