简介：BulknanocrystallineSmCo6FesinteredmagnetwaspreparedbySparkPlasmaSinteringtechnique(SPS).XRDpatternsshowthatthemagnetexhibitsastableTbCu7structure.TEMobservationindicatesthatthemicrostructureofthemagnetiscomposedofSmCo6Fesinglephasegrainswithanaveragegrainsizeof30nm.Magneticmeasurementshowsthatunder9Tmagneticfield,thecoercivityofthemagnetreaches1.12T;thesaturationmagnetizationandtheremanenceare1.13and0.67T,respectively.Themagnethasa(BH)maxof75.6kJ·cm-3.

简介：CeB6粉末被CeO2，B2O3和Mg作为反应物在被拿的高温度的自我繁殖的合成(SHS)准备。SHS反应的断热的温度和动力学被调查。SHS反应产品和沥滤的产品被X光检查衍射(XRD)和扫描电子显微镜学(SEM)描绘。结果比让反应由自己宣传的1800K，和明显的激活精力(Ea)和反应在微分扫描热量测定(DSC)曲线是的Mg-B2O3-CeO2上订发热的山峰的(n)的显示Mg-B2O3-CeO2反应系统的断热的温度相当高23.03kJ/mol并且1.31，分别地。明显的激活精力更低，因此反应容易发生了。SHS产品由MgO，CeB6和小Mg3B2O6组成了。沥滤的产品由单个CeB6阶段组成了，它的纯净比99.0%高，并且CeB6的平均粒子尺寸比150nm小。

简介：介绍了奥氏体焊缝组织及薄板在超声波探伤检测应用的主要难点，描述了常规扫描成像超声检测方法和相控阵超声检测方法两种检测方法特点，针对生产的4mm厚纯镍N6板材焊接组织采用两种方法进行探伤检测试验，选定检测设备型号、焊接方法及焊接参数，按照检测要求制备试验试块。通过检测分析得出，常规超声检测方法在较好的条件下，仍然对厚度、组织特性无法实现有效检测；相控阵超声检测方法能够明显的检测出薄板焊缝奥氏体组织缺陷。

简介：由于稀土市场的无序竞争,产量失控,使我国稀土产品的价格急剧下滑,大部分产品已经是低于成本销售,使中国的稀土行业受到严重的打击,许多稀土企业出现亏损,举步艰难。为了保护中国稀土的宝贵资源并稳定部分稀土产品价格,在内蒙古包钢稀土高科技股份有限公司的倡议下,甘肃稀土公司、包

简介：介绍了6kV高压开关柜在露天矿中的应用，针对应用中存在的问题进行了改进，改进后的高压开关柜在供电上更加安全、可靠。

简介：ThephotocatalystsK4Nb6017andK4Nb6017dopedwithFe^3+andCr^3+werepreparedbysolidstatereactionandwerecharacterizedbypowderx-raydiffraction,UV-visdiffusivereflectanceandscanningelectronmicroscopy.ThephotocatalyticactivityofK4Nb6O17andK4Nb6O17dopedwithFe^3+,Cr^3+wereinvestigatedwithmethanolaselectrondonorandPtaspromotercatalystunder+400nmUVirradiation.Thedifferenceofphotocatalyticactivitybetweenthemwasalsodiscussed.TheindividualrateofhydrogenevolutionfortheK4Nb6O17,Fe-K4Nb6O17andCr-K4Nb6O17asphotocatalystsare5.35,5.00,6.25mmol·L^-1.h^-1respectively.

简介：本文针对选矿过程控制的实现，结合金川集团公司选矿6000t/d扩能项目的配套自动化系统的实践，简要论述了该控制系统的结构，各磨浮控制回路的实现思路和具体实现方法。

简介：Thenoveleomplexesofalkaliandrareearthmetalwithperiodatehavebeenpreparedforthefirsttime.ChemicalanalysisindicatesthatthecompositionofthecomplexesisM2LnIO6·xH2O（M=Li,Na,K;Ln=Pr,Tb）,andallofthecomplexeshavebeencharacterizedbyUV-Visible,IRspectroscopicstudies,susceptibilitymeasurementsandthermalanalysis.

简介：AseriesofCeB6-dopedandCeO2-dopedCa1-xSiAlN3:xCe3+（denotedasCASN:Ce3+@CeB6andCASN:Ce3+@CeO2,respectively）weresynthesizedbyalloy-nitridationmethodunderhigh-puritynitrogenatmosphere.Themorphologies,crystalphases,andluminescencepropertieswereinvestigatedindetail.WithanincreaseintheconcentrationofCeB6,theunitcellvolumeofCASN:Ce3+@CeB6slightlyincreasesduetothesubstitutionbetweenions,whichleadstoachangeofmicrostructurearoundCe3+.CASN:Ce3+@CeB6efficientlyemitsyellow-orangelightwithamaximumemissionintensityataround550nmforthecontentxof0.01（beingincomparablesituation,CASN:Ce3+@CeO2isx=0.04）whenexcitedat460nm.ComparedwithCASN:Ce3+@CeO2,theredemissioncomponentofCe3+inCASN:Ce3+@CeB6ismuchstronger.Thisisascribedtoenergytransferofintra-Ce3+（withinoneCe3+ion）andinter-Ce3+（betweenCe3+andCe3+ions）.Inaddition,thereplacementsofN3-（0.132nmforCN=4）andO2-（0.124nmforCN=4）byB2-（0.140nmforCN=4）,whichcanleadtoamarkedexpansionofthehostlatticeandadecreaseoftheoxidationofsamples,arealsoresponsiblefortheincreaseofredemissioncomponent.Furthermore,CASN:Ce3+@CeB6phosphorhasanexcellentthermalstabilitybecauseofthepartialsubstitutionofCe-O（Ce-N）bondsbymorecovalentCe-B.Asaresult,theoutstandingluminescentpropertiesofCASN:Ce3+@CeB6phosphormakeitpracticaltouseinthesinglephosphor-coatedhigh-color-renderingpowerwhiteLED.

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：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：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：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.