Electrochemical properties of Bi4Ti3 – xCrxO12 – 0.5x (0.4 ≤ x ≤ 1.2) solid solutions with a layered perovskite structure
- Авторлар: Sekushin N.1, Koroleva M.1, Piir I.1
-
Мекемелер:
- Institute of Chemistry, Komi Scientific Centre, Ural Branch
- Шығарылым: Том 52, № 11 (2016)
- Беттер: 1032-1040
- Бөлім: Article
- URL: https://journals.rcsi.science/1023-1935/article/view/188243
- DOI: https://doi.org/10.1134/S1023193516110100
- ID: 188243
Дәйексөз келтіру
Аннотация
Chromium-containing bismuth titanates Bi4Ti3–xCrxO12–δ (0 ≤ x ≤ 1.2) with a layered perovskite structure and with the number of layers in the perovskite-like unit m = 3 at x ≤ 0.5 and m = 4 at 0.5 < x ≤ 1.2 were synthesized by the solid state method. The electrochemical properties of Bi4Ti1.8Cr1.2O11.38 (m = 4) and Bi4Ti2.6Cr0.4O11.8 (m = 3) were studied by impedance spectroscopy and DC electric conductivity measurements in different gas media. The oxygen conductivity increased at temperatures (t) of 450–500°C. For the samples with m = 4 at t ≥ 500°C in the frequency range of the order of a few Hz, the imaginary part of impedance was inverted, which was explained by the electrochemical process on electrodes. At t ≥ 600°C a reversible breakdown of the Bi4Ti2.6Cr0.4O11.8 sample in an electric field of over 30 V/m was observed. It was concluded that the conductivity of Bi4Ti3–xCrxO12–δ is of electron-ion type.
Авторлар туралы
N. Sekushin
Institute of Chemistry, Komi Scientific Centre, Ural Branch
Хат алмасуға жауапты Автор.
Email: sekushin-na@chemi.komisc.ru
Ресей, Syktyvkar, 167982
M. Koroleva
Institute of Chemistry, Komi Scientific Centre, Ural Branch
Email: sekushin-na@chemi.komisc.ru
Ресей, Syktyvkar, 167982
I. Piir
Institute of Chemistry, Komi Scientific Centre, Ural Branch
Email: sekushin-na@chemi.komisc.ru
Ресей, Syktyvkar, 167982