摘要
为系统研究掺杂材料LiInCr_(3.6)Fe_(0.4)O_(8)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LiInCr_(4)O_(8)母体和掺杂样品LiInCr_(3.6)Fe_(0.4)O_(8)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。
To systematically study the dielectric properties and relaxation degree of the doped material LiInCr_(3.6)Fe_(0.4)O_(8) at different temperatures and frequencies,the LiInCr_(4)O_(8) matrix and doped sample LiInCr_(3.6)Fe_(0.4)O_(8) 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 distribution 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 between 1 and 2,which further verifies the existence of relaxation or ferroelectric properties.The real impedance Z′ decreases with the increasing of temperature,indicating that the material has a negative temperaturecoefficient 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.
作者
童惠娟
祖佳
张贺
卫静
徐笑笑
边健
王秉正
TONG Huijuan;ZU Jia;ZHANG He;WEI Jing;XU Xiaoxiao;BIAN Jian;WANG Bingzheng(School of Energy,Materials and Chemical Engineering,Hefei University,230601,Hefei,Anhui,China;School of Advanced Manufacturing,Hefei University,230601,Hefei,Anhui,China)
出处
《淮北师范大学学报（自然科学版）》
CAS
2024年第3期38-43,共6页
Journal of Huaibei Normal University：Natural Sciences
基金
安徽省自然科学基金面上项目(2108085ME152)
大学生创新创业训练计划项目(1602898061162450944,S202311059077)。
关键词
掺杂材料
变温介电性质
XRD
弛豫程度
铁电性质
doped materials
temperature-dependent dielectric properties
XRD
relaxation degree
ferro-electric properties
