Pyroelectricity of BaTiO₃-doped PMNT ferroelectric system for pyroelectric sensor

In this study, an MPB PMNT system containing 0.05 to 0.10 wt.% BaTiO3 was synthesized using a traditional chemical method and its pyroelectricity was investigated. Pyroelectricity, dielectricity, and ferroelectricity of the synthesized BaTiO3-PMNT system were analyzed by heat treatment at 1240~1280 oC for 4 hours to evaluate its applicability as a pyroelectric sensor. Unlike the simple ABO3 ferroelectric, the BaTiO3-doped PMNT system exhibited phase transition characteristics over a wide temperature range typical of complex perovskite structures. Although no dramatic change could be confirmed depending on the amount of BaTiO3 added, stable pyroelectricity was maintained near room temperature and over a wide temperature range. When the amount of BaTiO3 added increased from 0.05BaTiO3-PMNT to 0.10BaTiO3-PMNT, the electric field slightly increased from 5.00x103 kV/m to 6.75x103 kV/m, and the maximum value of remanent polarization slightly increased from KCI Citation Count: 0