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Thermal and electrical properties of CaCu3Ti4O12 synthesized by soft chemistry route

Authors
  • Porfirio, T. C.1, 2
  • Muccillo, E. N. S.1
  • 1 Energy and Nuclear Research Institute – IPEN, São Paulo, SP, 05422-970, Brazil , São Paulo (Brazil)
  • 2 Energy and Nuclear Research Institute, Center of Materials Science and Technology, São Paulo, Brazil , São Paulo (Brazil)
Type
Published Article
Journal
Journal of Thermal Analysis and Calorimetry
Publisher
Springer Netherlands
Publication Date
Mar 19, 2018
Volume
133
Issue
2
Pages
851–857
Identifiers
DOI: 10.1007/s10973-018-7184-0
Source
Springer Nature
Keywords
License
Yellow

Abstract

Calcium copper titanate powders were synthesized by a soft chemistry route, aiming to establish a cost-effective solution method to obtain sintered ceramics with giant electric permittivity (ε′) and low dissipation factor (tanδ). Powders and sintered pellets were characterized by several techniques. The thermal decomposition behavior of the porous foam evidences that a hydroxycitrate was formed below 200 °C. Single cubic perovskite-type phase was obtained after calcination of the precursor powder at 700 °C for 5 h. Negligible mass loss occurs above 400 °C. During heating the precursor material, CuO is the first crystallized phase. A giant ε′ and low tanδ are obtained after sintering. The extension of the thermal window of ε′ is wider than those of powders prepared by other methods.

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