Open AccessRole of molybdenum ions in lead zinc phosphate glass system by means of dielectric studies
Author(s) -
P. Venkateswara Rao,
G. Naga Raju,
P. Syam Prasad,
T. Satyanarayana,
L. Srinivasa Rao,
F. Goumeidane,
M. Iezid,
W. Marltan,
G. Sahaya Baskaran,
N. Veeraiah
Publication year - 2018
Publication title -
materials science poland
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 32
eISSN - 2083-1331
pISSN - 2083-134X
DOI - 10.2478/msp-2018-0074
Subject(s) - dielectric , materials science , conductivity , activation energy , dopant , analytical chemistry (journal) , dielectric loss , relaxation (psychology) , doping , molybdenum , thermal conduction , ion , chemistry , composite material , optoelectronics , metallurgy , organic chemistry , chromatography , psychology , social psychology
PbO-ZnF 2 -P 2 O 5 glasses doped with different mol% (0.1 to 1.0) of MoO 3 have been prepared. Dielectric properties ∊ ′ (ω), tanδ, σ AC , of the synthesized samples were calculated from frequency measurements versus temperature. Space charge polarization was used to analyze the temperature and frequency dispersions of dielectric constant ∊ ′ (ω) and dielectric loss tanδ. Quantum mechanical tunneling model was employed to explain the origin of AC conductivity. The AC conductivity exhibited an increasing trend with increasing concentration of MoO 3 (up to 0.2 mol%) but the activation energy for conduction decreased. The plots of AC conductivity revealed that the relaxation dynamics depends on MoO 3 dopant concentration.