Pyroelectric properties in three phases coexistence Pb[(Mn0.33Nb0.67)0.5(Mn0.33Sb0.67)0.5]0.08(ZrxTi1-x)0.92O3 lead ceramics

The bulk dense Pb[(Mn0.33Nb0.67)0.5(Mn0.33Sb0.67)0.5]0.08(ZrxTi1−x)0.92O3 pyroelectric ceramics have been successfully prepared by the conventional solid method. The effect of three phases coexistence in the ceramics is studied. When x=0.95 and 0.85 in the ceramics, the maximum pyroelectric coefficient peaks appear at 23°C and 45°C, and the maximum values are 26.5×10−4C/m2°C and 25.5×10−4C/m2°C, respectively. The maximum pyroelectric coefficient appears large while the peaks widths are small. When the two kinds of ceramic powders mixed with the mol ratio of 2:1, the pyroelectric coefficient of the ceramics is above 10.0×10−4C/m2°C in a broad temperature range from 20°C to 55°C. The possible physical mechanism of the temperature broadened phenomenon is briefly discussed.