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1、中南大學(xué)碩士學(xué)位論文配位沉淀-熱分解法制備特種多孔銅粉姓名：樊友奇申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：有色金屬冶金指導(dǎo)教師：張傳福20060101ABSTRACTSuperfinecopperpowder，whichhasexcellentphysicalandchemicalproperties，hasbeenusedwidelyaspowdermetallurgymaterials，catalysts，anti—frictionmaterials，conductingcoatsandelectromagneticshieldingmate
2、rials．Inthisthesis，advantagesanddisadvantagesofinternalandforeignpreparationtechnologiesofsuperfinecopperpowderarecommented．Accordingtothedefectsofthem，anewprocesscalledcoordinationprecipitation-thermaldecompositionisadoptedtopreparespecialporouscopperpowder．Precursor
3、andcopperpowderarecharacterizedbyX-RayDiffraction，ScanningElectronicMicroscope，InfraredAbsorptionSpectroscopy，ThermogravimetricAnalysisandDifferentialThermalAnalysis，GasAdsorptionMethodandChemicalAnalysis．Intheprocessofcoordinationprecipitation，Accordingtothelawofcons
4、ervationofmassandlawofsimultaneousequilibrium，themathematicsmodelofCu+-NH3-N時(shí)一C2042--n20thermodynamicequilibriumsystemisestablished，andthecorrespondinglogarithmsconcentrationofmetalions—pHvaluediagramsarealsodrawn．Basedonthesediagrams，therangeofpHvalueinthecoordinatio
5、nprecipitationprocessisdetermined．Withtheuseofsolublecoppersalt，ammoniumoxalateandammoniaasrawmaterials，theeffectsofanions，excesscoefficientofC204厶，chargingmode，reactiontemperature，originalCuz十concentration，pHvalue，additionagentsanddryingmodeontheparticlesizes，morphol
6、ogiesofprecursorpowdersanddepositionrateofcu十a(chǎn)restudiedsystemmaticallly．Theresultsshowthatonoptimumcondition：reversechargingmode，excesscoefficientofC204厶1．1，temperature50．-60。C，[Cu2+]O．4mol／L，precursorpowderswithvariousmorphologiesareproducedindividually，suchasCUC204’
7、H20platepowderwhenpH<5．5，aggregationofnoodlespowderwhosephaseiscomplexcoppersaltscontainingNH3whenpHvalueisbetween6．4--6．8androdlikepowderwhenadditionagentBisused．Inthermaldecompositionprocess，theeffectsoftemperature，timeoftemperatureriseandheatretaining，gasatmosphere
8、onparticlesizes，morphologiesandspecificsurfaceareaofcopperpowder．Atlast，thestructuresandsizedistributionsofporesofcopperpowd
