Dielectric, impedance and resistivity studies on [Ba(Nd0.1Ti0.8Nb0.1)O3]0.40[(Na0.5Bi0.5)TiO3]0.40[CaTiO3]0.20 piezoelectric ceramic

•The dielectric, Impedance and resistivity properties of new [Ba(Nd0.1Ti0.8Nb0.1)O3]0.40[(Na0.5Bi0.5)TiO3]0.40[CaTiO3]0.20 ceramic were studied.•New equations which was proposed by us presently and earlier is used to simulate the experimental data instead of well known Arrhenius, modified Arrhenius and Vogel-Fulcher laws which are indirect way to do so.•The proposed equations best fit to the experimental data and can be extended to study the other multiferroic materials.