简介：ThepolycrystallinesamplesofLa2/3Ca1/3MnO3werepreparedbyaconventionalsolidstatereactionmethod.Themagnetizations(ZFC,FCandinitialmagnetization)ofthepolycrystallineLa2/3Ca1/3MnO3weremeasuredwithsuperconductingquantuminterferencedevicemagnetometer.Thescalingtheorywasemployedtostudythechangesofcriticalbehaviorarisingfromtheappliedexternalfield.Thecriticalparameterβdecreaseswithincreasingtheexternalmagneticfieldresultsinanincreaseinthemagnitudeofferromagneticordering.

简介：Thecomplexofneodymiumchloridelowerhydratewithdiethylammoniumdiethyldithiocarbamate(D-DDC)wassynthesizedconvenientlyinabsolutealcoholanddryN2atmosphere.ThetitlecomplexwasidentifiedasEt2NH2[Nd(S2CNEt2)4]bychemicalandelementalanalysesandthebondingcharacteristicsofwhichwascharacterizedbyIR.TheenthalpiesofsolutionofneodymiumchloridehydrateandD-DDCinabsolutealcoholat298.15Kandtheenthalpieschangeofliquid-phasereactionofformationforEt2NH2[Nd(S2CNEt2)4]atdifferenttemperaturesweredeterminedbymicrocalorimetry.Onthebasisofexperimentalandcalculatedresults,threethermodynamicparameters(theactivationenthalpy,theactivationentropyandtheactivationfreeenergy),therateconstantandthreekineticparameters(theapparentactivationenergy,thepre-exponentialconstantandthereactionorder)ofliquid-phasereactionofformationwereobtained.Theenthalpychangeofthesolid-phasetitlereactionat298.15Kwascalculatedbyathermochemicalcycle.

简介：Magnetizationanddemagnetizationcurvesandhysteresisloopsapplieddifferentmagnetizing.fieldsinsinteredNd-Fe-BandNd-Dy-Fe-Bmagnetsfromthermallydemagnetizedanddcfield-demagnetizedstateswereinvestigatedattemperaturesofupto150℃.Thefirst-quadrantremagnetizationcurvesandthecurvesofcoerciveforces_MH_CversusrernagnetizingfietdsH_mfromdcfield-demagnetizedstateatroomtemperatureshowasteparoundmagnetizingfieldasabsolutevalueofthemaximumintrinsiccoercivity.Thestepsof_MH_C-H_mcurvesshiftedtolowerremagnetizingfieldsandtheshapesofmagnetizationcurveschangedfromsteptypetoprecipitoustypewhentemperaturewentupto100～150℃orafterthespecimenwasthermallydemagnetizedatatemperaturehigherthantheCurietemperature.Thesteepriseofkneecoereivitywithincreasingmagnetizingfieldisbehindthatof_MH_C.NotethatthemagnetichardeninginsinteredNd-Fe-Bmagnetsiscontrolledbypinningofdomainwalls.

简介：Anewkindofrareearthmaterialwithhighefficientlong-persistentphosphors,suchasSrAl2O4:Eu,Dy,hasbeendevelopedinrecentyears.ThePMMAwithlong-persistentphosphorsistypicaloneofapplicationsforthephosphors.Inthiswork,wetrytoprobeintotheaffectionofthemanufactureprocessonthePMMAwithlong-persistentphosphors,toanalyzeitsperformance,anditsluminescencebehavior,especiallytostudytheself-excitationofthePMMAwithlong-persistentphosphors.

简介：Closed-celltypebarrierribssuchasmeander,honeycomb,SDR,andwaffletypeswereproducedusingcapillarymoldingprocess.SinteringoftheribsrevealedthattheribswithasymmetricgeometrysuchasmeanderandSDRtypebecamedistortedseverelybythesinteringprocess,buttheribswithsymmetricgeometrysuchashoneycombandwaffletypemaintainedtheirgreenstatemorphology.Aftersintering,theribswerecoatedwithgreenphosphorusingosmosiscoatingprocessanditsluminancecharacteristicswereevaluated.Theresultsindicatedthattheluminanceanditsefficiencyisimprovedbyusingclosed-celltyperibswiththenewphosphorformingtechnology.

简介：AnenhancedadsorptionanddesorptionprocedureofNd(III)ontoD113-IIIresinwerepreparedwithvariouschemicalmethods.BatchstudieswerecarriedoutwithvariouspH,contacttime,temperatureandinitialconcentrations,andthencolumnstudieswereconducted.TheresultsshowedthattheoptimaladsorptionconditionwasatpHvalueof6.90.Theprocesswasfastinitiallyandarrivedequilibriumwithin60h.TheresinexhibitedahighNd(III)uptakeas232.56mg/gat298K.Theadsorptiondatafittedwellwithpseudo-second-orderkineticmodel.Thermodynamicparameterswerestudied,whichindicatedthattheadsorptionprocesswasspontaneousandendothermic.Thomasmodelwasdelineatedheretopredictthebreakthroughcurvesbasedontheexperimentalcolumnstudydata.Intheelutiontest,1mol/LHClsolutioncouldachieveasatisfactoryelutionrate,whichindicatedthatD113-IIIresincouldberegeneratedandreused.Finally,theIRspectroscopictechniquewasundertaken,andanoveladsorptionmechanismwasproposed.

简介：Lanthanumchlorideα-D-ribopyranosepentahydratecomplexwaspreparedandspeculateditsstructurefromthesimilarIRspectraofcorrespondingpraseodymiumandneodymium-D-ribosecomplexes,whichrevealthecoordinationbehaviorofD-ribosetolanthanideionsandgiveusamodeloftheinteractionsbetweenmetalionsandcarbohydrates.

简介：Inaflowinjectionseparationandpreconcentrationsystemincorporatingamicrocolumn,theadsorptionbehavior(effectofpH,kineticadsorptioncapacity)ofmetalionsCu^2+,Cr^3+,Mn^2+,Ni^2+,La^3+,Eu^3+,Ga^3+,Mo(Ⅵ)andW(Ⅵ)onTiO2owderwithdifferentcrystalstructureandparticlediameterwasstudiedandcompared.Inaddition,theechanismoftheadsorptionofmetalionsonTiO2owderwasexplored.TheresultsshowthatcrystaltructureandparticlediameteroftheTi02powderwillefinitelyaffecttheadsorptioncapacityofmetalsont.

简介：ＥｆｅｃｔｏｆＲａｒｅＥａｒｔｈｓｏｎＴｅｎｓｉｌｅＢｅｈａｖｉｏｒｏｆＨｏｔＲｏｌｅｒＳｔｅｌ６０ＣｒＭｎＭｏａｎｄＥｓｔｉｍａｔｉｏｎｏｆＲｏｌ′ｓＦａｔｉｇｕｅＬｉｆｅＹａｎｇＱｉｎｇｘｉａｎｇ（杨庆祥），ＺｈｕＧｕａｎｇｒｏｎｇ（朱广荣），...

简介：ThemorphologyandcorrosionbehaviorofNi/Al2O3compositecoatingspreparedusingdouble-pulsedelectrodepositingtechniqueafteroxidizedunder800℃NaCldepositinairenvironmentwereanalyzedbyscanningelectricalmicroscope(SEM),X-raydiffraction(XRD)andenergydispersivespectrum(EDS).TheresultsshowedthatthecorrosionofallcompositecoatingswasacceleratedunderNaCldeposits,andthecorrosionproductswereratherporouswithpooradherencetothematrix.Al2O3particlesinthecoatingscanrefinethegrainsizeandimprovethehightemperaturecorrosionresistanceofthecoatings.Withinthetestscope,themoreAl2O3particlesinthecoatings,thelowercorrosionratescouldbeobtained,andthecorrosionmechanismwasalsodiscussed.

简介：试图为高温度的熔融的盐反应堆的安装和电极的建设开发材料，在750和950湩爠晥湩浥湥?瑳敲杮桴湥湩?猠汯摩猠汯瑵潩?瑳敲杮桴湥湩?眠牯?慨摲湥湩?愠摮瀠敲楣楰慴楴湯猠牴湥瑧敨楮杮的Ni-11Fe-10Cu的高温度的氧化行为上的艾尔和Y的效果

简介：TheLa-CosubstitutedSr_（1–x）La_xFe_（12–x）Co_xO_（19）（x=0–0.5）ferriteswithappropriateBi_2O_3additivewerepreparedbyconventionalsinteringmethodandmicrowavesinteringmethodatlowsinteringtemperaturescompatiblewithLTCC（lowtemperatureco-firedceramics）systems,andtheirsinteringbehaviorwaschieflyinvestigated,includingthecrystalstructure,saturationmagnetizationMs,magneticanisotropyfieldHa,intrinsiccoercivityHci,andCurietemperatureTC.ExperimentresultsclearlyshowedthatthepureM-typecrystalphasewassuccessfullyobtainedwhentheLa-Cosubstitutionamountxdidnotexceed0.3.However,thesingleM-typephasestructuretransformedtomultiphasestructurewithfurtherincreasedx,wheretheM-typephasecoexistedwiththenon-magneticphasesuchasα-Fe_2O_3phase,La_2O_3phase,andLaCoO_3phase.AppropriateLa-CosubstitutionimprovedtheMs（〉62emu/g）,Ha（〉1400kA/m）,andHci（〉320kA/m）fortheferriteswithxvaryingfrom0.1to0.3,buttheTCdecreasedwithincreasingsubstitutionamount.Moreover,themicrowavesinteredferritescouldprovidelargerHciandsimilarMscomparedwiththeconventionalsinteredferrites.

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简介：NominalcompositionofCa1-xZnxTiO3:0.002Pr3+(x=0.000～0.200)phosphorswerepreparedbyconventionalsolidreactionroute.XRDandPLmeasurementswereusedtoinvestigatethesolid-solutionstructureandluminescencepropertiesofZn-dopedCa1-xZnxTiO3:0.002Pr3+phosphors.Theeffectofsolid-solutionstructureformedbysubstitutionbetweenCa2+andZn2+ionsontheluminescentpropertieswasanalyzed.Theresultsrevealthat,withtheincreaseofZnsubstitutioncontentbelow0.010,latticeparametersandtheintensityofexcitationpeakatboth260and330nmaswellasthecorresponding610nmemissionintensityaremonotonouslydecreasedquicklyinasimilartendency.Also,theevolutionofluminescenceintensityandcrystalcellparametersagainstZndopingconcentrationareingoodagreement.AboveresultsarecloselyrelatedwiththestructurechangewithinCa1-xZnxTiO3:0.002Pr3+solid-solutionphaseformedbytheZnionssubstitutionfortheCasites.Presentstudyrevealsthatthesolid-solutionstructureformedbysubstitutionbetweenCa2+andZn2+ionshassignificanteffectontheluminescencepropertiesofsinglephaseCa1-xZnxTiO3:0.002Pr3+phosphors.