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ChemInform Abstract: Dielectric Properties of Iron Doped Calcium Copper Titanate, CaCu~2.9~Fe~0.1~Ti~4~O~12~. by Alok Kumar Rai; Nitish Kumar Singh; Sang‐Kwon Lee; K. D. Mandal; D. Kumar; Om Parkash is a Chemistry article available to read on EtoBox.
Dielectric Properties of Iron Doped Calcium Copper Titanate, CaCu 2.9 Fe 0.1 Ti 4 O 12 . -The title compound is prepared by evaporation of a stoichiometric solution of Ca(NO3)2, Cu(NO3)2, Fe(NO3)3, TiO2, and citric acid at 70-80 °C, followed by calcination of the obtained gel in air (800 and 900 °C, 6 h each). The samples are characterized by powder XRD, SEM, XPS, and dielectric measurements in the temperature range 300-500 K. Substitution of Fe 3+ at the Cu site in CaCu 3 Ti 4 O 12 drastically reduces the dielectric constant in the frequency range of 100 Hz to 1 MHz. The decrease in the permittivity is attributed to the suppression of the Ca/Cu disorder in the title compound compared to CaCu3Ti4O12, and the absence of the grain boundary internal barrier layer capacitance mechanism. -(RAI, A.
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- Author
- Alok Kumar Rai; Nitish Kumar Singh; Sang‐Kwon Lee; K. D. Mandal; D. Kumar; Om Parkash
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); Wiley (ISSN 0931-7597)
- Published
- 2011
- Language
- EN
- Field
- Chemistry (Physical Sciences)