Electrical and mechanical properties of Li2O–BaO–B2O3 glass system

Abstract Lithium barium borate glasses of composition x Li 2 O–5BaO–(95 − x )B 2 O 3 ( x = 5, 10, 15 and 20 mol%) were prepared by a conventional melt quenching method. Structure that was investigated using X-ray diffraction has indicated the amorphous state of the prepared glasses. Increase in density (2.281–2.495 g/cm 3 ) and the decrease in molar volume of the glass samples indicated the compactness of glass network upon addition of Li 2 O. Measurements of dielectric constant and DC and AC conductivity glass system were carried out at temperatures ranging from 470 to 680 K. Results showed that changes of Li 2 O concentration considerably affect the values of dielectric constant and DC and AC conductivities. DC conductivity of glass increases as Li 2 O concentration increases. At room temperature and at 4 MHz frequency, longitudinal (Lm), shear (G), bulk (B), Young's (Y) modulus and Poisson's ratio have been obtained as a function of Li 2 O content.