简介:Inpursuingexcellentsupercapacitorelectrodes,wedesignedaseriesofM0S2/C0S2compositesconsistingofflower-likedMoS2andoctahedron-shapedCoS2throughafacileone-stephydrothermalmethodandinvestigatedtheelectrochemicalperformanceofthesampleswithvarioushydrothermaltime.Duetothecouplingoftwometalspeciesandabigamountofwell-developedCoS2andMoS2,theresultsindicatedthattheMoS2/CoS2compositeselectrodesexhibitedthebestelectrochemicalperfor-mancewithalargespecificcapacitanceof490F/gat2mV/sor400F/gat10A/gamongallsamplesasthehydrothermaltimereached48h(MCS48).Furthermore,theretentionofMCS48is93.1%after10000cyclesat10A/g,whichmanifeststheexcellentcyclingstability.TheoutstandingelectrochemicalperformanceofMCS48indicatesthatitcouldbeaverypromisingandnovelenergystoragematerialforsupercapacitorsinthefuture.
简介:以便得到TiB2-Al2O3的同质的混合物和协议,一个表面修正方法被用来准备nano规模的杂交Al2O3涂的TiB2粒子。PE蜡粒子是第一到由杂交,然后nano规模Al2O3粒子的TiB2粒子上涂又是涂的到由PE蜡粒子涂的TiB2的表面上。SEM,TEM和版本被用来描绘同样收到的核心/壳粒子和它的协议的微观结构。试验性的结果显示出那粒子规模TiB2和Al2O3的同质的分散能不仅在混合粉末而且在使脱蜡的协议被形成。协议当时是由煤气压的sintering(GPS)的sintered。物件顶端的装饰物产品显示出与参考样品由正常方法制作了作比较的改进技工性质。
简介:虚拟仪器(LabVIEW)开发环境与PLC之间可通过RS-232、RS-485、以太网等多种接口进行通信。通信协议可使用PLC厂家开发的非开放协议(如西门子公司的PPI协议),也可使用开放的协议如施耐德公司开发的Modbus。随着越来越多的PLC本体集成以太网接口,采用ModbusTCP/IP协议的基于以太网接口的通信方式被广泛应用到电气设备中。实践证明,这种通信方式成本低廉,编程简单,可大大缩短程序开发时间并降低电气硬件成本。
简介:SiO2-B2O3-Al2O3-CaO在低sintering温度使契约成玻璃,高力量被讨论。FTIR和XRD分析被用来与铝的不同内容描绘基本使成玻璃的契约的结构。弯曲力量和热扩大系数也被测试。同时,在660光线衍射(XRD)的sintering温度的合成标本的微观结构,扫描电子显微镜(SEM)分析和其它工具。结果证明分别地,钾和磷的溶解率在95.64wt%lessthan的一种谷物尺寸的条件下面是70wt%和93.7wt%0.074公里,9.78gg-1硫磺的酸,0.5gg-1铵氟化物,160桴???瑳畲瑣牵獥椠?慭湩慴湩摥映吗??
简介:TiB2ceramicspowderwassynthesizedfromB2O3-TiO2-Mgsystem.TheeffectsofTiB2additionasdiluentonthecombustionsynthesisprocesswereinvestigated.TheresultsofthermodynamiccalculationandexperimentsshowthattheincreaseofTiB2contentrangingfrom0to20wt%canreducetheadiabatictemperatureTadfrom3100Kto2896KandcombustiontemperatureTcfrom2139Kto1621Krespectively.TheparticlesizeandhalfwidthoftheparticledistributionarealsoincreasedwiththeadditionofTiB2increasingfrom0to20wt%.ThecombustionproductisamixtureofTiB2,MgO,andotherintermediatephases.TheleachedproductcontainsmainlyTiB2,TiO2andTiN,anditsoxygencontentis7.77wt%.
简介:TiO_2isapromisingphotocatalyst.However,thelowphotocatalyticefficiencycallsforthemodificationofTiO_2.Metal-andnonmetal-dopingofTiO_2havebeenprovedtobeeffectivewaystoenhancephotocatalyticproperties.Thisreviewprovidesadeepinsightintotheunderstandingofthemetal-andnonmetal-dopedTiO_2photocatalysts.ThisarticlebeginswiththeintroductionofthecrystalstructuresofTiO_2andapplicationsofTiO_2materials.Wethenreviewedthedoped-TiO_2systemintwocategories:(1)metal-dopedTiO_2photocatalystssystem,and(2)nonmetal-dopedTiO_2photocatalystssystem.Bothexperimentalresultsandtheoreticalanalysesareelaboratedinthissection.Inthefollowingpart,fortheadvantagesofTiO_2thinfilmsoverparticles,variouspreparationmethodstoobtainTiO_2thinfilmsarebrieflydiscussed.Finally,thisreviewendswithaconciseconclusionandoutlookofnewtrendsinthedevelopmentofTiO_2-basedphotocatalysts.
简介:用organo听Sn(OC4H9)4作为先锋,钠dodecylsulfonate(SDS)和SDS明胶(SDS-G)象模板复杂,二听二氧化物胶体的粒子被准备由一自己组装方法。两个SnO2产品分别地与SDS-G与SDS和SnO2-C粒子被标记SnO2-B粒子,它在制作相应于SnO2-B和SnO2-C传感器的SnO2煤气的传感器被使用。X光检查衍射(XRD),扫描电子显微镜学(SEM),传播电子显微镜学(TEM)和thermogravimetry和不同热分析(TG/DTA)被用于描述。试验性的结果证明SnO2-B胶体的粒子由mesoporous组成像片的粒子,当SnO2-C粒子主要由球形的粒子组成时。煤气的察觉到大小证明那个SnO2-B传感器执行察觉到反应到所有目标气体的最好,包括H2,C2H5OH和液体石油气体(LPG)。特别地,SnO2-B传感器的察觉到的反应在1000潩獮的集中在H2空气在32点被完成
简介:石墨和ZrB2–SiC的氧化行为修改了石墨合成在1×105Pa空气和0.2×105PaO2。氧化测试在一个感应的加热炉子被进行。这二材料的氧化跟随了线性率法律。在2100°C的石墨和C–ZrB2–SiC的坚定的半径损失率在1×105−2和1.05×10−2%/s>Pa空气,和3.23×10−2和2.21×10在0.2×105−2%/s>PaO2,分别地。ZrB2并且原文如此的加入显著地减少了石墨的氧化率因为在氧化期间在样品表面上形成的氧化物规模在减少暴露的表面区域帮助在下面底层。在有一样的氧的二不同气氛部分压力,石墨和C–ZrB2–SiC在0.2×105PaO2比在1×105Pa空气。氧化为石墨和C–ZrB2–SiC的控制率的步被建议分别地是通过边界层并且通过在氧化物规模的毛孔的氧的里面的散开。一个模型基于散开理论被建立在他们的氧化行为上讨论全部的煤气的压力的效果。
简介:Aneffectivedispersion-strengtheningphaseinAl-8Fe-2Mo-2Zr-2Nd-0.7Ti-1.6SialloywasidentifiedtobeanagedprecipitatephasewithpossiblechemicalstoichiometryofAl20(Ti,Mo)2Ndandfcccrystalstructurewithao=1.455nm.ThestructurewasdeterminedtobeFm3mspacegroup.
简介:Theimplantedionrange,thedepthprofileandthefilmsttuctureoftheimplantedlayerwerestudied;thecarrierconcentrationandthemobilityweremeasured;theconductivitymechanismofthefilmimplantedFeintoAl2O3ceramicwasdiscussed.TheconclusionisthattheimplantedFe2+ionsmoveintoAl2O3latticeandreplaceAl3+toformsubs-titutionimpuritiessothattheionimplantedlat-tice,ascomparedwiththeoriginalone,presentsaneffectivenegativechargewhichformsanegativechargecenter.Avacancyisboundarroundit,andanacceptorisintroducedintheforbiddenband.
简介:Sodiumparanitrophenolatedihydrate(NPNa·2H2O)isanexcellentsemiorganicnonlinearoptical(NLO)material,crystallizesbothinwaterandmethanolwithhighdegreeoftransparency.Goodopticalqualitysinglecrystalsofdimensionupto18mmx6mmx3mmareobtainedbyisothermalsolventevaporationtechnique.Thesolubilityofthecrystalindifferentsolventswasmeasuredgravimetrically.ThesinglecrystalsofNPNa·2H2Oshowvariationinphysicalpropertiesandgrowthrateindifferentsolvents.Methanolorethanolsolutionyieldscrystalsofbipyramidalshapewithclearmorphology.However,methanolgrowncrystalisexhibitingimprovedhardnessparametersandpossessesexcellentthermalstabilityascomparedtowatergrowncrystals.TheeffectsofsolventonhardnessparameteralongwiththermalandopticalpropertiesofNPNa·2H2Owasrevealedinthispaper.
简介:Ag-TiAlintermetallicalloy,Tie45Ale2Nbe2Mn(at.%)e0.8vol.%TiB2,hasbeenprocessedfromgasatomizedprealloyedpowderbyfieldassistedhotpressing(FAHP).Aninitialanalysisoftheprealloyedpowderhelpedontheunderstandingoftheintermetallicsinteringbehavior.Atomizedpowderconsistedofametastablephasethattransformedintoa2tgequilibriumphasesbythermaltreating.Differentpowderparticlemicrostructureswerefound,whichinfluencethemicrostructuredevelopmentoftheFAHPg-TiAlmaterialdependingonthesinteringtemperature.Duplex,nearlylamellarandfullylamellarmicrostructureswereobtainedatthesinteringtemperaturesabove1000C.Lowerconsolidationtemperatures,below1000C,ledtotheformationofanAlrichphaseatpowderparticleboundaries,whichisdeleterioustothemechanicalproperties.Highcompressiveyieldstrengthof1050MPawasobservedinsampleswithFAHPduplexmicrostructuresatroomtemperature.Whereasnearlylamellarandfullylamellarmicrostructuresshowedyieldstrengthvaluesof655and626MPaatroomtemperatureand440and425MPaat750C,respectively,whicharesuperiorincomparisontosimilaralloysprocessedbyothertechniques.Theseexcellentpropertiescanbeexplainedduetothedifferentvolumefractionsofthea2andgphasesandtherefinementofthePMmicrostructures.
简介:
简介:研究了NaCl—MnO2改性沸石填料柱对水中Zn^2+的动态吸附性能。探讨了填料厚度、Zn^2+的初始质量浓度和流速对穿透曲线的影响。结果表明,NaCl-MnO2改性沸石能有效去除水中的zn^2+,填料层增厚,穿透曲线上的穿透点向右移动,穿透时间延长;而流速、Zn^2+的初始浓度增大,穿透曲线上的穿透点向左移动,穿透时间缩短;用Thomas模型描述Zn^2+初始质量浓度为50mg/L、滤速为4mL/min时改性沸石对Zn^2+的吸附动力学,相关系数为0.9994,平衡吸附容量为12.04mg/g。
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