Abstract
{(1-x)Pb(Sc1/2Ta1/2)O3-xPb(Sc1/2Nb1/2)O3+0.5 mass% MnO2} (PST-PSN) solid-solution ceramics, where x=0.1-0.9, were prepared by normal sintering in a PbO atmosphere. The physical, dielectric and pyroelectric properties were evaluated using PST-PSN ceramics with x=0.1-0.9, respectively. All the obtained samples were high density sintered bodies with the low apparent porosities of less than 0.2%, ranging in bulk densities from 7.67×103 to 8.55×103kg/m3. The temperature dependence of the relative dielectric constant, εr for PST-PSN ceramics apparently exhibited the diffuse phase transition in all the compositions. Assuming that the volume specific heat, Cv of the present samples with x=0.4-0.9 are 2.5×106J/m3⋅K, x=0.4 PST-PSN sample exhibited the highest figures of merit, F. M. for voltage responsivity, Rv of around 8.5×10-14C⋅m/J and F. M. D* for specific detectivity, D* of around 5.9×10-11C⋅m/J, among the six samples studied here.
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