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Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 3: 433 - 437

DOI: https://doi.org/10.3724/sp.j.1077.2009.00433

Research Paper

Structure and Properties of (K0.5Na0.5)1-2xSrx(Nb0.94 Sb0.06)O3 Lead-free Piezoelectric Ceramics

  • FAN Gui-Fen ,
  • LUWen-Zhong ,
  • RAO Yuan-Yuan
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  • 1.Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; 2.College of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Received date: 2008-07-21

  Revised date: 2008-09-18

  Online published: 2009-05-20

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Abstract

Leadfree piezoelectric ceramics (K0.5Na0.5)1-2xSrx(Nb0.94 Sb0.06)O3 (abbreviated as KNSNS1000x) were synthesized by the conventional ceramic sintering technique. The structure and electrical properties of KNSNS1000x ceramics were investigated. The results of XRD indicate that KNSNS1000x ceramics have an orthorhombic structure. The proper content of Sr substitute increases the density of ceramics which reaches the maximum value of 4.411g/cm3 at x=0.008. With the increase of the amount of Sr, the Tc decreases and the temperature of orthorhombictetragonal phase transition (To-t) is almost a constant.In the temperature range from 0℃ to 200℃, dielectric constant of KNSNS1000x ceramics is independent of frequency. The KNSNS8 ceramics obtains the optimum piezoelectric properties: d33=155pC/N, kp=0.361，Qm=120，Np=2862，Pr=23μC/cm2，Ec=1.4kV/mm，ρ=4.411g/cm3.

Key words： leadfree piezoelectric ceramics; sodium potassium niobate; piezoelectric properties

Cite this article

FAN Gui-Fen , LUWen-Zhong , RAO Yuan-Yuan . Structure and Properties of (K0.5Na0.5)1-2xSrx(Nb0.94 Sb0.06)O3 Lead-free Piezoelectric Ceramics[J]. Journal of Inorganic Materials, 2009 , 24(3) : 433 -437 . DOI: 10.3724/sp.j.1077.2009.00433

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