多元醇制备超细钴粉及表面改性

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1、兰州理工大学硕士学位论文多元醇制备超细钴粉及表面改性姓名：李军强申请学位级别：硕士专业：材料加工指导教师：王玉棉20050401AbstractIthadbeenbrieflysummarizedabouttheCOffeeptionandmicrocosmiccharactersandpreparingmethodsofultrafinepowder，atthesametime，ithadbeensummarizedthedevelopmentalsurveyandactuality,fimdamentalcharacters，applicationsandpreparingmeth

2、odsofultrafinecobaltpowderinthepaper,andtheprocesstechnologyofultrafinecobaltpowderwasthoughttobeoreofimportantstepsinthepreparmionandapplicationofhighpropertymaterials，limitationsexistedinthecurrentpreparingmethodsofultrafinecobaltpowderhadalsobeenpointedout，andnewtecbnicseswerebringforwardaimi

3、ngattheothermethods’problemsandtheresourceofcobaltexistedinthepreparingmethodsofcobaltpowder．Fromdifferentcomparisonofpreparationprocess，itcarlbedrew，ontheonehand，thatultrafinecobaltpowderismorepure，morethin，moresymmetricalandsphericalthanotherpreparationprocessbypolyolsreduction，onotherhand，the

4、reismorerawmaterialstobeused，moresimplepreparationtechnics，cobaltsizeandshapecanbecontrolledthanotherpreparationprocessbypolyolsreduction．Ifitisusedforindustrialproduction，therewillberesearchedandexploredintechnologyparametersandconditionofgranularitycontrollingWiththemethodofsolutionchemistry,i

5、thadbeenexplainedabouttheinfluenceofhydrolyzingconditionstothegranularityofcobalthydroxide．Usingthetheoryofredoxandcrystaldevelopment，theinfluenceoftheaddingquantityandtheaddingtimeofreagenttothecapabilityofcobaltpowder,anditreferablyexplainedtherelationshipsbetweentheratiosofdifferentrawmateria

6、lsandthesizeandshapeofultrafmecobaltpowder．Taking，cobaltnitrate，cobaltcarbonate，cobaltsulfate，threekindsofcobaltsaltsrespectivelyastherawmaterial，cobMthydroxidewaspreparedinthispaper．Thespherical，monodispersed，ultrafinecobaltpowderwithafacecenteredcubicstructureandasizelessthanIumweresynthesized

7、bythereductionoftetrahydratedinglycolor1，2-propanediol、Thesewerestudiedthattheprophasecobalthydroxidepreparedbydifferentcobaltsaltsaffectingfollowingreactionandthequantityofsodiumhydroxideandcobalthydroxideinunitvohtmeofglyc