The improvement of the pyroelectric properties of Pb(Zr, Ti)O3 (PZT) ceramics by means of compositional and morphological modification was realized. A compact body consisting mainly of equimolar PbZrO3 (PZ) and PZT raw powders was encapsulated within a petri dish, followed by Ar-HIP under the conditions of 900°C-98MPa-2h. The dense body obtained was probably composed of the two raw powders and their serial solid solutions, of which the temperature dependence of the pyroelectric coefficient of 9.4×10-4C·m-2·°C-1 at 25°C was almost flat over a wide temperature range of 15-70°C. Furthermore, the figure of merit (FM1) of this dense body was 199×10-14C·m·J-1 which was sufficient for practical applications.
