电介质
兴奋剂
凝聚态物理
材料科学
极化(电化学)
电场
杂质
偶极子
离子
介电常数
极化密度
磁化
光电子学
化学
磁场
物理
有机化学
物理化学
量子力学
作者
T. V. Panchenko,L. M. Karpova
出处
期刊:Journal of physics and electronics
[Oles Honchar Dnipropetrovsk National University]
日期:2019-12-27
卷期号:27 (2): 85-88
摘要
The temperature-frequency dependences of the complex dielectric permittivity ε and the voltage-farad characteristics of undoped and aluminum doped Bi12SiO20 crystals are studied before and after their polarization. It is shown that Al ions in the Bi12SiO20 dielectric matrix provide a significant increase as well as nonlinearity of ε in the temperature range 300 – 800 K and electric field strengths Е = 103 – 104 V/cm. It is shown that polarization causes the appearance of dielectric hysteresis loops. Al impurity significantly affects the appearance and parameters of these loops. The role of Al ions in increasing the contribution of the quasi-dipole mechanism in the polarization processes is revealed.
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