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Journal of Electronic Materials

, Volume 44, Issue 1, pp 295–302 | Cite as

Dielectric Properties of Ca0.7Bi0.3Ti0.7Cr0.3O3 (CBTC)–CaCu3Ti4O12 (CCTO) Composite

  • E. J. J. Mallmann
  • M. A. S. Silva
  • A. S. B. Sombra
  • M. A. Botelho
  • S. E. Mazzetto
  • A. S. de  Menezes
  • A. F. L. Almeida
  • P. B. A. FechineEmail author
Article

Abstract

The main object of this work is to study two materials with giant dielectric constants: CaCu3Ti4O12 (CCTO) and Ca0.7Bi0.3Ti0.7Cr0.3O3 (CBTC). CBTC1−x –CCTO x composites were also obtained to create a new dielectric material with dielectric properties between these two phases. Structural properties were studied by x-ray powder diffraction (XRPD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy and dielectric measurements. CCTO showed a cubic phase and CBTC an orthorhombic phase. An interesting result was that the dielectric constant (K) did not follow the rule of the mixture of Lichtnecker, and this happened due to the presence of other phases of its crystalline structure, which decreases the value of K when compared to the predicted values of Lichtnecker. It was also found that the dielectric properties of the composite are very promising for use in microelectronics, according to the miniaturization factor, which is crucial for those applications.

Keywords

CaCu3Ti4O12 dielectric measurements ceramics composite microdevice 

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Notes

Acknowledgements

We gratefully acknowledge the financial support of Brazilian Agencies for Scientific and Technological Development CAPES, Funcap, FAPEMA, IPDI and CNPq.

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Copyright information

© The Minerals, Metals & Materials Society 2014

Authors and Affiliations

  • E. J. J. Mallmann
    • 1
  • M. A. S. Silva
    • 2
  • A. S. B. Sombra
    • 2
  • M. A. Botelho
    • 3
  • S. E. Mazzetto
    • 1
  • A. S. de  Menezes
    • 4
  • A. F. L. Almeida
    • 5
  • P. B. A. Fechine
    • 1
    Email author
  1. 1.Grupo de Química de Materiais Avançados (GQMAT) – Departamento de Química Analítica e Físico-QuímicaUniversidade Federal do Ceará – UFCFortalezaBrazil
  2. 2.Laboratório de Telecomunicações e Ciência e Engenharia de Materiais (LOCEM) – Departamento de FísicaUniversidade Federal do CearáFortalezaBrazil
  3. 3.Post-Graduation Program in BiotechnologyUniversity PotiguarNatal Brazil
  4. 4.Departamento de Física, CCETUniversidade Federal do MaranhãoSão LuísBrazil
  5. 5.Departamento de Engenharia Mecânica e de Produção (DEMP), Centro de TecnologiaUniversidade Federal do CearáFortaleza Brazil

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