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1、Trans.NonferrousMet.Soc.China24(2014)1452?1457Anovelwet-chemicalmethodforpreparationofsilverflakes123Ai-xiaZHAI,Xiong-huiCAI,BinDU1.SchoolofChemicalandEnvironmentalEngineering,WuhanPolytechnicUniversity,Wuhan430023,China;2.SchoolofBiologicandPharmaceuticalEngineerin
2、g,WuhanPolytechnicUniversity,Wuhan430023,China;3.ChinaNationalApparatusResearchInstitute,Guangzhou510300,ChinaReceived27May2013;accepted29September2013Abstract:Anovelwet-chemicalmethodforthepreparationofsilverflakeswasstudied.Thewell-definedparticleswerepreparedbydi
3、rectlyaddingFeSO4solutionintoAgNO3solutioncontainingcitricacidatanagitationspeedof150r/minatroomtemperature.Theproductswerecharacterizedbyscanningelectronmicroscopy(SEM)andX-raydiffraction(XRD).Theresultsshowthatparticlesareirregularthinsilverflakes.Andthesizesofthe
4、mrangefrom2to10μm.Itisfoundthatcitricacidplaysanimportantroleintheformationofsliverflakes.Thereisanoptimumamountofcitricacidforthepreparationofsilverflakesbythismethod.Itisalsofoundthathighreductionrateisfavorablefortheformationofsilverflakes.Keywords:silverflake;we
5、t-chemicalmethod;FeSO4·7H2O;citricacidpresenceofammonia.Thelateraldimensionofthesilver1Introductionsheetswasupto15μm.AndLIANGetal[21]synthesizedsilverflakesbyreducingthetollenreagentTheultra?nemetallicpowdersareusedextensivelywithhydrogenperoxideunderthecatalysisofi
6、nlight,electricity,magnetism,heatandcatalysisareas.chloroplatinicacidinethyleneglycol.ThesizeoftheAndthesilverpowdershadattractedconsiderablesilverflakescouldreach30μm.Obviously,themethodsattentionduringthepastfewyearsfortheirmanymentionedaboveforthepreparationofmic
7、ro-sizedadvantages,suchashighelectricalandthermalsilverflakesneedtobecarriedoutinathermalprocessconductivity,highinoxidizability,excellentsolderabilityorneedseedstocatalyzeandpromotetheanisotropicandreasonableprice.Amongmanypreparationmethodsgrowthofsilvernucleus.In
8、ourpreviouswork[22],theofsilverparticles,thewet-chemicalmethodisoftenmicro-sizedhexagonalandtriangularsilverplateswerepreferredforitsadvan
