Showing papers by "Neetu Ahlawat published in 2009"
TL;DR: In this article, the role of Bi 2 O 3 in normal melt quenching technique was investigated in order to understand the role and role of B O 6 octahedra in these glasses.
60 citations
TL;DR: In this article, Li2O3/Li2O ratio in Bismuth-silicate glass was found to be dependent directly on Bi2O 3/Li 2O ratio, and the optical transmission spectra in the wavelength range from 200 to 3300 nm were recorded and optical band gap was calculated.
37 citations
TL;DR: In this paper, the influence of Na2SO4 on physical and thermal properties has been interpreted using density, molar volume and DSC data using melt-quenching technique.
18 citations
TL;DR: In this article, the authors studied the electrical relaxation and conductivity of glass with Li 2 O and SiO 2 compositions in the frequency range from 20 Hz to 1 MHz and in the temperature range from 453 to 603 K.
11 citations
TL;DR: In this article, Li2O·P2O5 glass has been studied in bismuth lithium phosphate glasses in the frequency range 20Hz-1MHz and in the temperature range 423-573 K using impedance spectroscopy.
Abstract: Lithium ion transport has been studied in bismuth lithium phosphate glasses in the frequency range 20 Hz–1 MHz and in the temperature range 423–573 K using impedance spectroscopy. The addition of Bi2O3 in Li2O·P2O5 glass is related to the modification of the glass structure and facilitates the Li+ ions migration. The ac and dc conductivities, activation energy of the dc conductivity and relaxation frequency are extracted from the impedance spectra. Conductivity of the present glass system is found to be ionic in nature. The electrical response of the glasses has been studied using both conductivity and electric modulus formalisms. A single ‘master curve’ for normalized plots of all the modulus isotherms observed for a given composition indicates the temperature independence of the dynamic processes for ions in these glasses. Nearly identical values of activation energy for dc conduction and for conductivity relaxation time indicate that the ions overcome same energy barrier while conducting and relaxing.
9 citations