Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor
Y-doped ultrafine AlN powders were synthesized by a carbothermal reduction nitridation (CRN) route from precursors of Al2O3, C and Y2O3 prepared by a sol-gel low temperature combustion technology. The Y dopant reacted with alumina and thus forming yttrium aluminate of AlYO3, Al3Y5O12 and Al 2Y4O9, w...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Elsevier
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/8239 |
| _version_ | 1848745596732571648 |
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| author | Wang, H. Yang, Q. Jia, Guohua Lei, R. Wang, S. Xu, S. |
| author_facet | Wang, H. Yang, Q. Jia, Guohua Lei, R. Wang, S. Xu, S. |
| author_sort | Wang, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Y-doped ultrafine AlN powders were synthesized by a carbothermal reduction nitridation (CRN) route from precursors of Al2O3, C and Y2O3 prepared by a sol-gel low temperature combustion technology. The Y dopant reacted with alumina and thus forming yttrium aluminate of AlYO3, Al3Y5O12 and Al 2Y4O9, which formed a liquid at about 1400 C and promoted the transformation of Al2O3 to AlN and the growth of AlN particles. Compared with the conventional solid CRN process, Y dopant reduced the synthesis temperature by 150 C, and Al2O 3 transformed to AlN completely at 1450 C. The content of Y dopant had little effect on the synthesis temperature of AlN whereas it influenced the phase of Y compounds in the products. As the Y/Al molar ratio was in the range of 0.007648-0.022944, the particle sizes of Y-doped AlN powders synthesized at 1450 C were 150-300 nm. © 2013 The Society of Powder Technology Japan. Published by Elsevier B.V. |
| first_indexed | 2025-11-14T06:19:53Z |
| format | Journal Article |
| id | curtin-20.500.11937-8239 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:19:53Z |
| publishDate | 2014 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-82392017-09-13T14:35:06Z Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor Wang, H. Yang, Q. Jia, Guohua Lei, R. Wang, S. Xu, S. Y-doped ultrafine AlN powders were synthesized by a carbothermal reduction nitridation (CRN) route from precursors of Al2O3, C and Y2O3 prepared by a sol-gel low temperature combustion technology. The Y dopant reacted with alumina and thus forming yttrium aluminate of AlYO3, Al3Y5O12 and Al 2Y4O9, which formed a liquid at about 1400 C and promoted the transformation of Al2O3 to AlN and the growth of AlN particles. Compared with the conventional solid CRN process, Y dopant reduced the synthesis temperature by 150 C, and Al2O 3 transformed to AlN completely at 1450 C. The content of Y dopant had little effect on the synthesis temperature of AlN whereas it influenced the phase of Y compounds in the products. As the Y/Al molar ratio was in the range of 0.007648-0.022944, the particle sizes of Y-doped AlN powders synthesized at 1450 C were 150-300 nm. © 2013 The Society of Powder Technology Japan. Published by Elsevier B.V. 2014 Journal Article http://hdl.handle.net/20.500.11937/8239 10.1016/j.apt.2013.07.008 Elsevier restricted |
| spellingShingle | Wang, H. Yang, Q. Jia, Guohua Lei, R. Wang, S. Xu, S. Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor |
| title | Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor |
| title_full | Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor |
| title_fullStr | Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor |
| title_full_unstemmed | Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor |
| title_short | Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor |
| title_sort | influence of yttrium dopant on the synthesis of ultrafine aln powders by crn route from a sol-gel low temperature combustion precursor |
| url | http://hdl.handle.net/20.500.11937/8239 |