Preparation and electric properties of Bi0.5Na0.5TiO3-Bi(Mg0.5Ti0.5)O3 lead-free piezoceramics
Preparation and electric properties of Bi0.5Na0.5TiO3-Bi(Mg0.5Ti0.5)O3 lead-free piezoceramics
复制标题
Bi0.5Na0.5TiO3-Bi(Mg0.5Ti0.5)O3无铅压电陶瓷的制备及电性能
DOI：
10.1111/jace.12147
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发表时间：
2013
影响因子：
3.9
通讯作者：
Xing Xianran
中科院分区：
文献类型：
--
作者：
Wang Qi;Chen Jun;Fan Longlong;Liu Laijun;Fang Liang;Xing Xianran
采用传统的陶瓷制备方法合成了无铅BNT基压电陶瓷，（1−x）Bi0.5Na0.5TiO3-xBi（Mg0.5Ti0.5）O3[（1−x）BNT-xBMT]（0.00 ≤x≤0.06）二元体系。研究了Bi（Mg0.5Ti0.5）O3（BMT）掺杂对室温（RT）晶体结构和电性能的影响。XRD表明形成了纯的钙钛矿相。当x =0.05时，BMT的引入使BNT的EC从7.3降低到4.0 kV/mm，并使d33从58 pC/N增加到110 pC/N。该体系在室温下表现出典型的铁电（FE）极化环P（E）和蝶形双极应变-电（S（E））曲线。对于0.95BNT-0.05BMT的组成，在80°C附近出现反铁电（AFE）相，其特征是收缩的P（E）环和改变的双极S（E）蝶形，并随着温度的升高逐渐占优势。介电常数的温度依赖性表明TC从纯BNT的310°C增加到x =0.05时的352°C。结果表明，Bi（Mg0.5Ti0.5）O3的引入提高了BNT的压电性能。
Lead‐free BNT‐based piezoceramics, (1−x)Bi0.5Na0.5TiO3–xBi(Mg0.5Ti0.5)O3[(1−x)BNT–xBMT] (0.00 ≤x≤0.06) binary system, were synthesized using a conventional ceramic fabrication method. Effect of Bi(Mg0.5Ti0.5)O3(BMT) substitution on room temperature (RT) crystal structure, and temperature dependence of electric properties were investigated. The XRD indicates that a pure perovskite phase is formed. The introduction of BMT decreasesECof BNT from 7.3 to 4.0 kV/mm, and increasesd33from 58 pC/N to 110 pC/N for thex=0.05. The system shows a typical ferroelectric (FE) polarization loopP(E) and butterfly bipolar strain‐electricS(E) curve at RT. For the composition of 0.95BNT–0.05BMT antiferroelectric (AFE) phase appears near 80°C, characterized by a constrictedP(E) loop and altered bipolarS(E) butterfly, and gradually prevails with increasing temperature. Temperature dependence of dielectric constant shows thatTCincreases from 310°C for pure BNT to 352°C for thex=0.05. The results indicate that the piezoelectric properties of BNT have been improved by means of Bi(Mg0.5Ti0.5)O3substitution.