Issue 21, 2017

Colossal permittivity of (Mg + Nb) co-doped TiO2 ceramics with low dielectric loss

Abstract

A high dielectric loss is one of the difficulties that hinder the application of colossal permittivity (CP) materials. Here we report the CP behaviors in ceramics of rutile (Mg + Nb) co-doped TiO2, i.e., (Mg1/3Nb2/3)xTi1−xO2. The room-temperature dielectric properties of the pure homogenous ceramics include a relatively high CP (>104) and an acceptable dielectric loss (<0.1) at frequencies from 102 to 105 Hz in the doping concentration range of 0.5% to 7%. In particular, an excellent low dielectric loss of 0.0083 and a high dielectric permittivity of 3.87 × 104 at 1 kHz were obtained for the 1% doped sample. Moreover, the temperature stability (room temperature ∼ 180 °C) and frequency stability (102–105 Hz) of the CP properties were studied. X-ray photoelectron spectroscopy suggests that the superior CP properties could be explained by the electron-pinned defect-dipole mechanism.

Graphical abstract: Colossal permittivity of (Mg + Nb) co-doped TiO2 ceramics with low dielectric loss

Article information

Article type
Paper
Submitted
09 Mar 2017
Accepted
03 May 2017
First published
05 May 2017

J. Mater. Chem. C, 2017,5, 5170-5175

Colossal permittivity of (Mg + Nb) co-doped TiO2 ceramics with low dielectric loss

C. Yang, M. Tse, X. Wei and J. Hao, J. Mater. Chem. C, 2017, 5, 5170 DOI: 10.1039/C7TC01020F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements