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오윤석

Oh, Yoon Seok
Laboratory for Strong Correlation in Quantum Materials
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Control of structural disorder in spinel ceramics derived from layered double hydroxides

Author(s)
Jeong, Il RokLee, Jun HanSong, JaejungOh, Yoon SeokCho, Seungho
Issued Date
2020-04
DOI
10.1016/j.ceramint.2019.11.145
URI
https://scholarworks.unist.ac.kr/handle/201301/30961
Fulltext
https://www.sciencedirect.com/science/article/pii/S0272884219333358?via%3Dihub
Citation
CERAMICS INTERNATIONAL, v.46, no.5, pp.6594 - 6599
Abstract
Spinel oxides are versatile and functional materials with physicochemical properties that are significantly influenced by their structural disorder. The transition from layered double hydroxides (LDHs) to mixed metal oxides (MMOs) containing spinel oxides is a powerful approach to create materials with tailored properties suitable for various applications. Herein, we report the control of structural ordering in spinels related to the crystallinity, cationic inversion, and coordination number of constituent atoms by varying the transformation energy. Transformation from LDHs to spinels with higher applied energy leads to higher crystallinity, lower degree of inversion, and lower ratios of low-coordinated atoms to fully coordinated atoms after treatment with acid. We provide a general framework for controlling structural ordering, that can be applied to other spinels and metal oxides. In addition, LDHs and MMOs possess many chemical and structural degrees of freedom, making it possible to create materials that suit the needs of different applications, such as memory, sensors, catalysis, and energy conversion.
Publisher
Pergamon Press Ltd.
ISSN
0272-8842
Keyword (Author)
SpinelsLayered double hydroxidesStructural disorderCeramicsComposites
Keyword
MAGNETIC-PROPERTIESOXIDESTRANSFORMATIONNANOPARTICLESTEMPERATUREPERCENTAGENANOSHEETSOXIDATIONCATALYSTSPATHWAYS

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