| Mechanism and kinetics analysis of AlN combustion synthesis |
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| 作者姓名： | 郑永挺 张宇民 赫晓东 刘长青 |
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| 作者单位： | Center for Composite Materials，Harbin Institute of Technology，Harbin 150001，China，Center for Composite Materials，Harbin Institute of Technology，Harbin 150001，China，Center for Composite Materials，Harbin Institute of Technology，Harbin 150001，China，Center for Composite Materials，Harbin Institute of Technology，Harbin 150001，China |
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| 摘 要： | 0 INTRODUCTIONAluminumnitride (AlN)isamaterialwhichpossess esoutstandingelectricalandthermalpropertiessuchashighthermalconductivity ,lowthermalexpansion ,gooddielectricstrength ,goodresistancetocorrosionandero sion ,andhighhardness .Presently ,AlNceramicisfind ingincreasedusageinsubstratesandpackaging ,cru cibles ,firingtilesandthermalfillersinpolymers ,adhe sivesandpottingcompounds1] .Thetypicalcombustionsynthesis ,orself propagatinghigh temperaturesynthesis ,istheoldestandmostwell kn…
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Mechanism and kinetics analysis of AlN combustion synthesis |
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| ZHENG Yong-ting,ZHANG Yu-min,HE Xiao-dong,LIU Chang-qing.Mechanism and kinetics analysis of AlN combustion synthesis[J].Journal of Harbin Institute of Technology,2004,11(1). |
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| Authors: | ZHENG Yong-ting ZHANG Yu-min HE Xiao-dong LIU Chang-qing |
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| Affiliation: | Center for Composite Materials,Harbin Institute of Technology,Harbin 150001,China |
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| Abstract: | Mechanism of AlN combustion synthesis was studied by DSC analysis and "quenching" experiment of combustion wave. In preheating region, Al powder melted at 660 ℃ and became spherical because of surface tension. In reaction region, Al volatilized rapidly at 1 000 ℃ and Al vapor reacted with N2 to form AlN, which nucleated and grew on the surface of AlN formed precedently as a diluent. Based on the experiment analysis,kinetics equations and modeling were established. Analysis showed the dramatic effect of temperature, aluminum particle size and nitrogen pressure on the reaction speed. |
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| Keywords: | reaction kinetics aluminum nitride (AlN) combustion synthesis |
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