DOI: 10.1111/jace.14861. Dielectric and electric relaxations induced by the complex defect clusters in (Yb+Nb) co‐doped rutile TiO<sub>2</sub> ceramics

Dielectric and electric relaxations induced by the complex defect clusters in (Yb+Nb) co‐doped rutile TiO2 ceramics

10.1111/jace.14861

Crossref journal-article

Wiley

Journal of the American Ceramic Society (311)

Abstract

AbstractThe effect of the Yb+Nb substitution for Ti on the microstructure, crystal structures, and dielectric properties of (Yb1/2Nb1/2)xTi1−xO2 (0.01≤x≤0.1) ceramics is investigated in this study. The results reveal that the solid solubility limit of the (Yb1/2Nb1/2)xTi1−xO2 ceramics is x=0.07, and the average grain sizes considerably decrease from 12 μm to 6 μm with x increasing from 0.01 to 0.1. Three types of dielectric relaxations are observed at temperature ranges of 10‐30 K, 80‐180 K, and 260‐300 K, caused by the electron‐pinned defect dipoles, polaron hopping, and interfacial polarizations, respectively. The conduction mechanism changes from nearest‐neighbor‐hopping to polaron hopping mechanism, which is confirmed by ac conductivity measurements. The present work indentifies the correlation between the colossal permittivity and polaron hopping process in the titled compound.

Bibliography

Zhao, X., & Liu, P. (2017). Dielectric and electric relaxations induced by the complex defect clusters in (Yb+Nb) coâdoped rutile TiO2 ceramics. Journal of the American Ceramic Society, 100(8), 3505â3513. Portico.

Authors 2

Xiao‐gang Zhao (first)
Peng Liu (additional)

References 39 Referenced 67

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Dates

Type	When
Created	8 years, 4 months ago (April 21, 2017, 5:12 a.m.)
Deposited	1 year, 11 months ago (Sept. 14, 2023, 8:21 a.m.)
Indexed	4 weeks, 1 day ago (July 30, 2025, 8:34 p.m.)
Issued	8 years, 4 months ago (April 21, 2017)
Published	8 years, 4 months ago (April 21, 2017)
Published Online	8 years, 4 months ago (April 21, 2017)
Published Print	8 years ago (Aug. 1, 2017)

Funders 1

National Natural Science Foundation of China 10.13039/501100001809
Region: Asia
gov (National government)
Labels11
1. Chinese National Science Foundation
2. Natural Science Foundation of China
3. National Science Foundation of China
4. NNSF of China
5. NSF of China
6. 国家自然科学基金委员会
7. National Nature Science Foundation of China
8. Guójiā Zìrán Kēxué Jījīn Wěiyuánhuì
9. NSFC
10. NNSF
11. NNSFC
Awards1
1. 51572162

BibTeX

@article{Zhao_2017, title={Dielectric and electric relaxations induced by the complex defect clusters in (Yb+Nb) co‐doped rutile TiO2 ceramics}, volume={100}, ISSN={1551-2916}, url={http://dx.doi.org/10.1111/jace.14861}, DOI={10.1111/jace.14861}, number={8}, journal={Journal of the American Ceramic Society}, publisher={Wiley}, author={Zhao, Xiao‐gang and Liu, Peng}, year={2017}, month=apr, pages={3505–3513} }

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