简介：TiO2nanoparticleswithdifferentphasesarepreparedbyhydrolysisoftitaniumtetrabutoxideinthepresenceofHCl.ThecompositionandmicrostructureoftheresultingsamplesarestudiedbyXRDandTEM.TheseresultsshowthattherangeofparticlesizeofTiO2isfrom20to30nm.ThemechanismofTiO2photocatalysisreactionhasbeendiscussedextensively.PhotocatalyticactivitiesofnanometerTiO2arealsoevaluatedbydegradationofthecrystalvioletsolution.ExperimentalresultsindicatethatthesynergisticactionofH2O2andultrasonicwavegreatlyenhancesphoto-catalyticreactionofTiO2.

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简介：AWaveguideSwitchDesignUsingElectromagneticBandgapSubstrates；Abradingofbabbittmetalmouldwithhighefficiency；ChillcastingoflocomotivedieselIODIO0cylinderliners；Complexevaluationofmaterialsformetalmolds；CurvedSiliconElectronics；Developmentofcurvedholemachiningwithelectrochemicalmachining(lstreport)-processingmethodbyactuator-lesstool；DevelopmentofCurvedHoleProcessingTechniqueUsingElectrochemicalMachining(2ndReport)-Controllabilityofcurvatureofmachinedcurvedhole-

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简介：本文采用磁粉、X射线、CT和超声等无损检测和金相分析等方法对40CrNi2Si2,MoVA钢制零件的磁痕显示进行了系统分析。研究认为，40CrNi2Si2MoVA钢制零件的磁痕显示为显微成分沿变形方向偏析导致的马氏体转变点Ms差异所致。显微成分偏析是钢锭结晶过程中不可避免的，但可通过优化熔炼工艺参数降低显微偏析的程度。本文还分析了四种磁痕显示的类型及其判别方法。

简介：ItiswellknownthatthephotocatalyticactivityofTiO2thinfilmsstronglydependsonthepreparingmethodsandpost-treatmentconditions,sincetheyhaveadecisiveinfluenceonthechemicalandphysicalpropertiesofTiO2thinfilms.Therefore,itisnecessarytoelucidatetheinfluenceofthepreparationprocessandpost-treatmentconditionsonthephotocatalyticactivityandsurfacemicrostructuresofthefilms.ThisreviewdealswiththepreparationofTiO2thinfilmphotocatalystsbywet-chemicalmethods(suchassol-gel,reversemicellarandliquidphasedeposition)andthecomparisonofvariouspreparationmethodsaswellastheiradvantageanddisadvantage.Furthermore,itisdiscussedthattheadvancementofphotocatalyticactivity,super-hydrophilicityandbactericidalactivityofTiO2thinfilmphotocatalystinrecentyears.

简介：Thesegregationanddiffusionofboronduringheattreatmentswerestudied.Theinfluenceofboroncontents,agingtimeandappliedstressonFeMo2B2formationwasalsostudied.Finally,theeffectsofboroncontentsandFeMo2B2formationonthehightemperaturestrengthwerestudied.Boronatomsweresegregatedtoprioraustenitegrainboundaryduringnormalizingtreatment.Andtheseboronatomswereslowlydiffusedintothegraininteriorduringtemperingandagingat700℃.TheFeMo2B2phasewasonlyformedafter1,000hagingat700℃inalloycontaining196ppmboron.TheformationofFeMo2B2phaseisacceleratedbytheappliedstress.ItwasexpectedthattheformationofFeMo2B2iscloselyrelatedtotheredistributionofboronatoms.Thetensilestrengthsat700℃areincreasedwiththeincreaseofboroncontents.However,theformationofFeMo2B2phaseresultsinlowertensilestrength.

简介：Byuseofmicro-DTAtechniqueaswellasambientandhightemperatureX-rayanalysisthephasediagramofNaCl-CaCl2hasbeenchecked.Itis.asimpleeutecticsystemwithasolidsolubilityinthesodiumchlorideside.Theeutecticpointisat773K,49mol%NaCl.Theexperimentalresults,especiallythoseoftheX-raydiffractionstudieshaveshowedthattheincongruentcompound4NaCl-CaCl2doesnotexistintheNaCl-CaCl2system.

简介：ThelongafterglowSrAl2O4:Dy,Euphosphorisliabletohydrolyzeinwaterwithdeteriorationoftheluminescentproperty.SrAl2O4:Dy,Euphosphorswerethereforeheatedat60-90℃inTEOSsoltoformasurfacegelandthenheat-treatedat400℃toobtainSiO2coatedphosphors.ObservationbyTransmissionElectronMicroscope(TEM)andX-rayphotoelectronspectroscopy(XPS)showsthatathinsilicafilmformsonthesurfaceofthephosphors.Thecoatingprocedurecanbeillustratedbyafour-stepprocessandthetransparentsilicafilmcansuppressthehydrolysisprocess,sothattheluminescentpropertiesofthephosphorsareunimpairedorevenbetter.

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简介：使用新介质材料提高高密度线路(HDW)基板的可靠性。作者采用氰酸酯和碳纤维制造了一种高性能PCB基板，将其性能与FR-4进行了对比，并用有限元模型进行了评估，该材料可显著提高高密度线路(HDW)基板的热性能和力学性能，增加封装的可靠性。

简介：通过油井套管穿孔实例对其穿孔种类和原因进行了较为全面的分析，同时提出了预防治理的具体措施。此部分为《治理油井套管穿孔技术的探讨1》的调查资料。

简介：Basedonclustervariationmethod(CVM)andnaturaliterationmethod(NIM),order-disorderphasetransitionintheintercalationcompoundsM1/2TiS2issimulatedbycomputer.Thefavorableconditions,underwhich3a0×a0superstructureisformed,aregiven,andtheresultsareingoodagreementwiththeexperimentsandtheoreticalcalculations.TherelationshipbetweencriticaltemperatureandM-ion-vacancyinteractionparameterislinear.

简介：InordertocontrolthesizeanddistributionofthehighconductiveFe2PinLiFePO4/Fe2Pcomposite,twodifferentcoolingrates(Fast:15℃·min-1,Slow:2℃·min-1)wereemployedaftermechanicalalloying.Thedischargecapacityofthefastcooledwas83mAh·g-1andtheslowcooled121mAh·g-1.TheparticlesizeofthesynthesizedpowderwasexaminedbytransmissionelectronmicroscopyanddistributionofFe2Pwascharacterizedusingscanningelectronmicroscopy(SEM).Inaddition,two-stepheattreatmentwascarriedoutforbetterdistributionofFe2P.X-raydiffraction(XRD)andRietveldrefinementrevealthatLiFePO4/Fe2Pcompositeconsistsof95.77%LiFePO4and4.33%ofFe2P.

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简介：针对成型圆桶形塑料容器难以获得均匀壁厚的问题,给出了实用模具结构.在分析储液塑料容器工艺特点的基础上,详细介绍了模具各系统及成型零件的设计,并论述了模具的工作过程.

简介：BondingofAl2O3tocuisperformeddirectlyusingTifoilattemperatureof1273K.Themicrostructureofthejointinterfaceisinuestigatedthroughscanningelectronmicroscope（SEM）,electron.probemicroanalysis（EPMA）andX-raydiffraction（XRD）.theeffectoftheinitialtifoilthicknessonthereactionlayerthicknessandthejointStrengthareinvestigated.