Piezoelectric properties in perovskite 0.948(K0.5Na0.5)NbO3–0.052LiSbO3 lead-free ceramics

Lead-free piezoelectric ceramics, with the nominal composition of 0.948(K0.5Na0.5)NbO3–0.052LiSbO3 (KNN-LS5.2), were synthesized by conventional solid-state sintering, and the piezoelectric and electromechanical properties were characterized as a function of temperature. The Curie temperature of the KNN based perovskite material was found to be 368°C with an orthorhombic-tetragonal polymorphic phase transition (TO-T) temperature at approximately ∼35°C. The room temperature dielectric permittivity (e33T∕e0) and loss were found to be 1380 and 2%, respectively, with piezoelectric properties of k33∼62% and d33∼265pC∕N and k31∼30% and d31∼−116pC∕N. The temperature dependence of the properties mimicked the compositional variation seen in the proximity of a morphotropic phase boundary [e.g., lead zirconate titanate (PZT)], with a maxima in the dielectric and piezoelectric properties and a corresponding “softening” of the elastic properties. Unlike that found for PZT-type materials, the modified KNN material exhi...

[1]  Yiping Guo,et al.  (Na0.5K0.5)NbO3–LiTaO3 lead-free piezoelectric ceramics , 2005 .

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

[3]  H. Nagata,et al.  Piezoelectric Properties of BaTiO3–(Bi1/2K1/2)TiO3 Ferroelectric Ceramics , 2004 .

[4]  H. Nagata,et al.  Present Status of Non-Lead-Based Piezoelectric Ceramics , 1998 .

[5]  R. Xie,et al.  Phase diagram and enhanced piezoelectricity in the strontium titanate doped potassium–sodium niobate solid solution , 2005 .

[6]  R. F. Brown,et al.  AN INVESTIGATION OF SOME BARIUM TITANATE COMPOSITIONS FOR TRANSDUCER APPLICATIONS , 1957 .

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

[8]  Bernard Jaffe,et al.  CHAPTER 11 – MANUFACTURE OF PIEZOELECTRIC CERAMICS , 1971 .

[9]  Dragan Damjanovic,et al.  Piezoelectric properties of Li- and Ta-modified (K0.5Na0.5)NbO3 ceramics , 2005 .

[10]  L. Egerton,et al.  Piezoelectric and Dielectric Properties of Ceramics in the System Potassium—Sodium Niobate , 1959 .

[11]  G. Haertling.  PROPERTIES OF HOT-PRESSED FERROELECTRIC ALKALI NIOBATE CERAMICS. , 1967 .

[12]  K. Kikuta,et al.  Processing and Piezoelectric Properties of Lead‐Free (K,Na) (Nb,Ta) O3 Ceramics , 2005 .

[13]  Thomas R. Shrout,et al.  Perovskite (Na0.5K0.5)1−x(LiSb)xNb1−xO3 lead-free piezoceramics , 2006 .

[14]  Jianguo Zhu,et al.  Electrical properties of [Bi1–z(Na1–x–y–zKxLiy)]0.5BazTiO3 multi‐component lead‐free piezoelectric ceramics , 2005 .

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

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

[17]  L. Levinson.  Electronic Ceramics: Properties: Devices, and Applications , 1987 .

[18]  Yiping Guo,et al.  Phase transitional behavior and piezoelectric properties of (Na0.5K0.5)NbO3–LiNbO3 ceramics , 2004 .

[19]  Field-induced piezoelectric response in Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals , 2006 .

[20]  Yasuyoshi Saito,et al.  Lead-free piezoceramics , 2004, Nature.

[21]  C. Randall,et al.  Elastic, piezoelectric, and dielectric characterization of modified BiScO/sub 3/-PbTiO/sub 3/ ceramics , 2005, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[22]  Hajime Nagata,et al.  Current status and prospects of lead-free piezoelectric ceramics , 2005 .

[23]  C. L. Choy,et al.  Study of compressive type accelerometer based on lead-free BNKBT piezoceramics , 2006 .

[24]  R. E. Jaeger,et al.  Hot Pressing of Potassium‐Sodium Niobates , 1962 .