稀土堿式碳酸鹽的合成及性能研究.pdf

1、中國科學(xué)技術(shù)大學(xué)碩士學(xué)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(xué)位級別：碩士專業(yè)：應(yīng)用化學(xué)指導(dǎo)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