納米氧化鋅二步法制備技術(shù)研究.pdf

1、東北大學碩士學位論文納米氧化鋅二步法制備技術(shù)研究姓名：劉志偉申請學位級別：碩士專業(yè)：礦物加工工程指導教師：印萬忠20041201東北大學碩士學位論文AbstractStudyonPreparationTechnologyforNanoZnObyTwoStepMethodAbstractNanoZnOasanewkindoffunctionalmaterialhasspecialpropertiesandapplicationinthef

2、ieldofmagnetismsensitivityantibiosisandantipoisoningultravioletrayshieldetcwhichthecommonZnOhasnot.NowtherearemanypreparationmethodsfornanoZnOasconcerningpreparationtechnologythereareonestepmethodandtwostepmethod.Conside

3、ringindustrializationnowtherearemanystudiesontwostepmethodprecipitationandthermaldecomposition.Amongtwostepmethoddiferentprecursorswithdiferentpropertiescanbemadebydifferentrawmaterials.Thekindspropertiesthermaldecomposi

4、tionsurroundingofprecursorsinfluencethepropertiesofnanoZnOgreatly.Anditdeterminestheinvestmentandthecostofproduct.InthispapertwostepmethodischosentosynthesizenanoZnOindirectlyusingZnC12、(NH4)2CO3andZnC12(NH4)2C204asrawma

5、terialsrespectively.TwoprecursorsZn5(C03)2(OH)6andZnC2042H20aremade.ResorttoXRDTEMDTAetctheprecursorsandnanoZnOaretestedinordertodeterminewhatitisanditssizeandpattern.Theresultofthetestshowsthatthefactorswhichafectthepre

6、parationofnanoZnObytwostepmethodcanbeconsideredintwoaspects.Firstlythemainfactorsdominatingtheprecipitationreactionaretemperaturetimereactantconcentrationanditsratiotheycantakeefectonthepropertiesofprecursorsdirectlyandt

7、hepropertiesisimportanttothethermaldecompositionreaction.SecondlythefactorsthatafectthethermaldecompositionreactionarereactiontemperatureandtimeandtheyafectthesynthesisofnanoZnOdirectly.Theresultsshowthattheefectoftherma

8、ldecompositionreactioninthesecondstepismoresignificantthanthatofprecipitationreactioninthefirststep.Using(NH4)2CO3andZnC12asrawmaterialsthebestprecipitationreactionconditionsare:time30mintemperature600CconcentrationofZn2