Pyroelectric and piezoelectric properties of yttrium-doped 0.15[Pb(Ni1/3Nb2/3)O3]–0.85[Pb(Zr1/2Ti1/2)O3] ceramics

Abstract We have studied the dielectric, pyroelectric and piezoelectric properties of 0.15[Pb(Ni 1/3 Nb 2/3 )O 3 ]–0.85[Pb(Zr 1/2 Ti 1/2 )O 3 ] + Y 2 O 3 (0, 0.5, 1.0, 3.0, 5.0 mol%) ceramic systems. For the sample doped with 1.0 mol% of Y 3+ and higher, the diffraction peaks corresponding to (1 0 0) and (2 0 0) planes have been widened and are getting rather split. The dielectric constant increases with increasing Y 3+ , which is related to the formation of extra phase. A well saturated P – E hysteresis loop is obtained for 0.15PNN–0.85PZT ceramic doped with 1.0 mol% Y 3+ , and the values of 2 P r and 2 E c are reached 21 μC/cm 2 and 7.7 kV/cm, respectively. Good pyroelectric properties have been obtained for the 1.0 mol% Y 3+ -doped sample with large figures of merit of F V =0.018 m 2 /C and F D =1.47×10 −5 Pa −1/2 at room temperature.