Journal
BULLETIN OF MATERIALS SCIENCE
Volume 42, Issue 2, Pages -Publisher
INDIAN ACAD SCIENCES
DOI: 10.1007/s12034-019-1750-3
Keywords
Dielectric relaxor; Lorentz equation; modified Lorentz equation; electromechanical coupling; piezoelectric charge constant
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Dielectric data of new [Ba(NdxTi1-2xNbx)O3]0.30[Na0.5Bi0.5TiO3]0.70 (x=0.075) relaxor ceramic was modelled using a new modified Lorentz equation (T and simultaneously) as proposed by us. The activation energy for thermally activated orientation of dipoles and relaxation times were estimated. Dielectric resonance and anti-resonance data as a function of temperature and angular frequency of other piezoelectric compound [Ba(Nd0.1Ti0.8Nb0.1)O3]0.35[(Na0.5Bi0.5)TiO3]0.65 was also modelled using the modified Lorentz equation as proposed by us. It is shown that using this equation, it is possible to obtain the polarizability, piezoelectric charge constant, piezoelectric voltage constant and activation energy for resonance and anti-resonance.
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