Oxygen-ion and Proton Conductivity in the Ba3InGa2O7.5 Complex Oxide with Incomplete Oxygen Sublattice
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Oxygen-ion and Proton Conductivity in the Ba3InGa2O7.5 Complex Oxide with Incomplete Oxygen Sublattice
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| Автор |
Kochetova, N. A.
Cherepanova, V. A. Pikalova, A. A. Gilev, A. R. |
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| Тематика |
COMPLEX OXIDE
PEROVSKITE-LIKE STRUCTURE STRUCTURAL OXYGEN VACANCIES SOLID ELECTROLYTE OXYGEN-ION CONDUCTIVITY PROTON CONDUCTIVITY |
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| Описание |
Received: 14.12.23. Revised: 28.12.23. Accepted: 29.12.23. Available online: 17.01.24.
The Ba3InGa2O7.5 complex oxide has a A3BB'2O7.5-type structure with structural oxygen vacancies. The Ba3InGa2O7.5 is an oxygen-ion conducting solid electrolyte in dry air at 450–900 °C. The Ba3InGa2O7.5 demonstrates oxygen-ion and proton conductivity in wet air with ~100% proton transfer at 500 °C. The phase undergoes hydrolysis decomposition in wet air at low temperatures. The Ba3InGa2O7.5 complex oxide, possessing the perovskite-related structure with structural oxygen vacancies, was first synthesized by the solid state method. The phase was found to be characterized by monoclinic symmetry (sp. gr. P2/c) with the following unit cell parameters: a = 7.942(1) Å, b = 5.868(5) Å, c = 18.201(6) Å, β = 91.52(9). Comprehensive investigations of electrical properties were carried out; ceramic material based on the complex oxide was shown to be a predominantly ionic conductor in the temperature range 450–900 oC. The conductivity is due to oxygen-ion transfer in dry conditions and oxygen-ion and proton transfer in wet atmosphere. The proton conductivity value is 4.5·10–5 S/cm, and the proton transport number is ~50% at 700 oC in wet air; at lower temperatures, proton transport becomes dominant. Prolonged treatment of the sample in water vapors below 450 oC leads to hydrolysis decomposition. The research funding from the Ministry of Science and Higher Education of the Russian Federation (Ural Federal University Program of Development within the Priority-2030 Program) is gratefully acknowledged. |
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| Дата |
2024-04-02T12:56:35Z
2024-04-02T12:56:35Z 2024 |
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| Тип |
Article
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| Идентификатор |
Oxygen-ion and Proton Conductivity in the Ba3InGa2O7.5 Complex Oxide with Incomplete Oxygen Sublattice / N. Kochetova, V. Cherepanova, A. Pikalova, A. Gilev // Chimica Techno Acta. — 2024. — Vol. 11, No. 1. — No. 202411102.
2411-1414 http://elar.urfu.ru/handle/10995/130138 https://elibrary.ru/item.asp?id=65118501 10.15826/chimtech.2024.11.1.02 |
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| Язык |
en
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| Связанные ресурсы |
Chimica Techno Acta. 2024. Vol. 11. № 1
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| Издатель |
Уральский федеральный университет
Ural Federal University |
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