Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor
|Wang, H. and Yang, Q. and Jia, G. and Lei, R. and Wang, S. and Xu, S. 2014. Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor. Advanced Powder Technology. 25 (1): pp. 450-456.
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.
|Influence of yttrium dopant on the synthesis of ultrafine AlN powders by CRN route from a sol-gel low temperature combustion precursor
|Advanced Powder Technology
|Nanochemistry Research Institute
|Fulltext not available
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