简介：TheNaGd（WO_4）_2：Eu~（3＋）phosphorswerepreparedbythemicroemulsionmediatedhydrothermalmethod.ThemorphologyandsizeofthesamplescouldbedependentonthepHintheinitialsolution.Thesephosphorsobtainedhadastrongabsorptionat395nmmatchingwiththepopularemissionofnear-UVLEDchips,andcouldemitintenseredlightat616nm.Thesmallellipsoid-likeparticlesorshortrodswereprovidedwithlargeparametersofoscillatorstrength？_2andasymmetryratio.Comparedtotheellipsoid-likephosphors,therod-likephosphorstookonstrongeremission,longerlifetimeandlargerquantumefficiency.Thisworkdemonstratedthattheone-dimensionNaGd（WO_4）_2：Eu~（3＋）phosphorsmightbeamorefavorabledevicethanzero-dimensiononesforphotoluminescence.

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简介：DirectextractionofmetalsfromsolidswithcomplexingagentsinsupercriticalCO2(SC-CO2)hasrecentlyattractedinterestsinseparation,purification,recovery,andanalysisofmetals.Inthepresentstudy,thestatic/dynamicextractionofrareearthelements(Nd,Ce)fromtheiroxides(Nd2O3,CeO2)withorganophosphoruscomplexeswithHNO3andH2OinSC-CO2wasinvestigated.ThestaticextractionefficiencyofNdfromNd2O3withthetri-n-butylphosphate(TBP)-HNO3complexcouldreach95%underoptimizedexperiment...

简介：Glasseswiththecompositionof65GeO212Ga2O3-10BaO-8Li2O-5La2O3(molarratio)dopedwith1.526wt.%,3.006wt.%,5.836wt.%,11.028wt.%,and15.678wt.%Tm2O3,respectively,werefabricatedbyconventionalmeltingmethod.AccordingtotheabsorptionspectraandtheJudd-Ofelttheory,theJ-Ostrengthparameters(Ω2,Ω4,Ω6)werecalculated,withwhichtheradiativetransitionprobabilities,branchingratiosandradiativelifetimeswereobtained.Theinfraredemissionspectra(with808nmLDexcitation)at～1.47and～1.8μmofvariousconcentrationsofTm3+-dopedglasseswerestudied.Theemissionintensityat～1.8μmreachedtothemaximumwhentheTm2O3-dopingconcentrationwasneartobe～3.006wt.%(1.0mol.%),andthendecreasedasdopingconcentrationincreasedfurther.Themechanismofthefluorescenceintensitychangewasexplainedwiththecross-relaxationeffectandtheconcentrationquenchingeffectofTm3+.Meanwhile,accordingtoMcCumbertheory,theabsorptionandemissioncross-sectionscorrespondingtothe3F4→3H6transitionsofTm3+at1.8μmwasobtained.ForTm3+-dopedgermanateglasses,themaximumemissioncross-sectionreachedavaluehigherthanthatre-portedforfluorozircoaluminateglasses.Itisexpectedtobeafavorablecandidatehostfor～2.0μmmid-inflatedlaserbecausetheglassshowsfavorableopticalspectra.

简介：ＥｌｅｃｔｒｏｎＭｉｃｒｏｓｃｏｐｉｃＩｎ－ｓｉｔｕＯｂｓｅｒｖａｔｉｏｎｆｏｒＰｒｅｐａｒａｔｉｏｎｏｆＵｌｔｒａｆｉｎｅＬａ２Ｏ３ＮａｎｏｐｈａｓｅＰｏｗｄｅｒＧａｏＹｕｚｕｎ（高愈尊），ＬｉＹｏｎｇｈｏｎｇ（李永洪），ＺｈａｎｇＴａｉｓｏｎｇ...

简介：OpticalabsorptionandemissionintensitiesofNd3+ioninKLu(WO4)2crystalwereinvestigated.BasedontheJudd-Offelttheory,wecalculatedthefollowingspectralparameters:phenomenologicalintensityparametersΩ2=5.567×10–20,Ω4=3.597×10–20,andΩ6=3.800×10–20cm2.Theradiativelifetimeoflevels4F3/2was182.58μs.Thefluorescencebranchingratioforthetransition4F3/2→4I11/2was46.98%.Inaddition,theradiativetransitionprobabilitiesAJ,J’,oscillatorstrengthsPJ,J’andthevaluesofinte...

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简介：高度有效的Tb3+激活SrAl2O4黄磷被一个联合combustionsolid状态反应方法综合。SrAl2O4的先锋:Tb3+黄磷经由一个燃烧过程被准备，然后同样准备的粉末被加热在一减少在1250点的激活的碳周围??慥獲？

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

简介：Aseriesofnovelbluelong-lastingphosphorescencephosphorsSr6Al18Si2O37:Eu2+,RE3+(RE3+=Ho3+,Gd3+,Dy3+andPr3+)werepreparedbytheconventionalhigh-temperaturesolid-statereactioninareductiveatmosphere.TheirpropertiesweresystematicallyinvestigatedutilizingX-raydiffraction(XRD),photoluminescence,phosphorescenceandthermoluminescence(TL)spectra.ThephosphorsemittedbluelightthatwasrelatedtotheemissionofEu2+dueto5d-4ftransition.Brightbluelong-lastingphosphorescence(LLP)couldbeobservedaftertheexcitationsourcewasswitchedoff.Fortheoptimizedsample,thebluelong-lastingphosphorescencecouldlastfornearly4hinthelightperceptionofthedark-adaptedhumaneye(0.32mcd/m2).TheeffectsofRE3+ionsonphosphorescencepropertiesofthephosphorswerestudied,andtheresultsshowedthattheco-dopingofRE3+ionsgreatlyenhancedtheintensityofthepeakaround315Kwhichwasrelatedtothelonglastingphosphorescenceofthephosphorsatroomtemperatureandconsequentlyimprovedtheperformanceofthebluephosphorescencesuchasintensityandpersistenttime.

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简介：是的Gd2O3薄电影高--门电介质被磁控管在1.3Pa和不同温度的一个压力劈啪作响在Si(001)底层上直接扔。X光检查衍射结果揭示了那从450～570慮挠牥浡捩洠瑡牥慩獬?潈?牰獥楳杮眠獡甠敳?潴映'L楲慣整愠畬業慮洠瑡楲?潣灭獯瑩獥椠?楮牴杯湥愠浴獯桰牥?牰瑯'虡N湯?楍牣獯牴'壮肭?种的所有电影湡?敭档湡捩污瀠潲数瑲敩?景琠敨挠浯潰楳整?敷敲琠獥整???慷?湩楤慣整?桴瑡琠敨戠湥楤杮猠牴湥瑧?湡?牦捡畴敲琠畯桧敮獳漠?污浵湩?慭牴硩挠牥浡捩挠浯潰楳整?楳瑮牥摥愠?????P

简介：Awhitelong-lastingphosphorCa2MgSi2O7:Dy3+waspreparedbythesolid-statereaction.Astrongbandpeakedat260nmwasshownintheexcitationspectrumof578nmemission,whichmightbeattributedtotheoxygendeficiencyofthehost.Afterirradiatedwith254nmfor4min,thewhiteafterglowofthesamplecouldbeseenfor3h.Moreover,thedepthsandfrequencyfactorsoftrapcenterswerecal-culatedfromthethermo-luminescencecurveofthesample,whichindicatedthatthetrapcenterscorrespondingtothe414Kbandweremorehelpfultothelong-lastingphosphorescence.

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简介：针对莱钢型钢炼铁厂2号炉的影响炉况顺行和高炉燃料比等多个方面进行研究,通过“开发稳定焦炭干基入炉量控制技术”、“上部实现精准布料”、“酸性料及焦丁平铺技术”等创新技术的实施,最终实现延长高炉使用寿命和低燃料比冶炼的目的.

简介：AseriesofSm~(3+)dopedY_2MoO_6werepreparedthroughhightemperaturesolidstatereactiontechnique.Theirphasestructures,morphologiesandluminescencepropertieswereinvestigatedbyX-raydiffraction(XRD),scanningelectronmicroscopy(SEM)andphotoluminescencespectrometry.ThemostintenseabsorptionofY_2MoO_6hostoccurredat367nm.EnergytransferfromhostlatticetoSm~(3+)ionscouldbeobserved,andtheschematicdiagramofenergytransferwasconstructed.ThecriticalenergytransferdistanceandenergytransfermechanismbetweenSm~(3+)ionswerediscussedindetail.Consideringthehighcolorpurityandappropriateemissionintensity,Sm~(3+)dopedY_2MoO_6couldbeapromisingphosphorundernearultravioletlightexcitation.

简介：通过介绍以钛白副产硫酸亚铁、工业酸洗废液、平炉红尘等为原料制备软磁用α-Fe2O3的工艺,探讨了工艺方法、工艺参数及影响因素等.

简介：Thesolutionreactionmechanisms,composition,donoratoms,propertiesofcoordinatelinkandstabilityofthecomplexesonthesystemsofadrenalinewithNa3+,Gd3+andTm3+havebeenstudiedbypH-potentiometrictitrationandelectronicspectroscopy.Adrenalineperturbsthef-felectronictransitionofNd3+andTm3+sothattheabsorptionspectraoftheircomplexesareshiftedtowardlongerwavelengths.Theabsorptionspectraofthecomplexesformedbythethreef-blockelementionswithadrenalineareshiftedtowardshorterwavelengthswiththeincreaseofPHinΔγ=350～650nm

简介：DifferentphasesofMg-Li-SmalloyswerepreparedbygalvanostaticelectrolysisinLiCl-KCl-MgCl2-SmCl3meltsat670°C.TheelectrolysisprocessandphasecontrolofMg-Li-Smalloyswerestudied.Themicrostructuresofα,α+β,βphasesofMg-Li-SmalloyswerecharacterizedbyX-raydiffraction(XRD)andopticalmicroscope(OM).Analysisofscanningelectronmicroscopy(SEM)andEDSmappinganalysisshowedthatMgdistributedhomogeneouslyinMg-Li-Smalloys.EDSresultshowedthatthedistributionofSmwasmoreat...

简介：高度取向附生、纯(001)面向的CeO2电影被激光在SrTiO3(001)底层上种没有任何气体的分子的横梁取向附生方法周围。CeO2的Layer-by-layer取向附生的生长模式被证实由在situ思考高精力的电子衍射(RHEED)观察。高分辨率的X光检查衍射(HRXRD)和高分辨率的传播电子显微镜学(HRTEM)结果显示了STO(100)//CeO2(100)，STO[100]//CeO2[110]为out-of-plane和在里面飞机的取向附生的关系分别地。取向附生的电影的形成机制也根据一个理论模型被讨论。LMBEceria电影的化学状态被评估并且证实因为Ce3+和氧空缺的存在被介绍。