A Simple Model for Predicating Dielectric Constant of CaCu3Ti4O12-SrTiO3 Composite Ceramics

Hong Tao Yu; Wen Bo Zhang; Jing Song Liu; Lin Hong Cao; Han Xing Liu

doi:10.4028/www.scientific.net/MSF.689.24

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HomeMaterials Science ForumMaterials Science Forum Vol. 689A Simple Model for Predicating Dielectric Constant...

A Simple Model for Predicating Dielectric Constant of CaCu₃Ti₄O₁₂-SrTiO₃ Composite Ceramics

Abstract:

In this work, we have proposed a simple model to predicte the dielectric constant of CaCu₃Ti₄O₁₂-SrTiO₃ composite ceramics. The model has been established based on the analysis of composition and microstructure. Two different compositions in the composite ceramics correspond to two different grain sizes, large for CaCu₃Ti₄O₁₂, and small for SrTiO₃, which has been identified by the x-ray diffraction, the scanning electron microscope and the energy spectrum analysis. All specimens have been assumed to be the barrier layer dielectrics in the model, according to the complex impedance spectra. The dielectric constant of serial, parallel, and logarithmic mixture models has been discussed. Compared with the experimental results, the model shows the similar variation tendency as SrTiO₃ content increases.

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Periodical:

Materials Science Forum (Volume 689)

Pages:

24-28

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.689.24

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Online since:

June 2011

Authors:

Hong Tao Yu, Wen Bo Zhang, Jing Song Liu, Lin Hong Cao, Han Xing Liu

Keywords:

Barrier Layer, CaCu₃Ti₄O₁₂ (CCTO), Dielectric Constant

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