LiInCr3.6Fe0.4O8掺杂材料的变温介电性质
Dielectric Properties of LiInCr3.6Fe0.4O8 Doped Materials at Various Temperatures
童惠娟 1祖佳 1张贺 1卫静 1徐笑笑 1边健 2王秉正2
作者信息
- 1. 合肥大学 能源材料与化工学院,安徽 合肥 230601
- 2. 合肥大学 先进制造工程学院,安徽 合肥 230601
- 折叠
摘要
为系统研究掺杂材料LiInCr3.6Fe0.4O8在不同温度和频率下的介电性质和弛豫程度,使用传统固相法制备LiInCr4O8母体和掺杂样品LiInCr3.6Fe0.4O8陶瓷材料,并对样品进行XRD和SEM图谱分析,显示各元素与其名义组分一致.通过分析样品的粒子分布和变温介电性质,发现母体和掺杂材料的介电常数随温度变化出现峰值,表明存在铁电性质.通过拟合结果得到特征参数γ值在1和2之间,进一步验证弛豫铁电性质的存在.实部阻抗Z′随着温度升高而减小,表明材料具有负温度系数热敏电阻特性.阻抗谱虚部变化规律进一步印证弛豫现象的存在.结果为进一步探索呼吸烧绿石材料的介电性质及其应用提供依据.
Abstract
To systematically study the dielectric properties and relaxation degree of the doped material LiIn-Cr3.6Fe0.4O8 at different temperatures and frequencies,the LiInCr4O8 matrix and doped sample LiInCr3.6Fe0.4O8 ceramics were prepared by the traditional solid-state method,and the XRD and SEM spectra of the samples were analyzed.Each element was consistent with its nominal components.By analyzing the particle distribu-tion and temperature-dependent dielectric properties of the sample,it was found that the dielectric constants of the parent and doped materials showed peaks with the change of temperature,indicating the existence of ferroelectric properties.The value of the characteristic parameter γ obtained from the fitting results is be-tween 1 and 2,which further verifies the existence of relaxation or ferroelectric properties.The real imped-ance Z′decreases with the increasing of temperature,indicating that the material has a negative temperature-coefficient thermistor characteristic.The variation law of the imaginary part of the impedance spectrum further confirms the relaxation phenomenon.These results provide a basis for further investigation of the dielectric properties and applications of breathing pyrochlore materials.
关键词
掺杂材料/变温介电性质/XRD/弛豫程度/铁电性质Key words
doped materials/temperature-dependent dielectric properties/XRD/relaxation degree/ferro-electric properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据