儲氫材料氦屏蔽效應(yīng)的機(jī)理研究.pdf

1、復(fù)旦大學(xué)碩士學(xué)位論文儲氫材料氦屏蔽效應(yīng)的機(jī)理研究姓名：張海濤申請學(xué)位級別：碩士專業(yè)：物理電子學(xué)與光電子學(xué)指導(dǎo)教師：張強(qiáng)基周德惠2000.5.1InvestigationoftheMechanismofHeliumBlanketingEffectofHydrogenStorageMaterialsAbstractHydrogen(anditsisotopes)hasacloserelationshipwiththeenergySupply

2、TosomedegreetostorehydrogenmeanstostoretheenergyThewaysofhydrogenstoragewilleffectthetransportationandtheensuingreleasingofhydrogendirectly3Heis’presentduetothedecayoftritium(T)duringthestoringandprocessingoftritiumofhyd

3、rogenstoragematerials，suchasLaNi5，PdetcThepresenceofhelium，themaincomponentoftheinertgasesinthestoragetankofpipe、willretardhydrogenuptakeasaccumulatingaroundthestoragematerialsandformingablankettothetransportationofhydro

4、genThatiscalledHeliumBlanketingEffect(HBE)FollowinginvestigationshavebeenperformedaroundthemechanismofHBE1ThemeasurementsofsurfaceelectronicspectrabyXPSandAESindicatethateventheseinertgaseswithseveralkeVkineticenergyhave

5、notdetectableeffectsonthesurfaceelectronicstatesofthestoragematerialsHBEisnotaneffectduetothechangeofthehydrogenuptakepropertyonthesurfaceofthematerials2Bytheexperimentsofhydrogenabsorption，the”bulkflow’’modelanditspredi

6、ctingformulaoftheblanketingpressureproposedby0rtmanwasverifiedAtwo—stepmodelbulkflowanddiffusionflowofhydrogenabsorptionhasbeenproposedtopicturethewholeprocessTheexperimentdatacanbefittedandexplainedbythismodelsuccessful

7、ly3Accordingtokinetictheoryofgases，definitionsandanalyticdescriptionsweregiventothegasdiffusion，bulkflowandhydrogenuptakeprocessesBasedonthatacomputersimulationwasperformedwhichgaveadetailanalysisofmicroprocessanddelinea

8、tedthewholekinematicprocessclearlyItissuggestedthatHBEisadiffusion—limitedmasstransferprocess，theexistenceofpipelimitationisthemainfactorleadingtotheappearanceofHBETherevelationofthismechanismprovideswaystoavoidordiminis