简介:做Si的Ge(2)sb(2)Te(5)电影被dc劈啪作响magnetronco与Ge2Sb2Te5和Si目标准备了。在在两结晶化温度和阶段转变温度fromface-centred-cubic(fcc)的增加的Te(5)电影结果分阶段执行到的Ge(2)sb(2)的Si的增加六角形(十六进制)阶段。Ge2Sb2Te5电影的抵抗力显示出重要增加,Si做。当在这部电影做Si的11.8at.%时,在退火的460度C以后的抵抗力与undopedGe2Sb2Te5电影相比从64~99终止从1~11m终止(.)厘米和动态抵抗增加增加。这对写阶段变化随机存取记忆的当前的减小很有用。
简介:ThecorrelationbetweenphasestructuresandsurfaceacidityofAl2O3supportscalcinedatdifferenttemperaturesandthecatalyticperformanceofNi/Al2O3catalystsintheproductionofsyntheticnaturalgas(SNG)viaCOmethanationwassystematicallyinvestigated.Aseriesof10wt%NiO/Al2O3catalystswerepreparedbytheconventionalimpregnationmethod,andthephasestructuresandsurfaceacidityofAl2O3supportswereadjustedbycalciningthecommercialγ-Al2O3atdifferenttemperatures(600–1200C).COmethanationreactionwascarriedoutinthetemperaturerangeof300–600Catdifferentweighthourlyspacevelocities(WHSV=30000and120000mL·g-1h-1)andpressures(0.1and3.0MPa).ItwasfoundthathighcalcinationtemperaturenotonlyledtothegrowthinNiparticlesize,butalsoweakenedtheinteractionbetweenNinanoparticlesandAl2O3supportsduetotherapiddecreaseofthespecificsurfaceareaandacidityofAl2O3supports.Interestingly,NicatalystssupportedonAl2O3calcinedat1200C(Ni/Al2O3-1200)exhibitedthebestcatalyticactivityforCOmethanationunderdifferentreactionconditions.LifetimereactiontestsalsoindicatedthatNi/Al2O3-1200wasthemostactiveandstablecatalystcomparedwiththeotherthreecatalysts,whosesupportswerecalcinedatlowertemperatures(600,800and1000C).ThesefindingswouldthereforebehelpfultodevelopNi/Al2O3methanationcatalystforSNGproduction.
简介:The2Dplanegasflowunderheating(withnonentityboundarycondition)hasbeendiscussedbytheanalyticalapproachinthispaper.Theapproximateanalyticalsolutionshavebeenobtainedfortheflowpassingvariouskindsofheatsources.Solutionsdemonstratethethermaldisplacementphenomenaarestronglydependontheheatingintensity.
简介:DigitaldecayspectroscopyofactinideisotopesatthegasfilledseparatorSHANSAlloverthechartofnuclides,theregiontothe“north-east”of208Pb,withZ≥84andN=128~130,hoststheshortest-livedαradioactivities,withhalf-livesintherangeofnanosecondstomicroseconds.Synthesisanddetectionofneutron-deficientisotopesabovethoriuminthisregionarechallengingduetotheirlowproductioncrosssectionsandshorthalf-lives.
简介:Depositionoftwo-dimensional(2D)MoS2materialsonthetaperedfiberallowsvariousphotonicapplicationsincludingsaturableabsorbersandfour-wavemixing.Ethanolcatalyticdeposition(ECD)ofMoS2ontheopticaltaperedfiberwasproposedanddemonstratedinthiswork.Differentfromtheconventionalopticaldrivendepositionusingwaterororganicsolvent,theECDmethodutilizedthehighvolatilityoftheethanolsolvent,whichsignificantlyincreasedthemovementspeedoftheMoS2nanosheetsandthusboostedthedepositionrateandreducedtheminimumpowerthresholdtodrivethedeposition.WebelievetheECDmethodshouldbeabletobeappliedtoothersimilar2Dmaterialssuchasothertypesoftransitionmetalchalcogenides.
简介:Theneutralgaspressurenearplasmaordivertorplatesisveryimportantfortheplasma-wallinteraction,whichdeterminetheoperationmodeofdivertomandconfinementperformancesofplasmaintokamaks.Thecommercialionizationgaugedoesnotworkinstrongmagneticfieldandnoisyenviromentencounteredintokamaks.Themeasuringerromofpressurecommercialionizationareverylargebythegaugemountedonthepumpingsystemorthroughalongpipetothevacuumvessel.Anewionizationgauge,
简介:HL-2Aisatokamakwithcloseddivertor.Ithadbeenbuiltattheendof2002andbegantodischargefromthenon.TofurtherstudyplasmadischargesinHL-2A,afeedbackcontrolsystem(FBCS)forplasmapositionbadbeendevelopedin2003.
简介:Impurity,whichisinducedbytheinteractionbetweenplasmaandthefirstwallsuchaslimiter,isoneofthekeyissuesimpactedthequalityoftokamakplasma.Itisalsothesourceoftheradiationandcoldelectronintokamak,andcanhaveasignificantinfluenceonthebalanceofplasmaenergyandparticleaswellastheprofilesofdensity,temperatureandcurrent.Thesteadystateoperationandtransportfeatureoftokamakplasmaareaffectedbyimpuritytoo.