| Synthesis of Ultrafine AlN Powders in an Al-O-C-N System |
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| 作者姓名： | 戴遐明 李庆丰 丁明勤 田杰谟 |
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| 作者单位： | DAI Xiaming(戴遐明)，LI Qingfeng(李庆丰)，DING Mingqin(丁明勤)，TIAN Jiemo(田杰谟)Beijing Fine Ceramic Laboratory，Institute of Nuclear Energy and Technology，Tsinghua University，Beijing\ 100084 |
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| 摘 要： | ＩｎｔｒｏｄｕｃｔｉｏｎＡｌｕｍｉｎｕｍｎｉｔｒｉｄｅ（ＡｌＮ）ｈａｓｒｅｃｅｉｖｅｄｍｕｃｈａｔｅｎｔｉｏｎｉｎｔｈｅｅｌｅｃｔｒｏｎｉｃａｎｄｍｅｔａｌｕｒｇｉｃａｌｉｎｄｕｓｔｒｉｅｓｆｏｒｉｔｓｍａｎｙａｔｒａｃｔｉｖｅｐｒｏｐｅｒｔｉｅｓ，...
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Synthesis of Ultrafine AlN Powders in an Al-O-C-N System |
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| DAI Xiaming,LI Qingfeng,DING Mingqin,TIAN Jiemo.Synthesis of Ultrafine AlN Powders in an Al-O-C-N System[J].Tsinghua Science and Technology,1999,4(2). |
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| Authors: | DAI Xiaming LI Qingfeng DING Mingqin TIAN Jiemo |
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| Abstract: | AlN powders were synthesized by both ordinary and modified processes of carbothermal reduction and nitridation in an Al-O-C-N system. In the ordinary process, the AlN phase appeared at 1300℃ for 6h and the nitridation was completed at 1600℃ for 6h. The particle size of the ordinary AlN powders was about 1μm and the specific surface area was 1-1.5m2/g. In the modified process, the nitridation began and was completed at a temperature lower than that for the ordinary process by more than 100K. The particle size was much finer, 0.1-0.2μm, and the specific surface area was about 20m2/g. At some conditions, the AlN whiskers appeared in the powders. The nitridation rate was a function of the temperature and N2 flow rate as well as the reaction period. The results are used to discuss some aspects of the mechanism. |
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| Keywords: | aluminum nitride powder synthesis mechanism |
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