Pyroelectric properties of the multi-component ferroelectric ceramic materials

Five-component ferroelectric ceramic materials, on the basis of solid solutions of PbTiO3-PbZrO3-PbNb2/3Zn1/3O3-PbSb2/3Mn1/3O3-PbW1/2Mg1/2O3(system I) and PbTiO3-PbZrO3-PbNb2/3Zn1/3O3-PbSb2/3Mn1/3O3-PbNb2/3Mn1/3O3 (system II), have been prepared by means of hot pressing technique. The pyroelectric properties of the above mentioned ceramic materials were investigated at room temperature for compositions front both tetragonal and rhombohedral phase areas, as well as from the morphotropic phase boundary region. The dependence of the pyroelectric coefficient on the concentration of PbTiO3 is shown. Enhanced pyroelectric activity of the systems under investigation was found. The pyroelectric coefficient for the compositions fi om the morphotropic region worked our at gamma(1)=4x10(-4)Cm(-2)K and gamma(2)=5x10(4)Cm(-2)K for the system I and II, respectively. It was stated that the materials under investigation were characterised by high merit numbers, which made them prospective for pyroelectric detectors. (C) 1999 Elsevier Science Limited All rights reserved.