Jump to main content
Jump to site search


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

Author affiliations

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

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 09 Mar 2017, accepted on 03 May 2017 and first published on 05 May 2017


Article type: Paper
DOI: 10.1039/C7TC01020F
Citation: J. Mater. Chem. C, 2017, Advance Article
  •   Request permissions

    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, Advance Article , DOI: 10.1039/C7TC01020F

Search articles by author