Exploration of the Glass Domain in the SiO2-B2O3-TiO2-La2O3 System

The conventional melting and annealing procedure were used to manufacture glass matrices with a nominal composition of x La 2 O 3 -( 20 - x )TiO 2 -23SiO 2 -57B 2 O 3 and a gradual partial replacement of TiO 2 by La 2 O 3 . The present study uses X-ray diffraction (XRD), pulse-echo technique, and differential thermal analysis (DTA) to examine the effects of La 2 O 3 content on the TiO 2 -B 2 O 3 -SiO 2 glass. The amorphous structure of the samples was confirmed by (XRD) investigations. The DTA curve showed that the glass transition temperature increased between 501 and 566 °C with an increase in La 2 O 3 content. The elastic properties of the glass were established by utilizing variations in density and ultrasonic velocities. The pulse-echo technique examinations revealed an increase in the ultrasonic velocities, the Debye temperature, the micro-hardness, the connectivity of fractal bonds, the Poisson's ratio, and the mechanical parameters. For prepared glasses, Makishima-theory Mackenzie's has also been shown to be applicable. Additionally, the majority of the experimentally determined elastic moduli and Poisson's ratio values are in good agreement with values estimated using Makishima and Mackenzie's model.