Open AccessDielectric And Relaxation Studies in Multi Oxides Doped Borotellurite Glasses
Author(s) -
Amarkumar Malge,
T. Sankarappa,
G.B. Devidas,
J. S. Ashwajeet,
Ashwini Devidas,
Mohansingh Heerasingh
Publication year - 2022
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1221/1/012015
Subject(s) - dielectric , activation energy , materials science , relaxation (psychology) , amorphous solid , doping , atmospheric temperature range , ionic conductivity , analytical chemistry (journal) , dielectric spectroscopy , conductivity , dielectric loss , ionic bonding , charge carrier , quenching (fluorescence) , electrical resistivity and conductivity , condensed matter physics , thermodynamics , chemistry , ion , optics , electrode , optoelectronics , electrochemistry , electrical engineering , crystallography , organic chemistry , engineering , psychology , social psychology , fluorescence , physics , electrolyte
Melt quenching technique has been adopted to synthesize a set of borotellurite glasses consisting of ZnO, Li 2 O, WO 3 and Dy 2 O 3 , with a varied content of WO 3 . After confirming their amorphous nature by XRD, they were investigated for dielectric properties over a wide range of freqency and temperature. Observed variations in dielectric parameters with frequency, temperarure and composition suggests the presence of mobility of charge carriers, increase of loss due to ionic migration and involvement of dc conductivity. Single phase and conducting nature of the samples have been obtained by sketching cole-cole plots. DC conductivity estimated from impedance spectra indicated semiconducting nature and its activation energy increased with increase of WO 3 concentration. Dielectric relaxation time and its thermal activation energy were determined independently from modulus and impedance and found that the former decreased with increase of temperature and the later increased with WO 3 content. Master curves drawn for electric moduli revealed that relaxation mechanism in these glasses is temperature independent.