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研究了改性的PbTiO_3陶瓷(Pb_(0.9)Sm_(0.1))TiO_3的详细的物理和铁电性能,然后根据这种材料在IR传感器上的用途对结果进行了讨论。发现Sm改性的PbTiO_3,具有低的介电常数,高的热电系数以及合适的热和机械特性。其居里温度与未改性的PbTiO_3陶瓷相比,从470℃降到156℃。将根据测得的性能计算的品质因数与其它的PbTiO_3组成和LiTaO_3单晶作了比较。结果表明,Sm改性的PbTiO_3陶瓷是用于横向模式和热电/CCD阵列的合适材料。这种材料相对于其极化的内偏压场约为1.2kV/cm,以此可制出长期工作的探测器。
The detailed physical and ferroelectric properties of the modified PbTiO_3 ceramic (Pb_ (0.9) Sm_ (0.1)) TiO_3 were investigated and the results were discussed based on the use of this material on IR sensors. Sm-modified PbTiO 3 was found to have low dielectric constant, high pyroelectric coefficient, and suitable thermal and mechanical properties. The Curie temperature dropped from 470 ℃ to 156 ℃ compared with unmodified PbTiO_3 ceramics. The quality factor calculated from the measured properties is compared to other PbTiO_3 compositions and LiTaO_3 single crystals. The results show that the Sm-modified PbTiO_3 ceramic is a suitable material for lateral mode and thermoelectric / CCD arrays. This material relative to its polarized internal bias field is about 1.2kV / cm, which can be made long-term detector.