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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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Main Authors: Ong, Poh Shing, Tan, Yen Ping, Yap, Taufiq Yun Hin, Zainal, Zulkarnain
Format: Article
Language:English
Published: Universiti Putra Malaysia Press 2014
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
http://psasir.upm.edu.my/id/eprint/40555/
http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JST%20Vol.%2022%20(1)%20Jan.%202014/04%20Page%2035-42%20(JST%200270-2011).pdf
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spelling my.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
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
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.
format Article
author Ong, Poh Shing
Tan, Yen Ping
Yap, Taufiq Yun Hin
Zainal, Zulkarnain
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
author_facet Ong, Poh Shing
Tan, Yen Ping
Yap, Taufiq Yun Hin
Zainal, Zulkarnain
author_sort Ong, Poh Shing
title 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_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_sort comparative study of yttrium doped ceria ceramics synthesized using mechanochemical and solid state methods
publisher Universiti Putra Malaysia Press
publishDate 2014
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
http://psasir.upm.edu.my/id/eprint/40555/
http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JST%20Vol.%2022%20(1)%20Jan.%202014/04%20Page%2035-42%20(JST%200270-2011).pdf
_version_ 1643832749893615616
score 13.211869

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