| Piezoelectric and dielectric properties of Lix（K0.46Na0.54） 1-xNb0.86Ta0.1 Sb0.04O3 lead-free ceramics |
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| 引用本文： | 陈志武,胡建强.Piezoelectric and dielectric properties of Lix（K0.46Na0.54） 1-xNb0.86Ta0.1 Sb0.04O3 lead-free ceramics[J].中国有色金属学会会刊,2008,18(3):623-626. |
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| 作者姓名： | 陈志武 胡建强 |
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| 作者单位： | CHEN Zhi-wu（College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China） ;
HU Jian-qiang（School of Chemical Science,South China University of Technology,Guangzhou 510640,China） ; |
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| 基金项目： | 国家自然科学基金，Key Laboratory of Silicate Materials Science and Engineering (Wuhan University of Technology) |
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| 摘 要： | Lead-free piezoelectric ceramics Lix（K0.46Na0.54）1-xNb0.86Ta0.1Sb0.0403 （with x ranging from 0 to 0.1） were synthesized by conventional solid state sintering method. The effect of cationic substitution of Li for K and Na in the A sites of perovskite lattice on the structure, phase transition behavior and electrical properties were investigated. Morphotropic phase boundaries（MPB） between orthorhombic and tetragonal phase are found in the composition range of 0.06≤x≤0.08. Analogous to Pb（Zr, Ti）O3, the dielectric and piezoelectric properties are enhanced for the composition near the morphotropic phase boundary. The Li0.06（K0.46Na0.54）0.94- Nb0.86Ta0.1Sb0.04O3 ceramics show excellent electrical properties, that is, piezoelectric constant d33=215 pC/N, planar electromechanical coupling factor kp=41%, dielectric constant ε33^T /ε0=1 303, and dielectric loss tan δ=2.45%. The results indicate that Lix（K0.46Na0.54）1 -xNb0.86Ta0.1Sb0.0403 ceramic is a promising lead-free piezoelectric material.
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| 关 键 词： | 陶瓷工艺 压电陶瓷 电介质 压电性能 |
Piezoelectric and dielectric properties of Lix(K0.46Na0.54)1-xNb0.86Ta0.1Sb0.04O3 lead-free ceramics |
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| CHEN Zhi-wu,HU Jian-qiang.Piezoelectric and dielectric properties of Lix(K0.46Na0.54)1-xNb0.86Ta0.1Sb0.04O3 lead-free ceramics[J].Transactions of Nonferrous Metals Society of China,2008,18(3):623-626. |
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| Authors: | CHEN Zhi-wu HU Jian-qiang |
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| Affiliation: | [1]College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China [2]School of Chemical Science, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | Lead-free piezoelectric ceramics Lix(K0.46Na0.54)1-xNb0.86Ta0.1Sb0.04O3 (with x ranging from 0 to 0.1) were synthesized by conventional solid state sintering method.The effect of cationic substitution of Li for K and Na in the A sites of perovskite lattice on the structure,phase transition behavior and electrical properties were investigated.Morphotropic phase boundaries (MPB) between orthorhombic and tetragonal phase are found in the composition range of 0.06≤x≤0.08.Analogous to Pb (Zr,Ti) O3,the dielectric and piezoelectric properties are enhanced for the composition near the morphotropic phase boundary.The Li0.06 (K0.46Na0.54)0.94-Nb0 86Ta0.1Sb0.04O3 ceramics show excellent electrical properties,that is,piezoelectric constant,d33=215 pC/N,planar electromechanical coupling factor kp=41%,dielectric constant εT33/ε0=1303,and dielectric loss tanδ=2.45%.The results indicate that Lix (K0.46Na0.54)1-xNb0.86Ta0.1Sb0.04O3 ceramic is a promising lead-free piezoelectric material. |
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| Keywords: | lead-free ceramics piezoelectric ceramics piezoelectric property dielectric property |
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