Electrical and dielectric properties of colossal permittivity co-doped (Er,Pr, Ta) titanium dioxide
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Journal of Physics and Chemistry of Solids
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The electrical and dielectric properties of titanium dioxide containing erbium and praseodymium oxides as acceptors,
and tantalum oxide as donor dopants were investigated aiming to identify the effects of different dopants
on the dielectric properties. Dense samples with 1 mol% total co-dopants were prepared by the solid-state
synthesis method, followed by conventional sintering at 1450 ◦C. A secondary phase, Er2Ti2O7, was found in
some of the prepared samples. Impedance spectroscopy spectra of the samples are similar, with an average
activation energy for interface conduction of about 0.27 ± 0.05 eV, except for the sample with excess Ti,
(Er0.5Ta0.5)0.01Ti1.09O2, (0.38 ± 0.05 eV). All samples exhibit colossal permittivity (>104) in wide temperature
and frequency ranges. Erbium oxide was found to be more effective in increasing the electric permittivity of TiO2
than praseodymium oxide. Excess titanium leads to a larger grain size, and decreases both the permittivity and
the dissipation factor of titanium dioxide.
Como referenciar
FERREIRA, LUCAS A.S.; MUCCILLO, REGINALDO; MUCCILLO, ELIANA N.S. Electrical and dielectric properties of colossal permittivity co-doped (Er,Pr, Ta) titanium dioxide. Journal of Physics and Chemistry of Solids, v. 208, n. 1, p. 1-7, 2026. DOI: 10.1016/j.jpcs.2025.113077. Disponível em: https://repositorio.ipen.br/handle/123456789/49321. Acesso em: 26 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.