Ferroelectric, piezoelectric, pyroelectric studies on BaTi0.95(Ni1/3Nb2/3)0.05O3ceramic

The main objective of this paper is to study dielectric, ferroelectric, pyroelectric and piezoelectric proprieties of BaTi 0.95 (Ni 1/3 Nb 2/3 ) 0.05 O 3 . From dielectric experiments, a single ferroelectric transition temperature of about 300K was found. The ferroelectric hysteresis loops were recorded versus temperature evidencing a saturation polarisation of about 4μC/cm 2 and a coercive field of 0.97kV/cm at the lowest temperature. The most promising result for BaTi 0.95 (Ni 1/3 Nb 2/3 ) 0.05 O 3 is its effective piezoelectric coefficient d 31 which reaches 55pCN −1 at room temperature.