DOI: 10.1111/jace.15196. Colossal permittivity in TiO<sub>2</sub> co‐doped by donor Nb and isovalent Zr

Colossal permittivity in TiO2 co‐doped by donor Nb and isovalent Zr

10.1111/jace.15196

Crossref journal-article

Wiley

Journal of the American Ceramic Society (311)

Abstract

AbstractEffect of isovalent Zr dopant on the colossal permittivity (CP) properties was investigated in (Zr + Nb) co‐doped rutile TiO2 ceramics, i.e., Nb0.5%ZrxTi1−xO2. Compared with those of single Nb‐doped TiO2, the CP properties of co‐doped samples showed better frequency‐stability with lower dielectric losses. Especially, a CP up to 6.4 × 104 and a relatively low dielectric loss (0.029) of x = 2% sample were obtained at 1 kHz and room temperature. Moreover, both dielectric permittivity and loss were nearly independent of direct current bias, and measuring temperature from room temperature to around 100°C. Based on X‐ray photoelectron spectroscopy, the formation of oxygen vacancies was suppressed due to the incorporation of Zrions. Furthermore, it induced the enhancement of the conduction activation energy according to the impedance spectroscopy. The results will provide a new routine to achieve a low dielectric loss in the CP materials.

Bibliography

Yang, C., Wei, X., & Hao, J. (2017). Colossal permittivity in TiO2 coâdoped by donor Nb and isovalent Zr. Journal of the American Ceramic Society, 101(1), 307â315. Portico.

Authors 3

Chao Yang (first)
Xianhua Wei (additional)
Jianhua Hao (additional)

References 43 Referenced 86

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Dates

Type	When
Created	8 years ago (Aug. 29, 2017, 7:03 p.m.)
Deposited	1 year, 11 months ago (Sept. 16, 2023, 10:45 p.m.)
Indexed	1 month ago (Aug. 2, 2025, 12:51 a.m.)
Issued	7 years, 11 months ago (Sept. 13, 2017)
Published	7 years, 11 months ago (Sept. 13, 2017)
Published Online	7 years, 11 months ago (Sept. 13, 2017)
Published Print	7 years, 8 months ago (Jan. 1, 2018)

Funders 3

The Open Project of the State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials
Awards1
1. 11zxfk17
Program for Young Science and Technology Innovation Team of Sichuan Province
Awards1
1. 2017TD0020
the grant Research Grants Council of Hong Kong
Awards1
1. PolyU 153004/14P

BibTeX

@article{Yang_2017, title={Colossal permittivity in TiO2 co‐doped by donor Nb and isovalent Zr}, volume={101}, ISSN={1551-2916}, url={http://dx.doi.org/10.1111/jace.15196}, DOI={10.1111/jace.15196}, number={1}, journal={Journal of the American Ceramic Society}, publisher={Wiley}, author={Yang, Chao and Wei, Xianhua and Hao, Jianhua}, year={2017}, month=sep, pages={307–315} }

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