Temperature Dependence of Dielectric and Piezoelectric Properties of Pb(In_1/2Nb_1/2)O_3-PbTiO3 Single Crystal

Temperature dependence of dielectric, piezoelectric properties and polarization vs E-field curves of Pb(In1//2Nbi/2)O3-PbTiO3 single crystal grown directly from melt by the modified Bridgman technique with an allomeric Pb(Mg1/3Nb2/3)03-PbTiO3 seed crystal was investigated. For 001 poled crystals, the permittivity er and the dielectric loss tangent tgδ are 5000 and 1% respectively. For T 100℃, the value of k33 is relatively temperature independent, with a value between 0.9 to 0.95, even at 150℃, the value of k33 decreases by only 10%. The value of d33 reaches up to a maximum of 3000 pC/N at about 80℃, and has a value of 850 pC/N at 150℃. The results obtained show that (1-x)Pb(In1/2Nb1/2)O3-xPbTiO3 single crystals are promising for a wide range of electromechanical transducer applications.