Phase diagrams and electrical properties of (Bi1/2Na1/2)TiO3-based solid solutions

In this study, we demonstrated the relationship between the phase diagrams and the electrical properties of (Bi1/2Na1/2)TiO3 (BNT)-based solid solutions. In this study, (1−x)(Bi1/2Na1/2)TiO3–xNaNbO3 and (1−x)(Bi1/2Na1/2)TiO3–xKNbO3 (abbreviated to BNT-NN100x and BNT-KN100x) ceramics were prepared by a conventional ceramic fabrication process, and (1−x)(Bi1/2Na1/2)TiO3–x(Bi1/2K1/2)TiO3 (abbreviated to BNKT100x) ceramic was prepared for comparison. We revealed the phase transition temperatures, such as the depolarization temperature Td, rhombohedral-tetragonal phase transition temperature TR-T, and the temperature Tm of the maximum dielectric constant, from the temperature dependence of dielectric properties using poled and unpoled specimens. As a result, it was shown that the BNT-based solid solutions form three types of phase diagrams. In addition, we clarified the relationship between the phase diagrams and the electrical properties of BNT-NN100x, BNT-KN100x, and BNKT100x. The piezoelectric properties we...

[1]  Jianguo Zhu,et al.  Temperature Dependence of Electric Properties of [Bi0.5(Na1-xAgx)0.5]1-yBayTiO3 Ceramics , 2007 .

[2]  Y. Chiang,et al.  Relaxor single crystals in the (Bi1/2Na1/2)1−xBaxZryTi1−yO3 system exhibiting high electrostrictive strain , 2001 .

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

[4]  Xiaobing Ren,et al.  Large electric-field-induced strain in ferroelectric crystals by point-defect-mediated reversible domain switching , 2004, Nature materials.

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

[6]  K. Hong,et al.  Phase relations in the system of (Na1/2Bi1/2)TiO3–PbTiO3. I. Structure , 1996 .

[7]  Yet-Ming Chiang,et al.  Lead-free high-strain single-crystal piezoelectrics in the alkaline–bismuth–titanate perovskite family , 1998 .

[8]  H. Nagata,et al.  Phase Transition Temperatures of Divalent and Trivalent Ions Substituted (Bi1/2Na1/2)TiO3 Ceramics , 2007 .

[9]  H. Nagata,et al.  Lead‐Free Piezoelectric Ceramic Based on (Bi1/2Na1/2)TiO3‐(Bi1/2K1/2)TiO3‐BaTiO3 Solid Solution , 2012 .

[10]  Tadashi Takenaka,et al.  Lead-free piezoelectric ceramics based on (Bi1/2Na1/2)TiO3-NaNbO3 , 1997 .

[11]  Yoichiro Masuda,et al.  Ferroelectric and antiferroelectric properties of (Na 0.5Bi 0.5)TiO3-SrTiO3 solid solution ceramics , 1974 .

[12]  X. X. Wang,et al.  Electromechanical and ferroelectric properties of (Bi1∕2Na1∕2)TiO3–(Bi1∕2K1∕2)TiO3–BaTiO3 lead-free piezoelectric ceramics , 2004 .

[13]  H. Nagata,et al.  Phase Transition Temperatures and Piezoelectric Properties of (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3–BaTiO3 Lead-Free Piezoelectric Ceramics , 2006 .

[14]  Etsuo Otsuki,et al.  Dielectric and Piezoelectric Properties of (Bi0.5Na0.5)TiO3–(Bi0.5K0.5)TiO3 Systems , 1999 .

[15]  Takashi Yamamoto,et al.  Ferroelectric Properties of the PbZrO3–PbTiO3 System , 1996 .

[16]  Tu,et al.  Sequence of dielectric anomalies and high-temperature relaxation behavior in Na1/2Bi1/2TiO3. , 1994, Physical review. B, Condensed matter.

[17]  Hajime Nagata,et al.  Large Piezoelectric Constant and High Curie Temperature of Lead-Free Piezoelectric Ceramic Ternary System Based on Bismuth Sodium Titanate-Bismuth Potassium Titanate-Barium Titanate near the Morphotropic Phase Boundary , 2003 .

[18]  Hajime Nagata,et al.  Investigation of Phase Transition Temperatures on (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 and (Bi1/2Na1/2)TiO3-BaTiO3 Lead-free Piezoelectric Ceramics by Electrical Measurements , 2007 .

[19]  Jianguo Zhu,et al.  Piezoelectric and ferroelectric properties of [Bi0.5(Na1−x−yKxLiy)0.5]TiO3 lead-free piezoelectric ceramics , 2006 .

[20]  N. Setter,et al.  The Role of B-Site Cation Disorder in Diffuse Phase-Transition Behavior of Perovskite Ferroelectrics , 1980 .

[21]  Tu,et al.  Critical acoustic behavior of the relaxor ferroelectric Na1/2Bi1/2TiO3 in the intertransition region. , 1995, Physical review. B, Condensed matter.

[22]  H. Nagata,et al.  Piezoelectric Properties of (Bi1/2Na1/2)TiO3-Based Solid Solution for Lead-Free High-Power Applications , 2008 .

[23]  T. Kruzina,et al.  X-ray study of phase transitions in efrroelectric Na0.5Bi0.5TiO3 , 1982 .

[24]  G. Smolensky,et al.  New ferroelectrics of complex composition. IV , 1961 .

[25]  H. Chan,et al.  Structure and electrical properties of (Bi0.5Na0.5)1−x−y−z BaxSryCazTiO3 lead-free piezoelectric ceramics , 2007 .

[26]  T. Takenaka,et al.  Piezoelectric properties in (K0.5Bi0.5)TiO 3-(Na0.5Bi0.5)TiO3-BaTiO 3 lead-free ceramics , 2007, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[27]  Helmut Ehrenberg,et al.  Lead-free piezoceramics with giant strain in the system Bi0.5Na0.5TiO3–BaTiO3–K0.5Na0.5NbO3. II. Temperature dependent properties , 2008 .

[28]  H. Nagata,et al.  Phase transition temperature and electrical properties of (Bi1∕2Na1∕2)TiO3–(Bi1∕2A1∕2)TiO3 (A=Li and K) lead-free ferroelectric ceramics , 2008 .

[29]  Thomas,et al.  The tetragonal phase of Na(0.5)Bi(0.5)TiO3--a new variant of the perovskite structure , 2000, Acta crystallographica. Section B, Structural science.

[30]  R. Roth,et al.  Piezoelectric Properties of Lead Zirconate‐Lead Titanate Solid‐Solution Ceramics , 1954 .

[31]  Y. Noguchi,et al.  Giant strain in lead-free (Bi0.5Na0.5)TiO3-based single crystals , 2008 .

[32]  Pam A. Thomas,et al.  Investigation of the structure and phase transitions in the novel A-site substituted distorted perovskite compound Na(0.5)Bi(0.5)TiO(3). , 2002, Acta crystallographica. Section B, Structural science.

[33]  Jingfeng Li,et al.  Piezoelectric and ferroelectric properties of Bi-compensated (Bi1/2Na1/2 )TiO3-(Bi1/2K1/2)TiO3 lead-free piezoelectric ceramics , 2008 .

[34]  Q. Yin,et al.  Electrical properties of Na1/2Bi1/2TiO3–BaTiO3 ceramics , 2002 .

[35]  Jianguo Zhu,et al.  Synthesis and Properties of [Bi0.5(Na1-xAgx)0.5]1-yBayTiO3 Piezoelectric Ceramics , 2005 .

[36]  A. Safari,et al.  Processing and Electromechanical Properties of (Bi0.5Na0.5)(1−1.5x)LaxTiO3 Ceramics , 1997 .

[37]  H. Nagata,et al.  Fabrication and Electrical Properties of (Bi1/2Na1/2)TiO3-BiAlO3 Ferroelectric Ceramics , 2008 .