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简介：与一个二阶段的方法，分散得好有狭窄的尺寸分发的5.2nmAgnanoparticles(

简介：Self-lubricatingcoatingshavebeenwidelyusedtoreducefrictioninmovingmachineassemblies.However,thetribologicalperformanceofthesecoatingsisstronglydependentontheservicetemperature.Inthispaper,anextensivereviewpertainingtotheinfluenceofoperatingservicetemperatureontribologicalperformanceofself-lubricatingcoatingshasbeencarriedout.Basedontheeffectivelubricatingtemperaturerange,theself-lubricatingcoatingsdevelopedinthepasthavebeendividedintothreegroups：lowtemperaturelubricantcoating（from-200℃toroomtemperature）,moderatetemperaturelubricantcoating（fromroomtemperatureto500℃）andhightemperaturelubricantcoating（〉500℃）.Ideasconcerningpossiblewaystoextendtheoperatingtemperaturerangeofself-lubricatingcoatingshavebeenpresentedasfollows：hybridizedtribologicalcoating,adaptivetribologicalcoatings,anddiffusionratelimitedsolidlubricantcoating,inaddition,anewself-lubricatingcoatingformulationforpotentialapplicationatawideoperatingtemperaturerangehasbeenproposed.

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简介：Thetechnologyofactivationbyaddingfewactivators(<1%)toincreasetheamountofblendsincementwasinvestigated.Theresultsshowthatouteractiva-tionhasaremarkableeffectonimprovingthephysicalpropertiesofslagcement,flyashcementandvolcaniccement.Forexample,thecompressivestrengthwasincreasedby5-10MPa.Morever,theapplicationofactivationisbeneficialtogrind-aiding,earlystrengthandwater-reducingetc.

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简介：钛氧化物(TiO2)上的Ag簇的形成nanoparticles被完成由selfassembly过程和锻烧。获得的nanoparticles被X光检查描绘衍射(XRD)，传播电子显微镜学(TEM)，和紫外可见光谱学(紫外力)，并且常规技术(XRD，TEM并且紫外力)被用来在TiO2表面上识别Ag粒子。结果证明Ag-TiO2粒子能被使用改进苯乙烯氧化物的epoxidation的催化活动。苯乙烯氧化物作为由把Ag-TiO2nanoparticles用作催化剂的氧化剂是有H2O2的催化反应的主要产品。苯乙烯氧化物的高催化的activitity能在80el是可获得的被锻烧在1000

简介：白手起家的断然控告了nanofiltration(NF)膜被用来对待纺织品染料自河为影响象操作压力那样的nanofiltration过程的复用，和因素产生水，喂fl嗷并且膜清洗被调查。与1.0MPa和40L/h的feedflow的一个应用压力，这NF膜在完成100%的浓度移动的TDS，咸度和电导率为CODcr和约51.0%的减小有93.3%的移动。通过这膜获得的permeate对再循环合适。而且，膜能在与1%NaOH答案被清洗以后被再使用。

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简介：Fourier变换红外线的光谱学(英尺红外)和希腊语的第六个字母潜力被介绍在表面性质ofnanodiamond(ND)上学习不同修正参数的效果。结果证明在激动人心的磨擦条件下面，ND难总数被打碎，他们上的一些活跃的点与表面活化剂分子反应了，它在它的希腊语的第六个字母潜力和稳定性导致了增加。表面修正的不同模型也在这研究被给。

简介：Byanalogueexperimentofexhaustgas,thesensitivecharacteristicsoftitaniatoair/fuelratiowasinvestigated.Theeffectsofsomeimpuri-tiesontheelectricconductivityofTiO2,thedeviationof（A/F）cfrom（A/F）sinnonequilibriumgassystemandtheself-catalyticoxidationofTiO2wereexplainedrespectively.Theeffectsofca-talyst,porosityandthicknessofsensorelementontheresponsetimewasalsoanalyzed.

简介：Themoisturetransportincrackedcement-basedmaterialswasinvestigatedwithprioritybynumericalsimulation.Thecrackedcement-basismaterialwastreatedastwocomponentssystem,includingthecracksandcementitiousmortar.Themassbalancebetweenthewaterinthecracksandinthecementmortarwasconsidered.Fromthemodelingresults,itwasseenthatthewaterorvaporfilledthecrackimmediatelywhenthecrackedcementitiousmortarwasputintocontactwiththewaterorvapor.Thewater/vaporpenetratesintothemortarfromthecracksurfaces,aswellastheexternalsurfaceexposedintheoutsidecondition.Theexistenceofcracksincreasesthepenetrationofwater/vaporintothecementitiousmortar.Asthebasisforstudyingtheself-healingincrackedconcrete,thesimulationonmoisturetransportprovidedimportantinformationaboutthewaterdistributionandmovementinsidethecrackedconcrete.

简介：LeachingexperimentsonmetakaolinshowthatthefinalAlextractionratioreachedinabatchreactionisstrikinglyinfluencedbytheinferiorporestructuregeometryofthemetakaolinpellets.Bycalciningkaolinparticlesadheredinlowhumiditystate,avarietyofmetakaolinpellet,insidewhichalargeopeningsstructuredeveloped,hasbeenprepared.Thestructureremarkablybenefitsleachantiontransference,so,thevarietyhashighacidleachingreactivity,evencoarseasthepelletsare,itsaluminumextractedratiostillhasalinearrelationshipwithleachingtime,andtheleachingkineticsismaintainedzeroorderuptoasignificantconversiondegree.ArevisedPellet-ParticleModelhasbeendevelopedtointerpretthestructureinfluenceonAlextractionratio.

简介：Inthispaperforsavingenergytwodifferentburningmethodsofcementclinkerformationhavebeenstudied.Oneistherapidburningmethodandtheotherisordinaryburningmethodsimulatingrotarykiln,andtheyarecomparedbythekineticpointofview.Theresultrevealsthattheactivationenergyofrapidburningismuchlowerthanordinaryburning.Forlookingintothecause,themainrawmaterial—limestonewasburntbythesametwomethodsandthestructureofproductCaOhasbeendetected.ItcanbefoundthatthemicrostructureofCaOproducedbyrapidburningislooser;latticesconstantsaregreater;crystaldefectsaremoreandparticlesizeissmallerthanthatproducedbyordinaryburning.Thesecausethechemicalreactionmoreactive.Sotheactivationenergyofclinkerformationofrapidburningismuchlowerthanthatoftheordinaryburning.

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简介：Inthiswork,compressive,flexuralandsplittensilestrengthtogetherwithcoefficientofwaterabsorptionofhighperformanceself-compactingconcretecontainingdifferentamountofFe2O3nanoparticleshavebeeninvestigated.ThestrengthandthewaterpermeabilityofthespecimenshavebeenimprovedbyaddingFe2O3nanoparticlesinthecementpasteupto4.0wt%.Fe2O3nanoparticleasaforeignnucleationsitecouldaccelerateC-S-HgelformationasaresultofincreasedcrystallineCa(OH)2amountespeciallyattheearlyageofhydrationandhenceincreasethestrengthofthespecimens.Inaddition,Fe2O3nanoparticlesareabletoactasnanofillersandrecovertheporestructureofthespecimensbydecreasingharmfulporestoimprovethewaterpermeability.Severalempiricalrelationshavebeenpresentedtopredicttheflexuralandthesplittensilestrengthofthespecimensbymeansofthecorrespondingcompressivestrengthatacertainageofcuring.Acceleratedpeakappearanceinconductioncalorimetrytests,moreweightlossinthermogravimetricanalysisandmorerapidappearanceofpeaksrelatedtohydratedproductsinX-raydiffractionresultsindicatethatFe2O3nanoparticlesupto4wt%couldimprovethemechanicalandthephysicalpropertiesofthespecimens.

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