Pyroelectric Properties of Lead Antimony Stannate-Lead Titanate-Lead Zirconate Ceramics Modified with La amd Mn

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In the present study, 0.10Pb(Sb_<1/2>Sn_<1/2>)O_3-0.25PbTiO_3-0.65PbZrO_3 ceramics modified with La_2O_3 (1 mol%) and MnO_2 (0∼0.30 mol%) were fabricated, and the structural and pyroelectric properties with different amounts of MnO_2 were studied. The crystal structure of specimens was rhombohedral, and average grain sizes decreased with increasing amounts of MnO_2. The (Pb_<0.99>La_<0.01>)[(Sb_<1/2>Sn_<1/2>)_<0.10>Ti_<0.25>Zr_<0.65>]O_3 specimen modified with 0.24 mol% MnO_2 showed a large pyroelectric coefficient, p, (=6.73 × 10^<-8> C/cm^2K) and voltage responsivity, R_v, (=125 V/W). Also, in the same specimens, noise equivalent power, NEP, and detectivity, D^*, were 2.376 × 10^<-7> W/HZ^<1/2> and 6.793 × 10^6 cm Hz^<1/2>W, respectively. In the (Pb_<0.99>La_<0.01>)[(Sb_<1/2>Sn_<1/2>)_<0.10>Ti_<0.25>Zr_<0.65>]O_3 specimens modified with 0.24 mol% MnO_2 voltage responsivity decreased with increasing chopper frequency, and was independent of the thickness of the specimens.
社団法人応用物理学会の論文
1993-05-15