Journal
MATERIALS LETTERS
Volume 166, Issue -, Pages 192-195Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2015.12.078
Keywords
Ceramics; Dielectric properties; Bulk; Grain boundary; Contact
Funding
- National Natural Science Foundation of China [51572001, 51502001]
- Co-operative Innovation Research Center for Weak Signal Detecting Materials and Devices Integration of Anhui University [Y01008411]
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Ceramic samples of Gd2O3-doped CeO2 (GDC) were fabricated by the co-precipitation method. The dielectric properties were investigated as functions of temperature (350-950 K) and frequency (100 Hz to 10 MHz). Three relaxations with the activation energies of 0.76, 0.88, and 1.03 eV in the order of ascending temperature were observed in GDC. The low-, middle-, and high-temperature relaxations are argued to be related to the bulk response caused by the Gd dopant-oxygen vacancy pairs, grain boundary, and contact effects, respectively. (C) 2015 Elsevier B.V. All rights reserved.
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