Effect of calcium doping on dielectric and pyroelectric properties of PLZT

Effect of calcium doping on structural, dielectric and pyroelectric properties of Pb
_0.92-x
La
_0.08
Cax(Zr
_0.65
Ti
_0.35
)
_0.98
O
₃
(PLCZT) composition derived by the solid state reaction method was studied. Rhombohedral perovskite phase was confirmed in all the PLCZT samples. Calcium doping did not show any structural change in PLCZT (8/65/35) up to 2.5 % doping, however grain size and crystallite size was found to increase up to 1%, but no systematic variation of transition temperature was found with Ca doping. P-E hysteresis loop parameters (E
_c
and P
_r
) and pyroelectric properties were found to decrease with Ca doping up to 1% and there after increased.