Piezoelectric and dielectric properties of (Na_<0.5>K_<0.5>)NbO_3Bi_<0.5>(Na_<0.8>K_<0.2>)_<0.5>TiO_3 lead-free ceramics

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概要

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• Lead-free piezoelectric ceramics (1-x)(Na_<0.5>K_<0.5>)NbO_3-xBi_<0.5>(Na_<0.8>K_<0.2>)_<0.5>TiO_3 (abbreviated as NKN-BNKT1OO_x, with x ranges from 0 to 0.08 mol) have been synthesized by a conventional solid state sintering method. The effects of amount of BNKT-content on electrical properties and crystalline structures have been investigated. X-ray diffraction analysis showed that a morphotropic phase boundaries (MPB) between orthorhombic and tetragonal phases exists in the composition range of 0.05 < x < 0.06, near which the dielectric and piezoelectric properties are enhanced. The NKN-BNKT5 ceramics exhibits good properties (d_<33> = 216pC/N, k_p = 41%, ε_<33>T/ε_o = 1315). These results indicate that NKN-BNKT100x ceramic is a promising lead-free piezoelectric candidate material.

• 社団法人日本セラミックス協会の論文
• 2008-05-01

著者

• CHEN Zhiwu

  College of Materials Science and Engineering, South China University of Technology

• He Xinhua

  Key Lab Of Specially Functional Materials Of Ministry Of Education Coll. Of Materials Sci. & Eng

• Chen Zhiwu

  Key Lab Of Special Functional Materials Of Ministry Of Education Coll. Of Materials Sci. & Engin

• Hu Jianqiang

  Department Of Chemistry College Of Chemistry And Chemical Engineering South China University Of Tech

• CHEN Zhiwu

  Collage of Materials Science and Engineering, South China University of Technology

• HU Jianqiang

  School of Chemical Science, South China University of Technology

• HE Xinhua

  Collage of Materials Science and Engineering, South China University of Technology

• He Xinhau

  Collage of Materials Science and Engineering, South China University of Technology

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• Piezoelectric and Dielectric Properties of (Na0.5K0.5)NbO3–(Bi0.5Na0.5)0.94Ba0.06TiO3 Lead-Free Piezoelectric Ceramics

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