简介：本文分析了某公司二期CO2压缩机润滑油消耗高的原因。提出了改进措施。以及实施后取得了较好的节能效果，进一步指出了CO2压缩机的节能空间。

简介：EffectofLa-richrareearthoneutecticmicrostructureinA1-2%Fealloywasstudied.WhentheadditionofREissmall,a-A1phaseisintheformofcellulardendrite.WiththeincreaseoftheadditionofRE,thenucleationandgrowthofa-A1dendritearesuppressed,andeutecticAl3Fephaseisrefined.WhentheadditionofREgetsto0.6%(massfrac-tion),thesizeofeutecticAl3Feincreases.Inaddi-tion,mechanismoftheeffectofmixedREoneutecticmorphologyofA1-2%Fealloyisexplored.

简介：Differentfluxeswereusedtosynthesizelongpersistencephosphors,calciumsulfidesactivatedbyEu2+andTm3+,byconvenientsolid-statemethod.ThephosphorusingNH4Fasafluxhasgoodcrystallinityandlargeparticlesize,itsstabilityagainstwaterandotheratmosphericcomponentsisenhanced,anditsafterglowislongerandfluorescentintensityismoreintensethanthoseofthephosphorusingNH4Clasflux.TheirPLintensitiesvariedwithtimeinmoistairweremeasured,noremarkablechangewasfoundforthosepreparedwithNH4FfluxincontrastwithNH4Clasflux.SousingNH4Fasfluxisagoodmethodtoenhancethestabilityofalkalineearthsulfides.

简介：本文分析了山西分公司二期CO2压缩机润滑油消耗高的原因,介绍了采取的针对措施以及2002年取得的节能效果,并进一步指出了CO2压缩机的节能空间.

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简介：EffectofMnsubstitutionforFeincubicLavesZr0.1Tb0.9(Fe1-xMnx)2andY0.1Tb0.9(Fe1-xMnx)2com-poundsispresented.Similarresultsinbothsystemsareobtained:ThestructureandthemagnetismofTbFe2arebothinfluencedslightlybyasmallamountofYorZrsubstitutionforTb;Withincreasingxvalue,thelatticeconstantincreasesmonotonously;theCurietemperaturedecreaseslinearly;whilesaturationmagnetizationincreaseslinearly.ForthesmallamountofMnsubstitutionforFeinbothsystems,magnetostrictionissignificantlylargerthanthatinthepureironalloys.Thelargestmagnetostrictionof|γ‖-|γ|=2200×10-6atmagneticfieldof2×107/4πA/misobtainedforY0.1Tb0.9(Fe0.95Mn0.052.

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

简介：介绍了陕西钢铁集团有限公司应用铌微合金化技术生产HRB400E高强抗震钢筋的生产情况。经检验,该工艺生产的产品化学成分和力学性能完全满足国家最新标准要求,且具有一定的经济效益。

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简介：美国宇航局在加州帕萨迪纳的喷气推进实验室研究成功了一种制造YBa2Cu3O7-α高温超导电缆（封装在金属套管内）的新方法。据称,这种方法成本较低,过程易于控制,且对各种前体材料有很强的适应能力。该法分4个步骤:生产具有化学（配）比的前体（Precursor）粉;将前体粉包封在金属套管内;用轧制的方法使前体粉固结;在液态锂金属浴槽内进行处理,使之转变成超导组

简介：TheTiO2nanomembranedopedbyREionswerepreparedbymixingREionsintoTiO2solutionandthephoto-catalyticpropertiesofthecoatingglasswithTiO2membranedopedbyREionstomethylbenzenedegradationunderultravioletwereinvestigated.AFMphotoesshowthatthesurfaceofcoatingglasswithTiO2nanomembranedopedbyCe3+,Ce4+,Y3+arecomposedofparticleswithdiametersof30～50nm.Theresearchesonphoto-catalyticpropertiesprovethatthesurfaceofcoatingglasswithTiO2nanomembranedopedbyREionspossessesgoodphotocatalyticpropertiesunderultravioletandthedegradationpercentsofmethylbenzenearemorethan90%whenthedegradationtimeisshorterthan160min.WhenthemoleratioofCe3+,Y3+,Ce4+toTiO2is0.002thedegradationpercentsofmethylbenzenearerespectively92.85%,91.87%and91.15%under254～365nmultravioletin50μg·ml-1methylbenzenesolution.ThephotocatalyticabilityofthesurfaceofcoatingglasswithTiO2nanomembranedopedbyCe3+underultraviolettodegrademethylbenzeneincreasesastheconcentrationsofREionsincreaseandtheiroptimumpercentageofdegradationare98.50%,97.50%and96.35.5%respectively.Thehighertheconcentrationofmethylbenzenesolutionthelowerthepercentsofthemethylbenzenedegradationofthecoatingglassare,andthebiggertheratiooftheareasofcoatingglasstothevolumeofmethylbenzenesolutionthehigherthedegradationeffectofmethylbenzeneis.

简介：Ceriasphereswithdifferentsizesandsulfurizedproductswithcorrespondingmorphologywerepreparedbyhydrothermalandgas-solidreactionmethodat600–800°CunderCS2atmosphereforashorttime,respectively.Dimensionaleffectinpreparationofγ-Ce2S3wasfirstlyinvestigatedbymeansoftechniquessuchasscanningelectronmicroscopy(SEM),X-raydiffraction(XRD),thermalgravimetricanalysis(TGA)andspectrophotometer.Theresultsshowedthatwhenceriananoparticleswithsmallsizewereusedasprecursors,theγ-Ce2S3couldbepreparedatthelowertemperatureandthebadlysinteredproductswereobtained;whenceriananoparticleswithlargesizewereemployedasprecursors,pureγ-Ce2S3wasdifficultlyobtainedevenifthetemperaturewasupto800°Candtheproductstendedtokeeptheiroriginalsize.Theheat-resistancepropertyoftheγ-Ce2S3withlargesizewasbetterthanthesmallerone,andthepureγ-Ce2S3preparedfromprecursorwithsmallsizehadagoodpigmentaryperformance.

简介：经过槽下系统的设备改造,实现了槽下过筛,入炉粉率降低,为一系列的技术进步提供了基础保障,阐述了各项生产技术进步与生产实践.

简介：CeO2nanoparticles(nano-CeO2p)wereaddedintolasercladdedNiCoCrAlYcoatingsonNi-basedsuperalloysubstratetoimprovethemicrostructureandproperties.Scanningelectronmicroscope(SEM),X-raydiffractometer(XRD),micro-hardnesstester,andheattreatmentfurnacewereemployedtoinvestigatetheirmorphologies,phases,micro-hardnessandthermalshockresistance,comparedwiththecoatingwithoutnanoparticlesadded.Theresultsshowedthatthemicrostructureandpropertiesofthecoatingswiththeaddition...

简介：对梅钢2号高炉封炉后的开炉快速达产实践进行了总结。实践表明,通过进行充分的开炉准备,实施科学合理的开炉方案以及精心地操作调剂,高炉顺利开炉,3d快速达产。

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.

简介：Anisotropicstructures,nanoneedles,andnanospindlesofrareearthhydroxychloride(RE(OH)2Cl)andoxychloride(REOCl)(rareearth=EuandTb)weresynthesized.Therareearthhydroxychloridenanostructureswereformedviaathermallyassistedhydrolysisoftherare-earthsesquioxidenanocrystals.Themorphologicalevolutionofthenanostructureswasstudiedusinghigh-resolutiontransmissionelec-tronmicroscopyandscanningelectronmicroscopy,whilethestructuralevolutionwasinvestigatedusingX-raydiffractiontechniques.Thethermalstabilityoftherareearthhydroxychlorideswasinvestigatedusingthermogravimetricanalysis.Therareearthoxychloridenanospin-dlesweresynthesizedviaasimpleheat-treatmentofrareearthhydroxychloridenanospindles.

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简介：介绍宁钢2号高炉热风炉因隔墙砖发生坍塌导致低风温生产而带来的问题,并针对问题提出相应的技术操作措施,包括通过改进送风模式稳定风温水平,通过采取上、下部调剂相匹配的措施保证气流的稳定分布,通过调整进风口面积和炉顶压力维持一定的鼓风动能和理论燃烧温度,通过控制合适的炉温和炉渣碱度确保炉况稳定顺行。

简介：TheAu/CeO2catalystsweresynthesizedbyco-precipitation(CP),deposition-precipitation(DP)andmetalliccolloidsdeposition(MCD)method,andtestedforoxidationofvolatileorganiccompounds(VOCs).ItwasrevealedthattheAu/CeO2catalystpreparedbyDPmethodwasthemostefficientcatalysttowardsthetotaloxidationoftoluene.TheAu/CeO2catalystshadobviouslyhighcatalyticactivity,andthebestresultswasobtainedon3wt.%Au/CeO2catalystpreparedbyDPmethod.Thesecatalystswerechara...