TY - JFULL AU - M. S. Gaafar and S. Y. Marzouk PY - 2015/11/ TI - Structural Investigation of Na2O–B2O3–SiO2 Glasses Doped with NdF3 T2 - International Journal of Materials and Metallurgical Engineering SP - 1248 EP - 1257 VL - 9 SN - 1307-6892 UR - https://publications.waset.org/pdf/10003587 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 106, 2015 N2 - Sodium borosilicate glasses doped with different content of NdF3 mol % have been prepared by rapid quenching method. Ultrasonic velocities (both longitudinal and shear) measurements have been carried out at room temperature and at ultrasonic frequency of 4 MHz. Elastic moduli, Debye temperature, softening temperature and Poisson's ratio have been obtained as a function of NdF3 modifier content. Results showed that the elastic moduli, Debye temperature, softening temperature and Poisson's ratio have very slight change with the change of NdF3 mol % content. Based on FTIR spectroscopy and theoretical (Bond compression) model, quantitative analysis has been carried out in order to obtain more information about the structure of these glasses. The study indicated that the structure of these glasses is mainly composed of SiO4 units with four bridging oxygens (Q4), and with three bridging and one nonbridging oxygens (Q3). ER -