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首页> 外文期刊>Japanese journal of applied physics >Dielectric and Piezoelectric Characteristics in Lead-Free Lix(K_(0.5)Na_(0.5))_(1-x)(Nb_(0.8)Ta_(0.2))O_3 Piezoelectric Ceramics Prepared by Two-Step Calcination Method
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Dielectric and Piezoelectric Characteristics in Lead-Free Lix(K_(0.5)Na_(0.5))_(1-x)(Nb_(0.8)Ta_(0.2))O_3 Piezoelectric Ceramics Prepared by Two-Step Calcination Method

机译：两步煅烧法制备无铅Lix（K_（0.5）Na_（0.5））_（1-x）（Nb_（0.8）Ta_（0.2））O_3压电陶瓷的介电和压电特性

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摘要

Lead-free Li_X(K_(0.5)Na_(0.5))_(1-x)(Nb_(0.8)Ta_(0.2))O_3 piezoelectric ceramics samples prepared by the conventional solid-state reaction and two-step calcination method were achieved and compared. The effects of the amount of Li_2O_3 on the phase structure, microstructure, dielectric, and piezoelectric properties of Li_X(K_(0.5)Na_(0.5))_(1-x)(Nb_(0.8)Ta_(0.2))O_3 ceramics samples were systematically discussed and investigated. It was found that the Li_2O_3 content in Li_X(K_(0.5)Na_(0.5))_(1-x)(Nb_(0.8)Ta_(0.2))O_3 ceramics samples strongly affects the structure and electrical properties. For the two-step calcination method, the lead-free ceramics samples exhibited excellent dielectric and piezoelectric properties. The relative dielectric constant (ε_r) and loss tangent (tan δ) of the lead-free Li_X(K_(0.5)Na_(0.5))_(1-x)(Nb_(0.8)Ta_(0.2))O_3 piezoelectric ceramics samples for x = 0.03 compositions prepared by the two-step calcination method were 1223 and 0.021, respectively, in addition, the electromechanical coupling factor (k_P) and Curie temperature (T_c) were 48.5% and 315℃, respectively. These results show that Li_X(K_(0.5)Na_(0.5))_(1-x)(Nb_(0.8)Ta_(0.2))O_3 ceramics samples are promising candidates for lead-free piezoelectric materials.
机译：获得了通过常规固相反应和两步煅烧方法制备的无铅Li_X（K_（0.5）Na_（0.5））_（1-x）（Nb_（0.8）Ta_（0.2））O_3压电陶瓷样品并进行比较。 Li_2O_3的含量对Li_X（K_（0.5）Na_（0.5））_（1-x）（Nb_（0.8）Ta_（0.2））O_3陶瓷样品的相结构，微观结构，介电常数和压电性能的影响被系统地讨论和调查。发现Li_X（K_（0.5）Na_（0.5））_（1-x）（Nb_（0.8）Ta_（0.2））O_3陶瓷样品中的Li_2O_3含量强烈影响结构和电性能。对于两步煅烧方法，无铅陶瓷样品表现出优异的介电和压电性能。无铅Li_X（K_（0.5）Na_（0.5））_（1-x）（Nb_（0.8）Ta_（0.2））O_3压电陶瓷样品的相对介电常数（ε_r）和损耗角正切（tanδ）对于x ＝ 0.03，通过两步煅烧方法制备的组合物分别为1223和0.021，此外，机电耦合因子（k_P）和居里温度（T_c）分别为48.5％和315℃。这些结果表明，Li_X（K_（0.5）Na_（0.5））_（1-x）（Nb_（0.8）Ta_（0.2））O_3陶瓷样品是无铅压电材料的有希望的候选者。

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  • 来源
    《Japanese journal of applied physics》 |2012年第9issue3期|09MD11.1-09MD11.5|共5页
  • 作者

    Kai-Huang Chen; Chien-Min Cheng; Jen-Hwan Tsai; Chin-Hsiung Liao; Shu-Hua Liang;

  • 作者单位

    Department of Electronics Engineering and Computer Science, Tung-Fang Design University, Kaohsiung 829, Taiwan, R.O.C.;

    Department of Electronic Engineering, Southern Taiwan University, Tainan 700, Taiwan, R.O.C.;

    Department of Mathematics and Physics, Chinese Air Force Academy, Kangshan, Kaohsiung 804, Taiwan, R.O.C.;

    Department of Physics, Military Academy, Fengshan, Kaohsiung 830, Taiwan, R.O.C.;

    Department of Electronic Engineering, Southern Taiwan University, Tainan 700, Taiwan, R.O.C.;

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