简介：AseriesofLa2O3/MCnylonnanocompositeswerepreparedviainsitupolymerization.Theeffectsofcontentofnano-La2O3onthemechanicalpropertiesofnanocompositeswerestudied.Dispersionofnano-La2O3inMCnylonmatrixwasobservedwithSEM.ThecrystalstructureofnanocompositeswascharacterizedbymeansofXRD.SEManalysisshowsthatLa2O3nanoparticlesareuniformlydispersedinMCnylonmatrixandlittleclusteringexistswhenthecontentofnano-La2O3islowerthan1%,however,whenthecontentofnano-La2O3ismorethan1%,itbeginstocluster.XRDanalysisindicatsthatnano-La2O3doesnotchangethecrystalstructureofMCnylon.Mechanicalpropertiestestsshowthatthetensilestrength,elongationatbreak,impactstrength,flexuralstrength,andflexuralmodulusofnanocompositesfirstincreasethendecreaseasthecontentofnano-La2O3isincreased.Whenthecontentofnano-La2O3is0.5%,thetensilestrengthandelongationatbreakofnanocompositesreachmaximum,whichare17.9%and52.1%higherrespectivelythanthoseofMCnylon.Whenthecontentofnano-La2O3is1.0%,theimpactstrength,flexuralstrengthandflexuralmodulusofnanocompositesreachmaximum,whichare36.6%,12.7%and16.3%higherrespectivelythanthoseofMCnylon.

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简介：Inthispaper,varioustechniquesincludingBET,XRD,SEMandXPSwereusedtostudythesinteringofpureandLa2O3-dopedtitania.Theexperimentalresultsshowthatsinteringoftitaniaproceedsviavolumediffu-sion.Addingoflanthanumoxidedecreasestherateofsinteringandhindersthephasetransitionfromanatasetorutilecrystalbystrongsurfaceinteractionbetweenthemixedcrystals(La4Ti9O24,La0.66TiO2.99)andTiO2.

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简介：韶钢2500m3高炉供上料系统的设计,采取了合理的工艺流程,运用了一些先进实用、节能环保的新技术,为高炉实现优质、高效、低耗、环保创造了条件.

简介：在不同温度下对用金属锰法制得Ｍｎ３Ｏ４粉末和含有部分Ｍｎ（ＯＨ）２的Ｍｎ３Ｏ４粉末分别进行除气处理，然后用静态氮吸附法对其进行对比实验，测试其在各自温度处理后的比表面积。结果表明，在金属锰法制取高纯Ｍｎ３Ｏ４粉末时，应使部分Ｍｎ（ＯＨ）２保留下来，然后对其进行高温（如２００℃）处理，这样可以大大提高高Ｍｎ３Ｏ４粉末的比表面积。

简介：经过充分地分析和论证两座300m~3级高炉1997年一季度炉况顺行差、经济技术指标不好的原因,决定采用蒸汽加湿鼓风技术,并针对以前加湿操作的不足之处,做了改进和完善,运行实践证明:此项技术使炉况顺利明显改善,并获得增产,节焦和铁水质量提高的良好效果。

简介：日前，中国有色金属工业协会及中国铝业公司的专家对中铝青海分公司申报的科技成果进行了鉴定，指出该公司的五项科技成果达到国内先进水平。

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简介：Sm3+dopedsodalimesilicateglassesco-dopedwithAs2O3werepreparedandcharacterisedbymeasuringtheirabsorptionspectrainUV-VIS/NIRregionsandluminescencespectrainthevisibleregion.Judd-Ofeltintensityparameters,Ωλ,wereevaluatedfromthemeasuredintensifiesofthevariousabsorptionbands.ΩλparametersoftheseglasseswerecomparedwiththeΩλparametersofotherreportedSm3+glassestostudythebondingenvironmentsurroundingtheSm3+inthepresentglasses.Presenceof[AsO4]3-tetrahedrainthesecondcoordinationspherearoundthecentralSm3+ionmadetheseglasseslesscovalentascomparedtootheroxideglassesbuttheratioΩ4/Ω6ofthe～1.83indicatedthemtobefairlystable.WiththehelpofΩλparametersandluminescencedataforvariousemissionlines,radiativepropertiesfordifferentemissionlineswerecalculated.Thevaluesofradiativepropertiesindicatedthat4G5/2→6H7/2and4G5/2→6H9/2transitionsresponsiblefororangeluminescencemightbeusedinthedevelopmentofmaterialsforLED'sandotheropticaldevicesinthevisibleregion.

简介：单斜晶、六角形的LaPO4:5mol.%Eu3+黄磷与仅仅在一样的合成温度由一个热水的方法调整答案的pH价值被综合。被不同准备影响的Eu3+-dopedLaPO4,的微观结构，形态学和光致发光调节，被X光检查衍射(XRD)描绘，扫描电子显微镜学(SEM)，Fourier变换红外线的光谱学(英尺红外)，拉曼光谱学和光光谱学分别地。然而，标本在强壮的酸答案显示出单斜晶的结构它在弱酸答案和强壮的碱答案变成了六角形的结构。单斜晶的LaPO4:Eu3+显示出最长的长度到直径比率，它被归因于优先的生长[-112]。单斜晶的标本与六角形的标本相比在红外线的系列，拉曼乐队位置和费用转移(CT)展出了细微红移动。而且，谷物尺寸的计算结果，格子参数，在在拉曼模式和排放积分紧张的半最大值的完整的宽度在对分析结果的好同意。单斜晶的标本显示出最大的绝对的光量收益(0.4)和第二一生2(0.52ms)，它与在CIE的红橘子的排放是一致的。5D07F1在六角形的标本占据了一个dominate位置，它显示在六角形的结构的更多的Eu3+被占据对称地点的倒置中心。

简介：分光镜并且在钠fluoroborate(SFB)的Nd3+离子的荧光性质眼镜通过光吸收，排放和腐烂大小被准备并且描绘。精力水平分析用免费离子的Hamiltonian模型被执行。试验性的振荡器力量被测量记录的吸收山峰包含的区域决定因为1.0mol.%Nd3+-做了眼镜。Judd-Ofelt参数(2,4,6)被用来评估象放射的转变那样的激光特征参数概率(AR)，放射的腐烂时间(R)，荧光分叉比率(R)和刺激排放为4F3/2的剖面图(e)亚稳的状态。为Nd3+离子的不同集中的荧光系列被在514.5nmAr+离子激光使样品激动记录。

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：ThemeasurementsoftemperaturedependenceofthemagneticsusceptibilityofLa1-xSrxCoO3perovskiteoxidesatdifferentSrdoping(0≤x≤0.5)andannealingtemperaturewerepresented.Forthesamplewithx=0.1,ashoulderwasobservedaround150K,andapeakwhichisonefeatureofspinglassappearedaround50Kinthecurveofsusceptibilityversustemperature.Thehigh-temperature(250～420K)susceptibilityfitswellwithCurie-Weisslawforallsamples.WeissconstantandeffectivemagneticmomentweredeterminedandtheirvariationswithSrdopingandoxygenannealingconditionwereobtained.TheWeissconstantincreasesmonotonouslywithSrcontentforx>0.2.Thevaluesofeffectivemomentswereinterpretedwiththespinstateofcobaltions.Studiesonthesusceptibilitiesofthesampleswithx=0.2underdifferentpreparationtemperaturesandannealingtemperaturesshowthattherisingofsinteringtemperatureandannealingtemperaturewillincreasethepara-ferromagnetictransitiontemperature,andreducetheeffectivemomenttonormalvalue.OurresultshowsthatbothCo3+andCo4+ionsshouldbeinISstateafterannealingandtheoxygenannealingcausesthetransitionofCo3+spinstatefromHStoIS.

简介：对八钢A高炉开炉及其生产准备经验进行了总结。由于开炉准备充分，开炉料方案制定合理，开炉操作得当，实现了顺利开炉。

简介：太钢3号高炉喷煤系统采用三罐并列、喷吹主管加分配器的喷吹形式,喷吹装置最大喷吹能力为煤比250kg/t。主要特点：三罐并列喷吹计量准确;采用浓相喷吹,实现了对氮气的回收;使用两段式喷枪、一键式全自动操作等。喷吹系统2007年8月投产,平均煤比180kg/t以上,个别月份达到200kg/t。经过两年的生产实践证明,该系统设计合理,一直处于良好的运行状态。

简介：TheNd3+3.2%(atomfraction):KGd(WO4)2crystalwasgrownbyKyropoulosmethod.TheabsorptionspectrumandfluorescencespectrumofNd3+:KGWcrystalweremeasured.Theabsorptioncrosssectionsat808nm(0.6799×10-20cm2)werecalculated,andtheoutputwavelengthoffluorescenceis1064and1351nm.Thediode-pumpedlaserwasoperatedbothinthefree-runningandpassivelyQ-switchedoperatingmodes.Themaximumlaseroutput(1064nm)is326mWwith62.7%slopeefficiencywheninputenergyis900mW.ThebeamqualityfactorM2≈1.1.Thegreenlightof532nmisobtainedinfrequencydoublingoperation.ThelaserispassivelyQ-switchedbyusingCr4+:LuAGassaturableabsorber.Thepulsewidthis170nsatrepetitivefrequencyof15kHZ.

简介：VariousopticalluminescencespectroscopictechniqueswereusedtocharacterizethehighTcsuperconductorYBa2Cu3Ox.TheemissionbandsrevealthatCu3+coexistwithCu2+andCu+inthismaterial.

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