Dielectric properties of sintered BaTiO3 prepared from barium acetate and titanium dioxide
Abstract In this paper, we investigated the densification, microstructure and dielectric properties of BaTiO3 derived from aqueous barium acetate and titanium dioxide mixture in both the unmilled and milled forms. The sintered pellets showed a great difference in the microstructure and dielectric...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-08-01
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| Series: | Kuwait Journal of Science |
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| Online Access: | https://journalskuwait.org/kjs/index.php/KJS/article/view/7006 |
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| author | Kolthoum Ismail Othman M. El Sayed Ali S. El-Hout |
| author_facet | Kolthoum Ismail Othman M. El Sayed Ali S. El-Hout |
| author_sort | Kolthoum Ismail Othman |
| collection | DOAJ |
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Abstract
In this paper, we investigated the densification, microstructure and dielectric properties of BaTiO3 derived from aqueous barium acetate and titanium dioxide mixture in both the unmilled and milled forms. The sintered pellets showed a great difference in the microstructure and dielectric properties between the milled and unmilled ones. The unmilled samples showed broadening in the permittivity peaks at Curie temperature and a higher permittivity value (5630) at room temperature. They exhibit a dielectric relaxor-like behaviour and relatively stable permittivity. This was attributed to the presence of a thin shell layer of barium-rich phase at the grain boundaries. Despite milling gives a better homogeneity, it destroys the shell layer and results in a classic barium titanate dielectric behaviour.
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| format | Article |
| id | doaj-art-c87578e593224babbcd627a5a40e9253 |
| institution | OA Journals |
| issn | 2307-4108 2307-4116 |
| language | English |
| publishDate | 2019-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Kuwait Journal of Science |
| spelling | doaj-art-c87578e593224babbcd627a5a40e92532025-08-20T02:03:38ZengElsevierKuwait Journal of Science2307-41082307-41162019-08-01463Dielectric properties of sintered BaTiO3 prepared from barium acetate and titanium dioxideKolthoum Ismail Othman0M. El Sayed Ali1S. El-Hout2Egyptian Atomic energy authorityMetallurgy Dept., NRC, Atomic Energy Authority, Cairo, EgyptMetallurgy Dept., NRC, Atomic Energy Authority, Cairo, Egypt. Abstract In this paper, we investigated the densification, microstructure and dielectric properties of BaTiO3 derived from aqueous barium acetate and titanium dioxide mixture in both the unmilled and milled forms. The sintered pellets showed a great difference in the microstructure and dielectric properties between the milled and unmilled ones. The unmilled samples showed broadening in the permittivity peaks at Curie temperature and a higher permittivity value (5630) at room temperature. They exhibit a dielectric relaxor-like behaviour and relatively stable permittivity. This was attributed to the presence of a thin shell layer of barium-rich phase at the grain boundaries. Despite milling gives a better homogeneity, it destroys the shell layer and results in a classic barium titanate dielectric behaviour. https://journalskuwait.org/kjs/index.php/KJS/article/view/7006Barium titanatebarium acetatedielectric propertiessintering & microstructure |
| spellingShingle | Kolthoum Ismail Othman M. El Sayed Ali S. El-Hout Dielectric properties of sintered BaTiO3 prepared from barium acetate and titanium dioxide Kuwait Journal of Science Barium titanate barium acetate dielectric properties sintering & microstructure |
| title | Dielectric properties of sintered BaTiO3 prepared from barium acetate and titanium dioxide |
| title_full | Dielectric properties of sintered BaTiO3 prepared from barium acetate and titanium dioxide |
| title_fullStr | Dielectric properties of sintered BaTiO3 prepared from barium acetate and titanium dioxide |
| title_full_unstemmed | Dielectric properties of sintered BaTiO3 prepared from barium acetate and titanium dioxide |
| title_short | Dielectric properties of sintered BaTiO3 prepared from barium acetate and titanium dioxide |
| title_sort | dielectric properties of sintered batio3 prepared from barium acetate and titanium dioxide |
| topic | Barium titanate barium acetate dielectric properties sintering & microstructure |
| url | https://journalskuwait.org/kjs/index.php/KJS/article/view/7006 |
| work_keys_str_mv | AT kolthoumismailothman dielectricpropertiesofsinteredbatio3preparedfrombariumacetateandtitaniumdioxide AT melsayedali dielectricpropertiesofsinteredbatio3preparedfrombariumacetateandtitaniumdioxide AT selhout dielectricpropertiesofsinteredbatio3preparedfrombariumacetateandtitaniumdioxide |