Abstract

The ceramic oxide K₂Pb₂Gd₂W₂Ti₄Ta₄O₃₀ was synthesized by solid solution route. The formation of compound was checked by using XRD and SEM study, suggesting that material is single phase and dense. Temperature variation of dielectric parameters reveals ferroelectric to paraelectric phase transition. Polarization study confirms the presence of ferroelectricity. The transport property of the material was studied using impedance spectroscopy. The hopping motion of charge carrier was confirmed from the frequency dependent ac conductivity. The values of pyroelectric current and thermistor properties show that the material can be useful for heat sensing applications with a working temperature of about 300 °C.

摘要

陶瓷氧化物K ₂ Pb ₂ Gd ₂ W ₂ Ti ₄ Ta ₄ O ₃₀通过固溶路线合成。通过XRD和SEM研究检查了化合物的形成，表明该材料为单相且致密。介电参数的温度变化揭示了铁电到顺电的相变。极化研究证实了铁电的存在。使用阻抗谱研究了材料的传输性能。从与频率有关的交流电导率可以确定电荷载流子的跳跃运动。热电流和热敏电阻特性的值表明，该材料可用于工作温度约为300°C的热传感应用。