Enhanced piezoelectric and ferroelectric properties in Mn-doped Na0.5Bi0.5TiO3-BaTiO3 single crystals

High piezoelectric and ferroelectric properties have been found in Mn-doped Na0.5Bi0.5TiO3–BaTiO3 single crystals, which were grown by a top-seeded solution method. The electrical resistivity, dielectric constant, and ferroelectric and piezoelectric properties were all found to be notably enhanced by Mn. The piezoelectric constant d33 and electromechanical coupling coefficients kt and k31 were found to be as high as 483 pC/N, 0.56, and 0.40, respectively. These values are much higher than those previously reported for Pb-free piezoelectric crystals, demonstrating the real potential for alternative lead-free systems for sensor and piezoelectric applications.

[1]  Di Lin,et al.  Crystal growth and high piezoelectric performance of 0.95Na0.5Bi0.5TiO3–0.05BaTiO3 lead-free ferroelectric materials , 2008 .

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

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

[4]  C. Tai,et al.  Ferroelectric Domain Morphology Evolution and Octahedral Tilting in Lead‐Free (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3–(Bi1/2Li1/2)TiO3–BaTiO3 Ceramics at Different Temperatures , 2008, 1103.5836.

[5]  G. Haertling.  Ferroelectric ceramics : History and technology , 1999 .

[6]  Chunsheng Zhao,et al.  Cylinder-shaped ultrasonic motors 4.8mm in diameter using electroactive piezoelectric materials , 2007 .

[7]  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.

[8]  D. Szwagierczak,et al.  Influence of MnO2 and Co3O4 dopants on dielectric properties of Pb(Fe2/3W1/3)O3 ceramics , 2005 .

[9]  Guifen Fan,et al.  Effects of manganese additive on piezoelectric properties of (Bi1/2Na1/2)TiO3–BaTiO3 ferroelectric ceramics , 2007 .

[10]  In-Tae Kim,et al.  Ferroic phase transitions in (Na1/2Bi1/2)TiO3 crystals , 1996 .

[11]  H. Nagata,et al.  Additive effects on electrical properties of (Bi1/2Na1/2)TiO3 ferroelectric ceramics , 2001 .

[12]  X. Zhou,et al.  Piezoelectric properties of Mn-doped (Na0.5Bi0.5)0.92Ba0.08TiO3 ceramics , 2005 .

[13]  L. Luo,et al.  Effects of Mn doping on dielectric and piezoelectric properties of 0.71Pb(Mg1∕3Nb2∕3)O3–0.29PbTiO3 single crystals , 2007 .

[14]  H. Gu,et al.  Lead-free In2O3-doped (Bi0.5Na0.5)0.93Ba0.07TiO3 ceramics synthesized by direct reaction sintering , 2007 .

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

[16]  Y. Noguchi,et al.  Defect control for low leakage current in K0.5Na0.5NbO3 single crystals , 2006 .

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