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1、Availableonlineatwww.sciencedirect.comTransaefionsof嗨:ScienceDirectNonferrousMetalsSocietyofChinaPressTrans.NonferrousMet.Soc.China24(2014)1452—1457WWW.mmSC.CnAnovelwet—chemicalmethodforpreparationofsilverflakesAi-xiaZHAI,Xiong—hniCAIz,BinDU1.SchoolofChemicalandEnvironmentalEngineering,Wuh
2、anPolytechnicUniversity,Wuhan430023,China;2.SchoolofBiologicandPharmaceuticalEngineering,WuhanPolytechnicUniversity,Wuhan430023,China;3.ChinaNationalApparatusResearchInstitute,Guangzhou510300,ChinaReceived27May2013;accepted29September2013Abstract:Anove1wet.chemicalme~odforthepreparationofs
3、ilverflakeswasstudied.Thewell—definedparticleswerepreparedbydirectlyaddingFeSO4solutionintoAgNOsolutioncontainingcitricacidatanagitationspeedofl50r/rainatroomtemperature.Theproductswerecharacterizedbyscanningelectronmicroscopy(SEM)andX—raydifraction(XRD).Theresultsshowthatparticlesareirreg
4、ularthinsilverflakes.Andthesizesofthemrangefrom2to10山n.Itisfoundthatcitricacidplaysanimportantroleint11eformationofsliverflakes.Thereisanoptimumamountofcitricacidforthepreparationofsilverflakesbythismethod.Itisalsofoundthathighreductionrateisfavorablefortheformationofsilverflakes.Keywords:
5、silverflake;wet.chemicalmethod;FeSo4·7H2O;citricacidpresenceofammonia.ThelateraldimensionofthesilverlIntrOductjOnsheetswasupto15gin.AndLIANGeta1『21]synthesizedsilverflakesbyreducingthetollenreagentTheultrafinemetallicpowdersareusedextensivelywithhydrogenperoxideunderthecatalysisofin1it,ele
6、ctricity,magnetism,heatandcatalysisareas.chloroplatinicacidinethyleneglyco1.ThesizeoftheAndthesilverpowdershadattractedconsiderablesilverflakescouldreach30gm.Obviously,themethodsattentionduringthepastfewyearsfortheirmanymentionedaboveforthepreparationofmicro.sizedadvantages.suchashighelect
7、ricalandthermalsilverflakesneedtobecarriedoutinathermalprocessconductivity,highinoxidizability,excellentsolderabilityorneedseedstocatalyzeandpromotetheanisotropicandreasonableprice.Amongmanypreparationmethodsgrowthofsilvernucleus.Inourpreviouswork【221,theofsil