自蔓延高温合成方法ppt课件

,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Company Logo,*,Click to edit Master title style,自蔓延高温合成方法及其应用,报告人：张浩,组 员：袁恺阳,刘磊峰,曾一明,自蔓延高温合成方法及其应用报告人：张浩,主要内容,SHS,介绍,1,合成实例,2,应用前景,3,Company Logo,主要内容 SHS介绍1合成实例2应用前景3www.theme,2,Company Logo,Company Lo,3,自蔓延高温合成,(,self propagation high-temperature synthesis,简称,SHS,),，,又称为燃烧合成,(,combustion synthesis,),技术，是利用反应物之间高的化学反应热的自加热和自传导作用来合成材料的一种技术，当反应物一旦被引燃，便会自动向尚未反应的区域传播，直至反应完全，能够用来制备无机化合物高温材料。,Company Logo,自蔓延高温合成(self propagat,4,直接合成法,Ti,2B TiB,2,Ta,C TaC,2B,N,2,2BN,Company Logo,直接合成法Compa,5,Mg,热,、,Al,热合成法,3Mg,Cr,2,O,3,B,2,O,3,2CrB,3MgO,G,Al+Fe,2,O,3,+B,2,O,3,FeB+FeAl+Al,2,O,3,G,Company Logo,Mg热、Al热合成法,6,反应原理图,Company Logo,反应原理图Compa,7,Morzhanov J.Ma t e r.C h e m.,2 0 0 4,1 4,1 7 7 9,Company Logo,Morzhanov J.Ma t e r.C h e,8,SHS,参数,Company Logo,SHS参数Compa,9,混粉,压实,装入,点火,反应,合成步骤,Macedo.Journal of the European Ceramic Society 24(2004)25672574,SHS,合成,B,4,Ti,3,O,12,Company Logo,混粉压实装入点火反应合成步骤Macedo.Journal,10,合成设备,Company Logo,合成设备Compan,11,SrFe,12,O,19,Maxim.J.Ma t e r.,1998,8,573,Company Logo,SrFe12O19Maxim.J.Ma t e r.,12,LaBO,3,Maxim.J.Ma t e r.C h e m.,2 0 0 4,1 4,1 3 7 7,Company Logo,LaBO3Maxim.J.Ma t e r.C h,13,C.L.Yeh.Journal of Alloys and Compounds 402(2005)118123,Nb,5,Si,3,/Nb,Company Logo,C.L.Yeh.Journal of Alloys and,14,成本低廉、时间短,两种制备方法的价格比在,0.20.3,之间！,SHS,所需时间为,5min+2h,固相反应所需时间为,10h,！,Company Logo,成本低廉、时间短Co,15,结果,SEM micrographs of Bi,4,Ti,3,O,12,powders:(a)produced by SHS;(b)produced by solid-state reaction.,Company Logo,结果SEM micrographs of Bi4Ti3O12,16,SEM micrographs of Bi,4,Ti,3,O,12,powders:(a)produced by SHS;(b)produced by solid-state reaction.,Company Logo,SEM micrographs of Bi4Ti3O12 p,17,应用前景,SHS,直接制备粉体,SHS,结合强化密实化技术,SHS,冶金和焊接,气相传质,SHS,涂层,Company Logo,应用前景Compan,18,改进方向,缺点：反应机理有待研究,Company Logo,改进方向Compan,19,参考文献,Chung et al,Advanced Materials 3(2002)129135,SHS:Concepts of Current Research and Development,A.G.Merzhanov,ed.,Territoriya,Chernogolovka,2003,p.368(in Russian).,A.G.Merzhanov and A.S.Rogachev,Russ.J.Phys.Chem.,2000,74(1),S20.,M.Ode,Scripta Materialia 52(2005)10571062,Levashov,，,Advanced Materials 4(2003)221228,Suzuki A,Wu F,Murakami H,Imai H.Advanced Materials 5(2004)555.,W.H.Chen,Journal of Alloys and Compounds 402(2005)118123,Company Logo,参考文献Chung et al,Advanced Mate,20,Thank You!,Thank You!,