Pb(Sc_<1/2>Ta_<1/2>)O_3-Pb(Sc_<1/2>Nb_<1/2>)O_3系固溶体セラミックスの作製とその特性

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{(1-x)Pb(Sc_<1/2>Ta_<1/2>)O_3-xPb(Sc_<1/2>Nb_<1/2>)O_3+0.5 mass% MnO_2}(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 × 10^3 to 8.55 × 10^3 kg/m^3. The temperature dependence of the relative dielectric constant, ε_r for PST-PSN ceramics apparently exhibited the diffuse phase transition in all the compositions. Assuming that the volume specific heat, C_V of the present samples with x=0.4-0.9 are 2.5 × 10^6 J/m^3・K, x=0.4 PST-PSN sample exhibited the highest figures of merit, F.M.for voltage responsivity, R_V of around 8.5 × 10^<-14> C・m/J and F.M.D^* for specific detectivity, D^* of around 5.9 × 10^<-11> C・m/J, among the six samples studied here.
社団法人日本セラミックス協会の論文
1998-02-01