Influence of Sm3+ doping on the dielectric properties of CaCu3Ti4O12 ceramics synthesized via autocombustion
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Data
2014-02-01
Autores
Lopera, Alex
Ramirez, Miguel Angel [UNESP]
Garcia, Claudia
Paucar, Carlos
Marin, Jairo
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Ca-1 -xSmxCu3Ti4O12 (x = 0.0, 0.2, 03) electronic ceramics were fabricated via the chemical route using metal nitrate solutions in order to improve the dielectric properties of this ceramic. X-ray diffraction (XRD) analysis indicated the formation of a single CaCu3Ti4O12 (CCTO). Grain size of the samples doped with Sm3+ was in the range of 1-2 mu m, as opposed to 50-100 mu m in the pure samples of CCTO. The cutoff frequency with the doping was remarkably shifted, from 1 MHz (pure CCTO) to 10 MHz (doped CCTO). Meanwhile, the real dielectric (epsilon(r)) and imaginary dielectric (epsilon '') constants showed a decrease as the doping was increased. (C) 2013 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
CCTO, Samarium, Citrate-nitrate route, Dielectric properties
Como citar
Inorganic Chemistry Communications. Amsterdam: Elsevier Science Bv, v. 40, p. 5-7, 2014.