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首页> 外文期刊>Journal of Materials Science: Materials in Electronics >Effect of simultaneous double doping in Ba and Ti sites on dielectric and ferroelectric properties of sol–gel synthesized nano-BaTiO3
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Effect of simultaneous double doping in Ba and Ti sites on dielectric and ferroelectric properties of sol–gel synthesized nano-BaTiO3

机译：钡和钛位同时掺杂对溶胶-凝胶法合成纳米BaTiO 3 的介电和铁电性能的影响

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摘要

Lead free (Ba(1−3x)Nd(2x))(Ti(1−y)Zry)O3 (x = 0, 0.025, y = 0, 0.025, 0.05) ceramics were prepared successfully using sol–gel method. The effect of Nd, Zr content on dielectric and polarisation properties of BaTiO3 were studied using dielectric and hysteresis measurements. SEM analysis proved that the particle size of compounds as prepared were in the order of 30–60 nm. The ferroelectric phase transition from tetragonal to cubic phase was observed around 130 °C for pure BaTiO3. With the addition of Nd (2.5 mol%) and increasing content of Zr (2.5 and 5 mol%), it was observed that transition temperature (Tc) shifts to lower temperatures (70–50 °C), but didn’t show any relaxor behaviour. Dielectric measurements showed an increase in the values at room temperature in all the doped samples. The synthesized ceramics exhibited typical P–E hysteresis loops at room temperature accompanied by saturation polarisation (Ps) and remanent polarisation (Pr). Behaviour of polarisation phenomena in these compounds showed interesting results with increasing temperature.
机译：无铅（Ba （1-3x） Nd （2x））（Ti （1-y） Zr y ）O 3 （x = 0，0.025，y = 0，0.025，0.05）用溶胶-凝胶法成功制备了陶瓷。利用介电和磁滞测量研究了Nd，Zr含量对BaTiO 3 的介电和极化性能的影响。 SEM分析表明，所制备化合物的粒径约为30-60 nm。对于纯BaTiO 3 ，在130°C左右观察到铁电相由四方相转变为立方相。观察到随着Nd（2.5 mol％）和Zr含量（2.5和5 mol％）的增加，转变温度（T c ）转变为更低的温度（70–50°C） ），但未显示任何放松行为。介电测量显示所有掺杂样品在室温下的值均增加。合成陶瓷在室温下表现出典型的PE磁滞回线，并伴有饱和极化（P s ）和剩余极化（P r ）。这些化合物中极化现象的行为随着温度的升高显示出有趣的结果。

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