稀土堿式碳酸鹽的合成及性能研究.pdf

1、中國科學技術大學碩士學位論文稀土堿式碳酸鹽的合成及性能研究姓名：徐振宇申請學位級別：碩士專業(yè)：應用化學指導教師：張悠金20100401ABSTRACTABSTRACTDuetotheuniquephysicalandchemicalpropertiesofrareearthelements，rareearthcompoundshavebeenwidelyappliedinmanyfields，suchasoptics，informati

2、on，permanentmagnet，superconducting，energycatalysis，medicine，biologyandotherfieldsPreparingdifferentrareearthcompoundshavecausedgreatinterestforscientificresearchersInthisdissertation，severallanthanidehydroxycarbonatshave

3、beensynthesizedviahydrothermalmethodwithoutanysurfaceactiveagentandcomplexagentTheirformationmechanismsandluminescentpropertieswerestudiedDetailresultsalesummarizedasfollows：1TheNdOHC03dodecahedronmicrocrystalshavebeensy

4、nthesizedviaahydrothermalmethodbyusingneodymiumnitrateandureaasthereactantsThephase，morphologyandcompositionoftheproductwereanalyzedbyXraydiffractionscanningelectronmicroscopytransmissionelectronmicroscopyXrayphotoelectr

5、onspectroscopyandinfraredspectroscopyExperimentalparameters，suchasthereactingtemperature，thereactingtime，andthemolarratioofthestartingreagentswereexaminedTheresultsshowthatthereactingtemperatureisthekeyfactortoprepareNdO

6、HC03dodecahedronmicrocrystalsThepossiblegrowthprocessofNdOHC03dodecahedralmicrocrystalswasdiscussed2EuC030Hmicrosphereshavebeensuccessfullypreparedviaafacilehydrothermalapproachbyusingureaastheprecipitantwithouttheassist

7、anceofanysurfactantsortemplatesTheEu203microsphereshavebeenpreparedbythermalconversionofEuC030HmicrospheresTheaSobtainedproductswerecharacterizedbyXraydiffraction，scanningelectronmicroscopy，X—rayphotoelectronspectroscopy

8、，F(xiàn)ouriertransforminfraredspectroscopy，thermogravime州ifferentialthermalanalysisSeveralexperimentalparameterswereexamined，such嬲thereactiontemperature，thereactiontime，andthemolarratiosofthestartingreagentsTheresultsshowthat

9、thetemperatureexertsakeyinfluenceOiltheformationofEuC030HmicrospheresandthatthereactiontimeandmolarratiomainlyaffectthesurfacestructureofthemicrospheresMeanwhile，thephotoluminescencepropertiesofEuC030HandEu203microsphere