简介：为了进一步降低生产成本，葫芦岛有色综合利用厂科学论证，创新思路，打破精铋生产中加锌除银工艺的传统，将加入精锌除银改用B号锌代替，可减少成品精锌使用量，减少资金占用，降低生产成本。此项工艺改造于2014年9月份开始实施，葫芦岛有色克服了原料变化产生的影响，通过不断调整工艺参数，摸索B号锌合适的加入量，逐渐稳定了生产工艺。

简介：Theeffectofanexternalelectricfieldonthecrystallizationbehaviorofamorphous(Nd0.1Fe0.9)3Balloywasinvestigated.ThecrystallizationproductofNd2Fe23B3phasewasobtainedforthisamorphousalloyannealedat923Kfor300sinthepresenceofanexternalelectricfieldof300kV·m-1(50Hz);whilethecrystallizationproductsareNd1.1Fe4B4,α-Fe,andFe3Bphasesunderthesameannealingconditionexceptforfree-electricfield.Ontheotherhand,thesampleswereannealedat1023K,whichishigherthanthedecompositiontemperatureofmetastableNd2Fe23B3phase,for600s.Inthecaseofthepresenceofanexternalelectricfield,themetastableNd2Fe23B3phase,asamainphase,isstillstayedinthesample.ThisfactsuggeststhattheexternalelectricfieldenhancesthestabilizationofthemetastableNd2Fe23B3phase.Theeffectoftheexternalelectricfieldonthephaseselectionandstabilizationwasexplainedintermsofthespecificconductancedifferencebetweenthecrystallizationproducts.

简介：4月6日晚举行的2013年博鳌亚洲论坛年会“对话比尔·盖茨：为穷人投资”对话会上，比尔及梅琳达·盖茨基金会联席主席兼理事比尔·盖茨表示，在短短30年中，中国在民生领域、减少贫困方面取得了巨大的成功，期间中国帮助6亿人口摆脱了贫困，

简介：近日，据省经信委介绍，争取到5500万元中央投资重点产业振兴和技术改造专项资金，山西省6个新建项目获得中央专项资金支持。

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：TheNd60Fe20Al8Co10B2alloywaspreparedbysuctioncastingofthemoltenalloyintoacoppermoldunderargonatmosphere.Themicro-structuralandmagneticpropertychangesintheNd60Fe20Al8Co10B2alloyduringcrystallizationwereinvestigatedbyX-raydiffraction(XRD),differentialscanningcalorimetry(DSC),scanningelectronmicroscope(SEM)andthevibratingsamplemagnetometer(VSM).TheprecipitationandNd-richandFe-richphaseshavenosignificanteffectontheintrinsiccoercitityforNd60Fe20Al8Co10B2alloyannealedbelow723K.However,thegrowthofFe-richphasedecreasesthesaturatemagnetizationandremanenceofthealloy.Thehardmagneticbehaviorisdisappearedwhenthealloyisfullycrystallized.

简介：La15Fe77B8hydrogenstoragealloyswerepreparedusingavacuuminduction-quenchingfurnace.TheresultsofX-raydiffraction(XRD)andscanningelectronmicroscopy(SEM)suggestedthatLa15–xSmxFe2Ni76Mn5B2(x=0,2,4,6)alloyshadmultiphasestructureincludingthemainLaNi5phase,La3Ni13B2phaseand(Fe,Ni)phase.WiththeincreasingsubstitutionofSmforLa,themainphasestructureofalloysdidnotchange,whiletheunitcellvolumesdecreased,thecyclestabilitywasimprovedandthemaximumdischargecapacitydecreased,butthelowtemperaturemaximumdischargecapacityofthesamesubstitutionalloywasgraduallyapproachingthemaximumdischargecapacityatroomtemperature,whichshowedthatLa15Fe77B8hydrogenstoragealloysofthepartialsubstitutionofSmforLahadbetterlow-temperaturedischargeability(LTD).Forthesamesubstitutionalloys,self-dischargecharacteristicsandcyclestabilityatlowtemperaturewerebetterthanthatatroomtemperature.Furthermore,thehigh-ratedischargeability(HRD)andtheexchangecurrentdensityI0firstincreasedandthendecreasedwiththeincreasingofSmcontent,whereasthehydrogendiffusioncoefficientDinalloybulkdecreasedgradually,whichindicatedthatappropriatesubstitutionofSmforLaimprovedtheelectrochemicalkineticspropertiesofthealloys.TheHRDwasmainlydominatedbythecharge-transferrateonthealloysurface.

简介：InordertoimprovethehydrogenationanddehydrogenationperformancesoftheMg2Ni-typealloys,MgwaspartiallysubstitutedbyLainthealloy,andmeltspinningtechnologywasusedforthepreparationoftheMg20-xLaxNi10(x=0,2,4,6)hydrogenstoragealloys.ThestructuresofthealloyswerestudiedbyX-raydiffraction(XRD),scanningelectronmicroscopy(SEM)andhigh-resolutiontransmissionelectronmicroscopy(HRTEM).Itwasfoundthatnoamorphousphaseformedintheas-spunLa-freealloy,buttheas-spunalloyscontainingLaheldamajoramorphousphase.WhenLacontentx≤2,themajorphaseintheas-castalloyswasMg2Niphase,butwithfurtherincreaseofLacontent,themajorphaseoftheas-castalloyschangedintoLaNi5+LaMg3phase.Thermalstabilityoftheas-spunalloyswasstudiedbydifferentialscanningcalorimetry(DSC),showingthatspinningratewasanegligiblefactoronthecrystallizationtemperatureoftheamorphousphase.Thehydrogenabsorptionanddesorptionkineticsoftheas-castandas-spunalloysweremeasuredusinganautomaticallycontrolledSievertsapparatus,confirmingthatthehydrogenabsorptionanddesorptioncapacitiesandkineticsoftheas-castalloysclearlyincreasedwithrisingLacontent.ForLacontentx=2,theas-spunalloydisplayedoptimalhydrogendesorptionkineticsat200°C.

简介：有一致形态学的新奇红射出的K2(Ge,Si)F6:Mn4+黄磷被一起沉淀方法综合。纯K2有P636阶段>除P3m1空间组以外的mc空间组就被Si的加入在K2在房间温度的GeF6根据XRD描述。薄片状的显示出的SEM图象和为K2GeF6:Mn4+和K2(Ge,Si)F6:Mn4+黄磷分别地。光致发光刺激(PLE)和光致发光(PL)在K2GeF6:Mn4+和K2(Ge,Si)F6:Mn4+系统。并且K2有Si的GeF6:Mn4+显示出一座强壮的山峰。同时水晶的地包围Mn4+变化能在这个氟化物系统影响腐烂时间。带的设备的颜色范围基于K2(Ge,Si)F6:Mn4+和K2分别地，GeF6:Mn4+到达了多达94.58%NTSC(国家电视标准委员会)和94.386%NTSC那基于氮化物红黄磷比那高得多。在K2(Ge,Si)F6:Mn4+黄磷的所有这些原来的特征作为为改善灯光和常规白LEDs的显示质量的红黄磷为潜在的应用是合乎需要的。

简介：Pt-freecounterelectrode（CE）composedofLa2MoO6（La2O3-MoO3）wassuccessfullysynthesizedbysimplepyrolysisoflanthanumacetate（C6H9O6La·xH2O）andhexaammoniumheptamolybdatetetrahydrate(（NH4）6Mo7O24·4H2O).Furthermore,threeproportionscompositescatalystsofLa2MoO6@MWCNTsbasedonLa2MoO6andmultiwallcarbonnanotubes（MWCNTs）werepreparedandcharacterizedasPtfreecatalystforCEindye-sensitizedsolarcells（DSSCs）.ThemorphologyandstructureofLa2MoO6@MWCNTscompositesweredeterminedbyscanningelectronmicroscopy,transmissionelectronmicroscopeandX-raydiffraction.TheelectrochemicalperformanceofLa2MoO6@MWCNTscompositecatalystsforCEswasdeterminedbyphotocurrent-voltagemeasurements,cyclicvoltammetry,electrochemicalimpedancespectroscopy,andTafelpolarization.Thepowerconversionefficienciesof4.68%,4.87%and5.06%areobtainedforLa2MoO6:MWCNTswiththemassratiosof5:1,3:1and1:1towardsthereductionofI3-toI-underthesameconditions,respectively,whicharesuperiortothoseofMWCNTs（3,94%）andLa2MoO6（1.71%）electrodes.TheexperimentalresultsrevealthatthepresenceofMWCNTsresultsinanaugmentedactivecatalyticsurfaceareaandenhancedchargetransferfromCEtotheelectrolyte.

简介：EffectsofNbandZrsubstitutionsonthecrystal]izationbehaviorsandmagneticpropertiesofmelt-spun(Nd,Pr)2Fe14B/α-Fealloyswerestudied.Theresultsshowthatfor(Nd0.4Pr0.6)8.5Fe85.5B6ribbons,themetastable(Nd,Pr)3Fe62B14precipitatesaftertheinitialcrystallizationofα-Feanddecomposesintothefinalmixtureof(Nd,Pr)2Fe14Bandα-Fe.For(Nd0.4Pr0.6)8.5Fe84.5Zr0.5Nb0.5B6ribbons,however,(Nd,Pr)2Fe14Bandα-Fephasesprecipitatesimultaneously.ThisindicatesthatbothNbandZrdopingcanavoidtheformationofmetastablephaseand!

简介：近日，北京市委组织部、市人力社保局联合发布公告称，北京将首次面向全国公开招聘6名聘任制公务员。

简介：

简介：Eu2+andDy3+codoped(Ca,Sr)7(SiO3)6Cl2yellowphosphorsweresuccessfullysynthesizedbyself-fluxmethod.Thestructure,morphologyandphotoluminescencepropertieswereinvestigatedbyX-raydiffraction(XRD),scanningelectronmicroscopy(SEM)andphotoluminescencespectra.Theas-preparedphosphorshowedabroademissionspectrumcenteredat550nmforEu2+single-dopedphosphor,whilelocatedat548–544nmfortheEu2+,Dy3+codopedsamplesunderexcitationat380nmlight.TheemissionintensitywasgreatlyimprovedwhenDy3+wasdopedintothe(Ca,Sr)7(SiO3)6Cl2:Eu2+system.Thecomposition-optimizedsamplewith3mol.%ofDy3+andconstant10mol.%ofEu2+exhibiteda220%PLenhancementcomparedtothephosphorwith10mol.%Eu2+single-doped.Meanwhile,itwasfoundthatthequantumefficiencyofphosphornamely(Ca,Sr)7(SiO3)6Cl2:3mol.%Dy3+,10mol.%Eu2+couldgetupto24.6%.Thesynthesizedyellow-emitting(Ca,Sr)7(SiO3)6Cl2:Dy3+,Eu2+isapromisingcandidateashigh-efficiencyyellowphosphorforNUV-excitedwhiteLEDs.

简介：近日，内蒙古科技厅组织专家组对包头稀土研究院承担的一项科技型中小企业技术创新基金项目“高功率La-Fe-B系贮氢电极合金的应用开发研究”进行了验收，

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.

简介：上世纪70年代以来，Sm—Nd同位素体系一直被广泛应用于地球化学示踪和地质年代学研究中，为获取岩石的形成时间、演化及其地球动力学背景提供了重要参数。精确测定143Nd／144Nd和147Sm／144Nd比值是获取准确年龄和初始值的前提条件。