ZnO對ZnS-Cu發(fā)光粉液相沉淀法表面包覆的研究.pdf

1、哈爾濱工業(yè)大學(xué)碩士學(xué)位論文ZnO對ZnS:Cu發(fā)光粉液相沉淀法表面包覆的研究姓名：董春妮申請學(xué)位級別：碩士專業(yè)：化學(xué)工藝指導(dǎo)教師：陳振寧20050601墮竺堡三些查蘭三蘭堡圭蘭堡鎏蘭AbstractZnS：CuiSatypeoffamiliaralternatecurrentpowderelectroluminescenlphosphorItiswidelyuseinlightanddisplayWhenitisoperatedinth

2、edankcircumstanceZnStendtobehydrolyzedTheliretimeiSdecreasedduetothedestructionofluminescentconfigurationInordertoprolonglhelifetimeandimprovethestabilityofthephosphor，liquidprecipitatemethodwasadoptedtoformcoatingofZnOf

3、ilmonthesurfaceofZnS：CuphosphorQualificationsofprecipitatemethodtothephosphorsurfacecoatinghadbeenstudiedZnOcoatingsonthesurfaceofphosphorparticleswereidentifiedandcharacterizedbymeansofSEM，EDS，XRDmeasurements；11heconstr

4、uctionofcoatingsandthemodificationeffectwerecharacterizedbyIR；ThespectralcharacteristicsofcoatedphosphorweremeasuredbyLuminescencemeasurementsTilecontentandtheconstructionofZnOcoatingwereinvestigatedAndthecoatingmechanis

5、mwasalsoprimarydiscussedinthispaper7lherearetwofeedinmodeinthisexperiment：Oneisfeedthephosphorsuspensionintheselfpreparedcoatingsolution；theotherisfeedtheselfpreparedcoatingsolutioninphosphorsuspensionTheresultsshowthatt

6、heformerismorefavorabletocoatSinglefactorssuchasreactiontimeSurfactant，concentration，surfacepretreatmentareexperimentedandanalyzedthenoptimizedinanintegrateviewThenmorefavorablequalificationsoflbrinerfeed—inwayareeducedI

7、tiSreact15hours。addedinOPassurlhctant。themasscontentofphosphoriS10％ureais15mol／LandZn(N03)2isO45mol／I，andthecoatingmaterialisoccupied25％inthewholereactants，thefeedintimeisabout30minandhaveonceH202pretreatmentTheresultsof

8、SEMEDS，XRDandlRmeasurementsshowthatphosphorparticlesareessentiallycompletelycoatedwithZnOSEMphotographindicatethattherearehomogeneouscoatingsappearedandtheparticlesareevenEDS，XRDandIRSpectraconfirmthatthecoatingsareZnOcr