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Perovskite stabilization in Fe- and Mg-doped Pb(Zn1/2W1/2)O3 and their dielectric characteristics
Journal of the European Ceramic Society ( IF 5.7 ) Pub Date : 2018-05-21 , DOI: 10.1016/j.jeurceramsoc.2018.05.027
Woo-Joon Lee , Nam-Kyoung Kim

Stabilization of a perovskite structure by solid-state reaction in as-yet unreported Pb(Zn1/2W1/2)O3 ceramics was attempted with compositional modification. A wide range of fractions of Pb(Fe2/3W1/3)O3 were initially introduced into the host material, and 20 mol% Pb(Mg1/2W1/2)O3 was subsequently added to the resulting composition in order to enhance perovskite formation. The perovskite development yield of 62.5% (without any fraction of Pb(Fe2/3W1/3)O3 introduced) increased with Pb(Fe2/3W1/3)O3 contents and finally reached 99.9%. The lattice parameters of the perovskite structure in the cubic symmetry range decreased steadily from 0.4002 to 0.3979 nm with increasing Pb(Fe2/3W1/3)O3. The relative permittivity values of the ceramics increased from 72 to 4910 (1 MHz) with increasing Pb(Fe2/3W1/3)O3. By contrast, the dielectric maximum temperatures in the cubic perovskite range changed only slightly from -111 to −124 °C (1 MHz), quite insensitive to the compositional modification. Meanwhile, the phase transition changed gradually from sharp to diffuse modes with the Pb(Fe2/3W1/3)O3 substitution.



中文翻译:

Fe和Mg掺杂的Pb(Zn 1/2 W 1/2)O 3中的钙钛矿稳定化及其介电特性

尝试通过固相反应在尚未报告的Pb(Zn 1/2 W 1/2)O 3陶瓷中通过固相反应来稳定钙钛矿结构,并进行成分改性。首先将各种各样的Pb(Fe 2/3 W 1/3)O 3馏分引入主体材料中,然后将20 mol%的Pb(Mg 1/2 W 1/2)O 3添加到主体材料中。组成以增强钙钛矿的形成。的62.5%钙钛矿发展产率(无铅(Fe为任何分数2/3 W¯¯ 1/3)O 3引入)用PB(铁增加2/3 W¯¯三分之一)O 3含量,最终达到99.9%。随着Pb(Fe 2/3 W 1/3)O 3的增加,钙钛矿结构在立方对称范围内的晶格参数从0.4002稳定下降至0.3979 nm 。随着Pb(Fe 2/3 W 1/3)O 3的增加,陶瓷的相对介电常数值从72增加到4910(1 MHz)。相比之下,立方钙钛矿范围内的介电最高温度仅从-111到-124°C(1 MHz)略有变化,对成分变化非常不敏感。同时,在Pb(Fe 2/3 W 1/3)O 3的作用下,相变从尖峰模式逐渐转变为扩散模式。 代换。

更新日期:2018-05-21
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