A comparative study of Yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods
In this work, 10 mol% yttrium-doped ceria powders, Ce0.9Y0.1O1.95, were synthesised using a new mechanical technique, mechanochemical reaction, in which both impact action and shearing forces were applied for efficient fine grinding, subsequently leading to higher homogeneity of the resultant powder...
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| Format: | Article |
| Language: | English |
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Universiti Putra Malaysia Press
2014
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| Online Access: | http://psasir.upm.edu.my/id/eprint/40555/1/41.%20A%20comparative%20study%20of%20Yttrium%20doped%20ceria%20ceramics%20synthesized%20using%20mechanochemical%20and%20solid%20state%20methods.pdf |
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| author | Ong, Poh Shing Tan, Yen Ping Yap, Taufiq Yun Hin Zainal, Zulkarnain |
| author_facet | Ong, Poh Shing Tan, Yen Ping Yap, Taufiq Yun Hin Zainal, Zulkarnain |
| author_sort | Ong, Poh Shing |
| collection | UPM |
| description | In this work, 10 mol% yttrium-doped ceria powders, Ce0.9Y0.1O1.95, were synthesised using a new mechanical technique, mechanochemical reaction, in which both impact action and shearing forces were applied for efficient fine grinding, subsequently leading to higher homogeneity of the resultant powders. Ce0.9Y0.1O1.95 prepared using this new technique was systematically compared with a sample of the same prepared using conventional solid-state methodology. X-ray diffraction analysis showed all prepared samples were single phase with a cubic fluorite structure. Generally, Y2O3-doped CeO2 electrolytes prepared by mechanochemical reactions were stable at a lower temperature (1100 °C) compared with a sample of the same synthesised using the conventional solid-state method. Characterisations using differential thermal analysis (DTA) and thermogravimetric analysis (TGA) showed no thermal changes and phase transitions, indicating all materials were thermally stable. The electrical properties of the samples investigated by AC impedance spectroscopy in the temperature range 200–800 ˚C are presented and discussed. Scanning electron microscopy (SEM) was used to study the morphology of the materials. Fine-grained powders with uniform grain-size distribution were obtained from the mechanochemical reaction. |
| first_indexed | 2024-03-06T08:47:24Z |
| format | Article |
| id | upm.eprints-40555 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T08:47:24Z |
| publishDate | 2014 |
| publisher | Universiti Putra Malaysia Press |
| record_format | dspace |
| spelling | upm.eprints-405552016-11-29T07:13:15Z http://psasir.upm.edu.my/id/eprint/40555/ A comparative study of Yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods Ong, Poh Shing Tan, Yen Ping Yap, Taufiq Yun Hin Zainal, Zulkarnain In this work, 10 mol% yttrium-doped ceria powders, Ce0.9Y0.1O1.95, were synthesised using a new mechanical technique, mechanochemical reaction, in which both impact action and shearing forces were applied for efficient fine grinding, subsequently leading to higher homogeneity of the resultant powders. Ce0.9Y0.1O1.95 prepared using this new technique was systematically compared with a sample of the same prepared using conventional solid-state methodology. X-ray diffraction analysis showed all prepared samples were single phase with a cubic fluorite structure. Generally, Y2O3-doped CeO2 electrolytes prepared by mechanochemical reactions were stable at a lower temperature (1100 °C) compared with a sample of the same synthesised using the conventional solid-state method. Characterisations using differential thermal analysis (DTA) and thermogravimetric analysis (TGA) showed no thermal changes and phase transitions, indicating all materials were thermally stable. The electrical properties of the samples investigated by AC impedance spectroscopy in the temperature range 200–800 ˚C are presented and discussed. Scanning electron microscopy (SEM) was used to study the morphology of the materials. Fine-grained powders with uniform grain-size distribution were obtained from the mechanochemical reaction. Universiti Putra Malaysia Press 2014 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/40555/1/41.%20A%20comparative%20study%20of%20Yttrium%20doped%20ceria%20ceramics%20synthesized%20using%20mechanochemical%20and%20solid%20state%20methods.pdf Ong, Poh Shing and Tan, Yen Ping and Yap, Taufiq Yun Hin and Zainal, Zulkarnain (2014) A comparative study of Yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods. Pertanika Journal of Science & Technology, 22 (1). pp. 35-42. ISSN 0128-7680; ESSN: 2231-8526 http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JST%20Vol.%2022%20(1)%20Jan.%202014/04%20Page%2035-42%20(JST%200270-2011).pdf |
| spellingShingle | Ong, Poh Shing Tan, Yen Ping Yap, Taufiq Yun Hin Zainal, Zulkarnain A comparative study of Yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods |
| title | A comparative study of Yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods |
| title_full | A comparative study of Yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods |
| title_fullStr | A comparative study of Yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods |
| title_full_unstemmed | A comparative study of Yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods |
| title_short | A comparative study of Yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods |
| title_sort | comparative study of yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods |
| url | http://psasir.upm.edu.my/id/eprint/40555/1/41.%20A%20comparative%20study%20of%20Yttrium%20doped%20ceria%20ceramics%20synthesized%20using%20mechanochemical%20and%20solid%20state%20methods.pdf |
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