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Issue 54, 2016, Issue in Progress
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Colossal permittivity and impedance analysis of niobium and aluminum co-doped TiO2 ceramics

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Abstract

Niobium and aluminum co-doped TiO2 ceramics, i.e., (Nb0.5Al0.5)xTi1−xO2 (x = 0, 0.01, 0.05, 0.1, 0.15, abbreviated as NAT100x) were synthesized via a solid-state reaction route. As could be seen from X-ray diffraction (XRD) patterns, all samples were in pure rutile phases. A colossal permittivity (CP) over 105 with relatively low dielectric loss could be noted in the NAT10 ceramic. Additionally, the high dielectric permittivity (>105) could be maintained over a wide temperature range of −100–250 °C and frequency range of 102 to 106 Hz, respectively. This indicated that the dielectric property of NAT10 possessed superior temperature-dependent and frequency-dependent stability. Analysis of impedance spectroscopy and current density vs. electric field plots revealed that the CP was attributed to an internal barrier layer capacitance effect.

Graphical abstract: Colossal permittivity and impedance analysis of niobium and aluminum co-doped TiO2 ceramics

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Article information


Submitted
24 Mar 2016
Accepted
11 May 2016
First published
12 May 2016

RSC Adv., 2016,6, 48708-48714
Article type
Paper

Colossal permittivity and impedance analysis of niobium and aluminum co-doped TiO2 ceramics

G. Liu, H. Fan, J. Xu, Z. Liu and Y. Zhao, RSC Adv., 2016, 6, 48708
DOI: 10.1039/C6RA07746C

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