AC conductivity and dielectric properties of (Bi,Na)TiO3–BaTiO3 lead free ceramics
作者： Woo-Seok Kang , Sang-Kwon Lee , Jung-Hyuk Koh
DOI: 10.1016/J.CERAMINT.2015.01.147
关键词: Dissipation factor 、 Dielectric 、 Piezoelectricity 、 Materials science 、 Coercivity 、 Curie temperature 、 Ceramic 、 Analytical chemistry 、 X-ray crystallography 、 Ferroelectricity
摘要: Abstract (Bi,Na)TiO 3 (BNT) based ceramics have been extensively investigated for electronic device applications. BNT is ferroelectric material with ABO perovskite structure. high Curie temperature ( T c =320 °C) and remanent polarization P r =38 µC/cm 2 ). Despite its relatively coercive field E =7.3 kV/mm) low piezoelectric constant d 33 =83 pC/N). Temperature frequency dependent relative dielectric permittivity loss tangent can play an important role in the performance. To analyze characteristics across wide (303–403 K) range (1 kHz to 3 MHz), AC conductivities of (1− x )(Bi 0.5 Na TiO )− (BaTiO ) =0, 0.02, 0.04, 0.06, 0.08, or 0.10 were measured analyzed. The conduction mechanism was evaluated through simulations calculations on Arrhenius-type equation.
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