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Influence of Sn and Pb Ions Substitutions on Dielectric Properties of Barium Titanate

Bąk W., Kajtoch C., Ptaszek S., Lisińska-Czekaj A., Czekaj D., Ziętek D., Glos T., Garbarz-Glos B.

Archives of Metallurgy and Materials

2016

Vol. 61, iss. 2A

905--908

The results of the microstructural and dielectric measurements of (Ba1-xPbx)(Ti1-xSnx)O3 (BPTSx) (x = 0, 0.05, 0.10, 0.30) polycrystalline samples are presented. The samples were obtained by means of a high temperature synthesis and their expected stoichiometry was confirmed by energy dispersive spectroscopy (EDS) measurements. The dielectric properties of BPTSx were studied with the use of broadband dielectric spectroscopy. The measurements over a wide range of temperature (from 140 K to 600 K) and frequency (from 0.1 Hz to 10 MHz) were performed. The experimental results indicate an influence of Pb ions in a sublattice A and Sn ions in a sublattice B substitution on paraelectric - ferroelectric phase transition parameters. Diffused phase transitions from a paraelectric to ferroelectric state (for x = 0.10 and x = 0.30) were observed. From the electric modulus measurements in the frequency domain the relaxation times and the activation energy were determined.

Diffused phase transition in polycrystalline (Ba0.70Pb0.30)(Ti0.70Sn0.30)O3

Ziętek D.

Czasopismo Techniczne. Chemia

2014

R. 111, z. 1-Ch

149--155

In this paper, the method of manufacturing solid solution (Ba0.70Pb0.30)(Ti0.70Sn0.30)O3 (BP30TS30) is presented. Dielectric spectroscopy and scanning electron microscopy methods were applied to investigate the influence of doping by Pb and Sn on the physical properties of BaTiO3 (BT). It is shown that Pb and Sn substitutions change the temperature of phase transitions, their character and the maximum value of electric permittivity.

W artykule przedstawiono metodę otrzymywania stałego roztworu (Ba0.70Pb0.30)(Ti0.70Sn0.30)O3 (BP30TS30). Badania przeprowadzone za pomocą spektroskopii dielektrycznej i skaningowej mikroskopii elektronowej miały na celu sprawdzenie wpływu domieszkowania jonami ołowiu i cyny na własności BaTiO3 (BT). Wykazano, iż domieszki Pb i Sn zmieniają zarówno temperaturę przemian fazowych, ich charakter, jak i maksymalną wartość przenikalności elektrycznej.