液相还原法制备超细球形镍粉的研究(英文)-豆柴文库

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液相还原法制备超细球形镍粉的研究(英文)
ResearchonthePreparationofUltrafineSphericalNickelPowderbyLiquid-phaseReductionMethod
Abstract:
Inrecentyears,thedemandforultrafinesphericalnickelpowderhasbeenincreasingduetoitsuniquepropertiesandnumerousapplications.Theliquid-phasereductionmethodhasbeenwidelystudiedasaneffectiveapproachtoprepareultrafinenickelpowderwithasphericalmorphology.Thispaperprovidesacomprehensivereviewontheresearchprogressoftheliquid-phasereductionmethodforthesynthesisofultrafinesphericalnickelpowder.
1.Introduction
Ultrafinesphericalnickelpowderpossessesexcellentcatalytic,magnetic,andthermalproperties,makingithighlydesirableforapplicationsinvariousindustries.Thetraditionalmethodsfornickelpowderpreparation,suchasgas-phasereductionandelectrodeposition,exhibitlimitationsintermsofparticlesizecontrolandproductionefficiency.Theliquid-phasereductionmethod,ontheotherhand,offersapromisingsolutiontogenerateultrafinenickelpowderwithasphericalshapeandnarrowsizedistribution.
2.Liquid-phaseReductionMethod
Theliquid-phasereductionmethodinvolvesthereductionofnickelionsinaliquidmediumtoformnickelparticles.Typically,areducingagent,suchashydrazine,sodiumborohydride,orhydrogen,isaddedtothenickelsaltsolutiontoinitiatethereductionreaction.Thereactionparameters,includingtemperature,pH,concentration,andreactiontime,haveasignificantinfluenceonthemorphologyandparticlesizeoftheresultingnickelpowder.
3.MechanismofUltrafineSphericalNickelPowderFormation
Theformationmechanismofultrafinesphericalnickelpowderthroughliquid-phasereductioninvolvesnucleation,growth,andmorphologyevolutionstages.Thereductionreactioninitiatesthenucleationofnickelparticles,whichthengrowinsizethroughcoalescenceorOstwaldripeningprocesses.Thecontrolofreactionparameters,particularlythesurfactantorstabilizeraddition,canpromotetheformationofultrafinesphericalnickelpowderbypreventingparticleaggregationandmaintainingasphericalmorphology.
4.Catalyst-assistedLiquid-phaseReductionMethod
Tofurtherenhancetheperformanceofultrafinespherica