Thermal and Mechanical Studies of Cerium Molybdenum Borosilicate Glasses and Glass-Ceramics

This investigation will focus on a particular molybdenum borosilicate glass with the form 61B(2)O(3) - 19SiO(2)- (20-x) MoO3-x CeO2, x = (0 < x < 12 mol. %). DTA examination was conducted using a Shimadzu-DTA equipment. The powder glass samples (10 mg) were placed in a platinum pan and heated to 800 degrees C in nitrogen medium at various rates. The temperatures of the glass transition, T-g, the crystallization extrapolated onset, T-c, the crystallization peak, T-P, and melting T-m, were determined. The quantity of CeO2 in the checked glass had a significant impact on its crystallization behavior, with an increase in CeO2 content increasing ?T and thus making the glasses more stable. With increasing CeO2 concentrations, both E-G & E-c values decrease, as expected given the rise in T-g & T-P values. XRD and SEM were used to identify the crystallizing phases and microstructural morphology for each composition. Based on XRD observations, Molybdenum Silicide (Mo3Si2), Molybdenum Boride (B2Mo1), Cerium Borate (B1Ce1O3), Cerium Molybdenum Oxide (Ce16Mo21O56) and Cerium Silicide Oxide (Ce10O3Si8) phases were detected. The presence of particles with different shapes in both compositions was revealed by SEM micrographs. As CeO(2 )concentrations increased, the ultrasonic velocities & elastic moduli increased.