Impedance spectroscopy of bismuth sodium titanate: Barium titanate ceramics with manganese doping

In this work we use Impedance Spectroscopy (IS) to study lead-free ceramics of perovskite structure (Bi1/2Na1/2TiO3)0.925(BaTiO3)0.075 with Mn doping of 0, 0.2, 1.0, and 2.0 atomic%. We compare our IS results with permittivity results, using dielectric to resistivity transformation equations which allow us to display results either as permittivity or as resistivity. We observe ionic conductivity dominating at lower temperatures, giving way to electronic conductivity at higher temperatures. The permittivity shows deviations from Curie-Weiss behavior characteristic of relaxor ferroelectrics. The 0.2% Mn samples show the highest ionic resistivity, which will reduce heating for high voltage piezoelectric applications. They also have the highest Curie-Weiss temperature and Burns temperature.

[1]  A. A. Bokov,et al.  Recent progress in relaxor ferroelectrics with perovskite structure , 2020, Progress in Advanced Dielectrics.

[2]  Cheng-Sao Chen,et al.  Dielectric, ferroelectric, and depolarization properties of B-site manganese-doped 0.925(Bi0.5Na0.5)TiO3–0.075BaTiO3 solid solutions , 2016 .

[3]  Cheng-Sao Chen,et al.  Raman spectra and structural stability in B-site manganese doped (Bi0.5Na0.5)0.925Ba0.075TiO3 relaxor ferroelectric ceramics , 2015 .

[4]  Cheng-Sao Chen,et al.  Structural phase stability and electric field induced relaxor–ferroelectric phase transition in (1 − x)(Bi0.5Na0.5)TiO3–xBaTiO3 ceramics , 2015 .

[5]  Cheng-Sao Chen,et al.  Large E-field induced strain and polar evolution in lead-free Zr-doped 92.5%(Bi0.5Na0.5)TiO3–7.5%BaTiO3 ceramics , 2014 .

[6]  V. Schmidt,et al.  Structural stability and depolarization of manganese-doped (Bi0.5Na0.5)1−xBaxTiO3 relaxor ferroelectrics , 2014 .

[7]  Cheng-Sao Chen,et al.  Enhanced Piezoelectric and Dielectric Responses in 92.5%(Bi0.5Na0.5) TiO3 ‐7.5%BaTiO3 Ceramics , 2014 .

[8]  Cheng-Sao Chen,et al.  Relaxor effect on electric field induced large strain in (1−x)(Bi0.5Na0.5)TiO3–xBaTiO3 lead-free piezoceramics , 2014 .

[9]  Cheng-Sao Chen,et al.  Polar nanoregions and dielectric properties in high-strain lead-free 0.93(Bi1/2Na1/2)TiO3-0.07BaTiO3 piezoelectric single crystals , 2014 .

[10]  Hou Jinli,et al.  MICROSTRUCTURE AND ELECTRICAL PROPERTIES , 2013 .

[11]  W. Jo,et al.  Temperature‐Dependent Properties of (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3–SrTiO3 Lead‐Free Piezoceramics , 2012 .

[12]  Wangzhou Shi,et al.  Large Strain Response in the Ternary Bi0.5Na0.5TiO3–BaTiO3–SrTiO3 Solid Solutions , 2012 .

[13]  V. Shvartsman,et al.  Lead-Free Relaxor Ferroelectrics , 2012 .

[14]  V. Schmidt,et al.  Origins of dielectric response and conductivity in (Bi1−xNdx)FeO3 multiferroic ceramics , 2011 .

[15]  Jacob L. Jones,et al.  Evolving morphotropic phase boundary in lead-free (Bi1/2Na1/2)TiO3–BaTiO3 piezoceramics , 2011 .

[16]  W. Jo,et al.  Perspective on the Development of Lead‐free Piezoceramics , 2009 .

[17]  Hajime Nagata,et al.  Phase diagrams and electrical properties of (Bi1/2Na1/2)TiO3-based solid solutions , 2008 .

[18]  E. Aulbach,et al.  Temperature‐Dependent Electrical Properties of 0.94Bi0.5Na0.5TiO3–0.06BaTiO3 Ceramics , 2008 .

[19]  Hajime Nagata,et al.  Large electrostrain near the phase transition temperature of (Bi0.5Na0.5)TiO3-SrTiO3 ferroelectric ceramics , 2008 .

[20]  Helmut Ehrenberg,et al.  Giant strain in lead-free piezoceramics Bi0.5Na0.5TiO3–BaTiO3–K0.5Na0.5NbO3 system , 2007 .

[21]  Hao Wang,et al.  Microstructure and electrical properties of MnO-Doped (Na0.5Bi0.5)0.92Ba0.08TiO3 lead-free piezoceramics , 2007 .

[22]  H. Nagata,et al.  Electrical Properties and Depolarization Temperature of (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3 Lead-free Piezoelectric Ceramics , 2006 .

[23]  Hajime Nagata,et al.  Lead-Free Piezoelectric Ceramics of (Bi1/2Na1/2)TiO3-BiFeO3 System , 1999 .

[24]  V. Schmidt,et al.  Conductivity across random barrier distribution as origin of large low-frequency dielectric peak in perovskite crystals and ceramics , 1996 .

[25]  Tadashi Takenaka,et al.  (Bi1/2Na1/2)TiO3-BaTiO3 System for Lead-Free Piezoelectric Ceramics , 1991 .

[26]  J. Burfoot,et al.  Grain-size and pressure effects on the dielectric and piezoelectric properties of hot-pressed PZT-5 , 1974 .