Dielectric Properties of Barium Titanate Ceramics Modified by CuO in Different Methods

Abstract:

CuO has been doped solely and together with BaO and SiO₂ into barium titanate by mixing and calcination. X-ray diffraction showed that the sample doped by CuO-BaO has stable second hexagonal phase while the samples doped by CuO, CuO-SiO₂ were of a pure perovskite phase. For CuO-BaO doping, the Curie temperature was decreased accompanied with higher εmax; while for CuO doping and CuO-SiO₂ codoping, the Curie temperature was increased with εmax decreased. The difference can be explained considering that Cu²⁺ ion could not only incorporate into the BaTiO₃ lattice, but also assemble in the boundary phase when CuO was doped solely. Besides, the mechanisms of CuO doping and SiO₂ doping could happen at one time.

• Periodical: Advanced Materials Research (Volumes 463-464)
• Pages: 276-280
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.463-464.276
• Online since: February 2012
• Authors: Dan Su, Yu Wang, Wan Ping Chen, Helen Lai Wah Chan, Li Na Bing
• Keywords: BaO, Barium Titanate Ceramics, CuO, Dielectric Property, Doping, SiO₂

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