Enhanced pyroelectric and piezoelectric responses in W/Mn-codoped Bi4Ti3O12 Aurivillius ceramics
Enhanced pyroelectric and piezoelectric responses in W/Mn-codoped Bi4Ti3O12 Aurivillius ceramics
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W/Mn 共掺杂 Bi4Ti3O12 Aurivilius 陶瓷中增强的热释电和压电响应
DOI：
10.1016/j.jeurceramsoc.2018.08.025
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发表时间：
2018
影响因子：
5.7
通讯作者：
Zhang Shujun
中科院分区：
文献类型：
--
作者：
Tang Yanxue;Shen Zong-Yang;Du Qiuxiang;Zhao Xiangyong;Wang Feifei;Qin Xiaomei;Wang Tao;Shi Wangzhou;Sun Dazhi;Zhou Zhiyong;Zhang Shujun
研究了4at%Mn掺杂的Bi4Ti2.9W0.1O12（BiTW-Mn）Aurivillius陶瓷的热释电和压电性能，并与传统固相反应法制备的Bi4Ti2.9W0.1O12（BiTW）陶瓷进行了比较.在10 0 ° C时，W掺杂和W/Mn共掺杂BiT陶瓷的电阻率分别达到4 9 × 10 12和2 5 × 10 11 Ω cm。它们表现出相似的激活能和离子-p型混合导电机制。W/Mn共掺陶瓷的热释电系数为57.1 μC/m2 K，压电系数为21 pC/N，介电损耗为0.003。这些性质的变化主要是由Mn Ti− Vo缺陷偶极子引起的。受体掺杂的效果证明了由内部偏置场，所示的水平偏移的极化场的行为。改进的性能以及高热稳定性表明BiTW-Mn可能是高温下热释电和压电器件的有希望的候选者。
The pyroelectric and piezoelectric properties of 4 at% Mn-doped Bi 4 Ti 2.9 W 0.1 O 12 (BiTW-Mn) Aurivillius ceramic were investigated and compared to Bi 4 Ti 2.9 W 0.1 O 12 (BiTW) counterpart, which were fabricated using a conventional solid state reaction method. High resistivities of 4.9× 10 12 and 2.5× 10 11 Ω cm at 100° C were obtained in the W-doped and W/Mn-codoped BiT ceramics, respectively. They showed similar activation energies and ionic-p-type mixed conduction mechanisms. Higher pyroelectric coefficients of 57.1 μC/m 2 K and piezoelectric coefficients of 21 pC/N, as well as much lower dielectric loss of 0.003 were achieved in W/Mn-codoped ceramics. These property changes were mainly induced by M n Ti− V o defect dipoles. The effect of acceptor doping was evidenced by an internal bias field, shown by a horizontal offset in the polarization-field behavior. The improved properties together with high thermal stability indicate that BiTW-Mn may be a promising candidate for pyroelectric and piezoelectric devices at elevated temperatures.