Effect of CuO addition on the high-field and high-pressure behavior of microwave-prepared lead vanadate glasses

Abstract

High-field and high-pressure behavior of microwave-prepared xCuO:(45−x) PbO: 55V 2 O 5 (x ‫ס‬ 0 to 20) glasses were investigated for the first time. It was found that the addition of CuO significantly alters the nonlinear I-V characteristics of these glasses; while the glasses with x ‫ס‬ 10 exhibit a current-controlled negative resistance behavior associated with a memory type transition, glasses with x ‫ס‬ 15 show a threshold-type behavior. Remarkable differences were also noticed in the high-pressure electrical resistivity behavior between the low-and high-CuO-containing glasses. Corroborative thermal, electrical, microscopic, and spectroscopic measurements were carried out to understand the structure-property relations. A structural model was proposed, which is based on the chemical nature of the constituents present in the glasses. The model accounts well for the various observed properties of these glasses. Journal of MATERIALS RESEARCHa Dulong-Petit heat capacity values for all the above glasses ‫ס‬ 118.5 J K −1 mol −1 .B. Vaidhyanathan et al.: Effect of CuO addition on the high-field and high-pressure behavior of microwave-prepared lead vanadate glasses

Investigations on Spectroscopic Properties of Manganese Ions in Sodium Lead Alumino Borate Glasses

“…Addition of PbO to these glasses makes the materials more magnetically and electrically inert and also decrease the viscosity, increase the electrical resistivity and the ability to absorb X-rays [10]. PbO in contrast with the conventional alkali metals, has ability to form stable glasses due to its dual role-one as modifier and the other as glass network former in both ionic [11] and covalent bonding [12,13] with PbO 4/2 pyramidal units connected in puckered layers [14]. The study of the glasses doped with transition metal ions and its physical properties is of considerable interest in the application point of view.…”

AN ADIABATIC HOPPING OF dc ELECTRICAL CONDUCTIVITY STUDIES ON NiO SUBSTITUTED LEAD VANADATE GLASSES

“…In these glasses also multi-phonon-assisted hopping model of small polarons in the nonadiabatic regime was found to be consistent with the temperature dependence of conductivity in the entire temperature range. High field and high pressure behavior of x (CuO): (45 − x) PbO: 55V 2 O 5 (x = 0 to 20 mol%) glasses were investigated by Vaidhyanathan et al 19 These glasses with x = 15 mol% were found to be showing a threshold type behavior.…”