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首页> 外文期刊>Journal of materials science >Piezoelectric and ferroelectric property in Mn-doped 0.69BiFeO_3-0.04Bi(Zn_(1/2)Ti_(1/2))O_3-0.27BaTiO_3 lead-free piezoceramics
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Piezoelectric and ferroelectric property in Mn-doped 0.69BiFeO_3-0.04Bi(Zn_(1/2)Ti_(1/2))O_3-0.27BaTiO_3 lead-free piezoceramics

机译：Mn掺杂0.69BiFeO_3-0.04Bi（Zn_（1/2）Ti_（1/2））O_3-0.27BaTiO_3无铅压电陶瓷的压电和铁电性能

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摘要

In this article, rhombohedral 0.69BiFeO_3-0.04Bi(Zn_(1/2)Ti_(1/2))O_3-0.27BaTiO_3 (BF69-BZT4-BT27) lead-free piezoceramics were studied for the sake of obtaining high Curie point and piezoresponse. In compositional engineering approach, A-site vacancies with various concentrations were introduced in advance into ferroelectric ceramics by using low purities of raw oxides and doping MnO_2. In contrast to lossy BF-BT ceramics, very low dielectric loss tanδ ~ 0.03 was obtained in the BF69-BZT4-BT27 ceramics through adding BZT third member to stabilize perovskite phase and doping MnO_2 to reduce oxygen vacancies with a refined solid state reaction electroceramic processing. A good combination of ferroelectric and piezoelectric property was obtained in the 0.17 wt% MnO_2-doped BF69-BZT4-BT27 coarse-grained ceramics with remanent polarization of P_r - 32.3 μC/cm~2, piezoelectric constant of d_(33) - 145 pC/N, thickness electromechanical coupling coefficient of k_t = 0.41 and Curie temperature of T_c = 510 ℃. The intrinsic piezoelectric response was observed in correlation with ferroelectric polarization switching power described by dielectric constant, which is affected by some extrinsic factors such as point defects, microstructure grain size, and residual internal stresses. Excellent thermal aging stability of piezoelectric constant d_(33) were also experimentally demonstrated and argued resulting from the higher T_c and no ferroelectric-ferroelectric structural phase transition below T_c of BF-BZT-BT system.
机译：在本文中，为了获得高居里点，研究了菱形的0.69BiFeO_3-0.04Bi（Zn_（1/2）Ti_（1/2））O_3-0.27BaTiO_3（BF69-BZT4-BT27）无铅压电陶瓷。压电响应。在成分工程方法中，通过使用低纯度的原始氧化物和掺杂MnO_2，预先将各种浓度的A位空位引入铁电陶瓷中。与有损BF-BT陶瓷相反，通过添加BZT第三元素来稳定钙钛矿相并掺杂MnO_2以减少氧空位，采用精细的固态反应电瓷工艺，在BF69-BZT4-BT27陶瓷中获得的介电损耗tanδ〜0.03极低。在残留极化率为P_r-32.3μC/ cm〜2，压电常数为d_（33）-145 pC的0.17 wt％MnO_2掺杂BF69-BZT4-BT27粗粒陶瓷中，获得了铁电和压电特性的良好组合。 / N，厚度机电耦合系数k_t = 0.41，居里温度T_c = 510℃。观察到固有压电响应与介电常数描述的铁电极化开关功率相关，该功率受一些非固有因素的影响，例如点缺陷，微结构晶粒尺寸和残余内应力。还通过实验证明并证明了压电常数d_（33）的出色的热老化稳定性，这是由较高的T_c和低于BF-BZT-BT系统的T_c的铁电-铁电结构相变引起的。

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  • 来源
    《Journal of materials science》 |2016年第2期|1955-1965|共11页
  • 作者

    Yang Lin; Linlin Zhang; Jian Yu;

  • 作者单位

    Functional Materials Research Laboratory and Key Laboratory of Advanced Civil Engineering Materials (Ministry of Education), School of Materials Science and Engineering, Tongji University, Shanghai 201800, China;

    Functional Materials Research Laboratory and Key Laboratory of Advanced Civil Engineering Materials (Ministry of Education), School of Materials Science and Engineering, Tongji University, Shanghai 201800, China;

    Functional Materials Research Laboratory and Key Laboratory of Advanced Civil Engineering Materials (Ministry of Education), School of Materials Science and Engineering, Tongji University, Shanghai 201800, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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