Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT

Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT

La0.67LixTi1-xAlxO3 ceramics (x = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30) were synthesized with the use of Al2O3 and an aqueous solution of Al(NO3)3 as an aluminium source. In both cases, the ceramics preserve a high dielectric constant ε ~ 105. It was found that the single-phase La0.6...

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Datum:2023
Hauptverfasser: Plutenko, Tetiana, V'yunov, Oleg, Fedorchuk, Oleksandr, Yanchevskii, Oleg, Torchyniuk, Pavlo
Format: Artikel
Sprache:English
Veröffentlicht: V.I.Vernadsky Institute of General and Inorganic Chemistry 2023
Online Zugang:https://ucj.org.ua/index.php/journal/article/view/555
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Назва журналу:Ukrainian Chemistry Journal

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Ukrainian Chemistry Journal
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spelling oai:ojs2.1444248.nisspano.web.hosting-test.net:article-5552023-09-07T08:25:27Z Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT Plutenko, Tetiana V'yunov, Oleg Fedorchuk, Oleksandr Yanchevskii, Oleg Torchyniuk, Pavlo Li-containing, aluminium nitrate, microelectronics, perovskite, solid-state reaction technique. La0.67LixTi1-xAlxO3 ceramics (x = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30) were synthesized with the use of Al2O3 and an aqueous solution of Al(NO3)3 as an aluminium source. In both cases, the ceramics preserve a high dielectric constant ε ~ 105. It was found that the single-phase La0.67LixTi1-xAlxO3 perovskite structure is formed at temperatures above 1200  C. It was shown that the use of Al(NO3)3 allows simplifying the synthesis: reduction in the sintering temperature by 20  C, Li loss and, as a result, an increase in the density of ceramics. Ceramics La0.67Li0.15Ti0.85Al0.15O3 with a maximum density higher than 85 % were sintered at about 1280 and 1300  C of with the use of Al(NO3)3 and Al2O3 respectively. Frequency spectra of ima­ginary parts of impedance and electrical modulus demonstrate two dispersion regions that refer to processes in the ceramic grains’ boundaries and ceramic grains. Ceramic samples synthesized using Al(NO3)3 solutions tend to exhibit higher dielectric constants than those synthesized using Al2O3. At a frequency of 100 Hz, the dielectric constant for ceramics synthesized using Al(NO3)3 aqueous solution is 70600, whereas that for ceramics synthesized using Al2O3 is 44300. Obtained materials are useful for microelectronics, energy storage and harvesting devices. V.I.Vernadsky Institute of General and Inorganic Chemistry 2023-07-28 Article Article Inorganic Chemistry Неорганическая химия Неорганічна хімія application/pdf https://ucj.org.ua/index.php/journal/article/view/555 10.33609/2708-129X.89.06.2023.71-78 Ukrainian Chemistry Journal; Vol 89 No 6 (2023): Ukrainian Chemistry Journal; 71-78 Украинский химический журнал; Том 89 № 6 (2023): Ukrainian Chemistry Journal; 71-78 Український хімічний журнал; Том 89 № 6 (2023): Ukrainian Chemistry Journal; 71-78 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/555/285
institution Ukrainian Chemistry Journal
baseUrl_str
datestamp_date 2023-09-07T08:25:27Z
collection OJS
language English
topic_facet Li-containing
aluminium nitrate
microelectronics
perovskite
solid-state reaction technique.
format Article
author Plutenko, Tetiana
V'yunov, Oleg
Fedorchuk, Oleksandr
Yanchevskii, Oleg
Torchyniuk, Pavlo
spellingShingle Plutenko, Tetiana
V'yunov, Oleg
Fedorchuk, Oleksandr
Yanchevskii, Oleg
Torchyniuk, Pavlo
Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT
author_facet Plutenko, Tetiana
V'yunov, Oleg
Fedorchuk, Oleksandr
Yanchevskii, Oleg
Torchyniuk, Pavlo
author_sort Plutenko, Tetiana
title Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT
title_short Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT
title_full Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT
title_fullStr Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT
title_full_unstemmed Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT
title_sort al-doped lanthanum-lithium titanate with high dielectric constant
description La0.67LixTi1-xAlxO3 ceramics (x = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30) were synthesized with the use of Al2O3 and an aqueous solution of Al(NO3)3 as an aluminium source. In both cases, the ceramics preserve a high dielectric constant ε ~ 105. It was found that the single-phase La0.67LixTi1-xAlxO3 perovskite structure is formed at temperatures above 1200  C. It was shown that the use of Al(NO3)3 allows simplifying the synthesis: reduction in the sintering temperature by 20  C, Li loss and, as a result, an increase in the density of ceramics. Ceramics La0.67Li0.15Ti0.85Al0.15O3 with a maximum density higher than 85 % were sintered at about 1280 and 1300  C of with the use of Al(NO3)3 and Al2O3 respectively. Frequency spectra of ima­ginary parts of impedance and electrical modulus demonstrate two dispersion regions that refer to processes in the ceramic grains’ boundaries and ceramic grains. Ceramic samples synthesized using Al(NO3)3 solutions tend to exhibit higher dielectric constants than those synthesized using Al2O3. At a frequency of 100 Hz, the dielectric constant for ceramics synthesized using Al(NO3)3 aqueous solution is 70600, whereas that for ceramics synthesized using Al2O3 is 44300. Obtained materials are useful for microelectronics, energy storage and harvesting devices.
publisher V.I.Vernadsky Institute of General and Inorganic Chemistry
publishDate 2023
url https://ucj.org.ua/index.php/journal/article/view/555
work_keys_str_mv AT plutenkotetiana aldopedlanthanumlithiumtitanatewithhighdielectricconstant
AT vyunovoleg aldopedlanthanumlithiumtitanatewithhighdielectricconstant
AT fedorchukoleksandr aldopedlanthanumlithiumtitanatewithhighdielectricconstant
AT yanchevskiioleg aldopedlanthanumlithiumtitanatewithhighdielectricconstant
AT torchyniukpavlo aldopedlanthanumlithiumtitanatewithhighdielectricconstant
first_indexed 2025-09-24T17:43:51Z
last_indexed 2025-09-24T17:43:51Z
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