International Science Community Association Research Journal of Chemical Sciences 15 2 2025 06 18 Characterization of some alkali borate glasses using ultrasonic and spectroscopic techniques 19 27 EN Gupta Swaroopa Rani N. 1 Department of Chemistry, Brijlal Biyani Science College, Amravati, Maharashtra, India T. Sumathi 1 Department of Physics, Annamalai University, Annamalainagar – 608 002, India S. Parkavi 2 Department of Physics, Annamalai University, Annamalainagar – 608 002, India C. Soundaraj 3 Department of Physics, Annamalai University, Annamalainagar – 608 002, India K. Jetruth Mary Alphonsa 4 Department of Physics, Annamalai University, Annamalainagar – 608 002, India > Research Paper 2024 12 5 2025 06 18 In this present work, different compositions of 70B2O3 – (30-x) PbO – x K2O/Li2O (x = 2,4,6,8,10) glasses were prepared by using melt quenching technique. The longitudinal and transverse ultrasonic velocities were measured at 10 MHz using the overlapped pulse echo approach at room temperature. Evaluations of various parameters such as molar volume, Poisson's ratio, acoustic impedance, microhardness, Debye temperature and thermal expansion coefficient have been calculated by using the measured values of density, velocity, and elastic constants. Changes in the glass network's structure with compositions are examined in relation to these parameter alterations. Using XRD and SEM, the amorphous nature and morphology of the glass samples are examined. The functional groups were identified in the glass samples by using the FTIR analysis. Copyright@ International Science Community Association