4.5 Article

Acceptor-donor concentration dependent polaronic relaxation, pinned electron defect dipole characteristic and colossal permittivity in co-doped rutile (Zn1/3Nb2/3)xTi(1-x)O2 (x=0.02, 0.04, 0.06 and 0,08) ceramics

期刊

PHYSICA B-CONDENSED MATTER
卷 640, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.physb.2022.414082

关键词

Rutile; Co -doped TiO (2); Colossal permittivity; Dielectric properties; Dielectric relaxation

向作者/读者索取更多资源

Colossal permittivity with low loss tangent has been achieved by co-substitution of Zn and Nb in TiO2. The incorporation of divalent and pentavalent ions has been confirmed by structural and Raman spectroscopic analysis. Specific ratio of acceptor-donor pairs has led to observation of colossal permittivity with a low loss tangent. Evidence of localized donor electrons in the dielectric response shows the generation of electron pinned defect dipoles.
Colossal permittivity with low loss tangent has been achieved by co-substitution of Zn and Nb in TiO2. Incor-poration of the divalent and pentavalent ions has been confirmed by structural and Raman spectroscopic analysis. Specific ratio of acceptor-donor pairs led to observation of colossal permittivity (~10(4)) with a low loss tangent (< 0.1). Evidence of localized donor electrons in the dielectric response shows the generation of electron pinned defect dipoles. Low-temperature dielectric relaxation has been observed which correspond to the polaronic conduction following Arrhenius law. As the acceptor-donor content increases, the polaronic relaxation dynamics occurs at higher temperatures. This also reveals that the defect complexes are strongly correlated. Permittivity values corresponding to the loss tangent minima have been compared as a function of acceptor-donor content. Finally, optimum sintering temperature, frequency, measurement temperature, and composi-tion have been identified.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据