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- Title
Effect of BiFeO doping on the structural, dielectric and electrical properties of CaCuTiO ceramics.
- Authors
Dai, Haiyang; Liu, Dewei; Chen, Jing; Xue, Renzhong; Li, Tao; Xiang, Huiwen; Chen, Zhenping; Liu, Haizeng
- Abstract
(1 − x)CaCuTiO- xBiFeO ( x = 0, 0.003, 0.006, 0.010 and 0.015) ceramics have been fabricated by the solid-state reaction method. The effects of BiFeO (BFO) doping on the microstructure, dielectric and electrical properties of CaCuTiO (CCTO) ceramics were investigated. It is found that BFO doping can affect the microstructure of the CCTO ceramics, and some properties of CCTO ceramics can hence be improved by BFO doping. The XRD and Raman results show that no phase transition has occurred in the doping content range, but BFO doping induces the crystal structure distortion. Analysis of microstructure indicates that the grain morphology varies significantly with increasing BFO content, and an appropriate amount of BFO can promote the grain growth. Impedance spectroscopy results show that the dielectric constant and loss of the BFO-doped CCTO samples are stable with frequency. The dielectric constant and nonohmic properties can be enhanced markedly in an appropriate doping content. The dielectric loss of all BFO-doped samples was lower than that of undoped CCTO sample in low frequencies. The related mechanism is also discussed in the paper.
- Subjects
BISMUTH compounds; CERAMIC metals; SOLID state chemistry; DIELECTRIC loss; PERMITTIVITY; MICROSTRUCTURE
- Publication
Applied Physics A: Materials Science & Processing, 2015, Vol 119, Issue 1, p233
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-014-8952-8