Structural, dielectric, piezoelectric and ferroelectric behavior of rare earth double doped lead titanate ceramics synthesized by solid state method

Abstract

Praseodymium and yttrium in equal compositions was doped in lead titanate having general formula Pb1-xPrxTi1-yYyO3 where x (praseodymium) = y (yttrium) = 0.02, 0.04, 0.06 and 0.08. These four compositions were synthesized by solid state reaction technique. X-ray diffraction analysis confirms single phase formation with perovskite structure having tetragonal phase. Microstructural analysis shows formation of dense microstructure with grain size in the range of 0.38 - 0.54µm. Dielectric behavior as a function of temperature gave the value of Curie temperature. The diffusivity in the dielectric behavior was observed in three different compositions. Piezoelectric coefficient d33 showed an increasing trend with increase in compositions of the substituent. The ferroelectric properties were studied at room temperature as a function of composition. The value of remnant polarization (Pr), spontaneous polarization (Ps) and coercive field was determined.