Dielectric dispersion, linear and nonlinear optical properties of Li<sub>2</sub>O–WO<sub>3</sub>–B<sub>2</sub>O<sub>3</sub>: V<sub>2</sub>O<sub>5</sub> glasses
L. Srinivasa Rao, C. Thirmal, P. Raghavendra Rao
Abstract
40 Li 2 O–5 WO 3 –(55-[Formula: see text]) B 2 O 3 : [Formula: see text]V 2 O 5 (mol%) for [Formula: see text] glasses were prepared by melt-quenching. Electric polarization was described in terms of the dielectric constant ([Formula: see text]) and loss ([Formula: see text]). Mixed conduction phenomenon was explained by redox pairs [Formula: see text] and [Formula: see text] at high temperatures. Electronic polarizability ([Formula: see text]) was determined over a range of frequencies (100[Formula: see text]Hz–100[Formula: see text]kHz) and temperatures (30–[Formula: see text]C). The change of boron coordination in the glass network was explained with the aid of temperature coefficient of polarizability ([Formula: see text]). Nonlinear susceptibility ([Formula: see text]) and optical band gap ([Formula: see text]) were studied as a function of concentration of V 2 O 5 . The highest values of [Formula: see text] and [Formula: see text] were obtained at [Formula: see text][Formula: see text]mol%. These glasses may find potential practical applications in the fields of solid-state ionics and nonlinear optics.