Study on Defect Complexes in High-K Sr and Zr Co-Doped BaTiO3 Ceramics

Da Yong Lu; Xiu Yun Sun

doi:10.4028/www.scientific.net/AMR.750-752.501

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 750-752Study on Defect Complexes in High-K Sr and Zr...

Study on Defect Complexes in High-K Sr and Zr Co-Doped BaTiO₃ Ceramics

Abstract:

In order to investigate the evidence for the formation of Sr²⁺-Zr⁴⁺ defect complexes in high-k Sr and Zr co-doped BaTiO₃ ceramics, BaTiO₃, (Ba_0.85Sr_0.15)TiO₃, Ba (Ti_0.8Zr_0.2)O₃, and (Ba_0.85Sr_0.15)(Ti_0.8Zr_0.2)O₃ (BS15TZ20) ceramics were prepared using a mixed oxide method. The Y5V-type BS15TZ20 shows a high-k diffuse phase transition behavior (ε ́_m = 8000) and its Curie peak occurs near room temperature. The evolution in crystal structure and in dielectric property for the four samples gives four evidences for the formation of Sr²⁺-Zr⁴⁺ defect complexes in BS15TZ20. The splitting of the 720 cm^-1 Raman band does not relate to Sr²⁺-Zr⁴⁺ defect complexes, but to a multiphonon (A₁ (TO₂) + A₁ (TO₃)).

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Advanced Materials Research (Volumes 750-752)

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501-505

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https://doi.org/10.4028/www.scientific.net/AMR.750-752.501

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August 2013

Authors:

Da Yong Lu*, Xiu Yun Sun

Keywords:

Defect Complexes, Dielectric Property, Perovskites, Raman Spectroscopy, X-Ray Diffraction (XRD)

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