简介：锁泉华的microfibrous网络由8m(dia)的3vol.%组成镍microfibers被利用了骗诱100200mdia的30vol.%。多孔的Al2O3。ZnO和CaO然后被早期的湿受精方法高度驱散到骗诱的Al2O3的毛孔表面上。由于表面区域，毛孔尺寸/粒子尺寸，热传导性，和空体积的唯一的联合，当在甲醇蒸气改过使用了时，产生microfibrous催化剂composites提供了催化的床反应和利用效率的重要改进。粗略地甲酸盐的260mL/min，包括>70%H2，<5%公司和踪迹CH4，与>97%甲醇变换，能在我们骗诱的新奇microfibrous的1cm3床卷被生产在470湩瑡潩?潰祬敭r合成的ZnO-CaO/Al2O3催化剂?鑈я鑈я8

简介：在中国的大陆的主要工业矿物质粉末的最近的年度输出是超过1亿t，由象粉碎，分类，分离/纯化，和表面修正的如此的支持的技术的活跃开发伴随了。特别地，为准备包含的极其细小的粒子的现在的纸评论技术弄干并且弄湿处理，修正和作文，白陶土泥土的锻烧，并且球形/无角的工业矿物质处理。

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简介：在一家attritor工厂和最小的可完成的粒子尺寸的nanoparticles的磨擦行为被暂停稳定性强烈影响。在现在的工作，暂停稳定性(即nanoparticles的-potential)被作为在湿milling过程磨时间的功能测量pH学习。在在一家attritor工厂的某个时间以后，monotonically没有进一步的尺寸减小和平均产品粒子尺寸增加，这被发现。原因之一是亚微米粒子的生产导致更多的particleparticle相互作用，因而，暂停的pH与磨时间减少。通常pH价值与暂停稳定性有关，它能被NaOH的增加提高解决方案。51.2mV的最大的否定潜力为硅石在12的pH被获得。更高有一样的极性的潜力，将更高是在粒子之间的静电的排斥。因此，最大的静电的排斥力量被pH价值的调整在湿milling维持。实验以是在整个实验的维持的常数的不同pH条件被进行，nanosized粒子因而被获得。

简介：纸是调查利用建设和拆毁(C&D)的可能性的礼品的目的作为波特兰水泥的代用品浪费未加工的饭。那么被使用的C&D浪费，再循环的具体总数(RCA)和再循环的石工技术总数(RMA)在古代希腊的一地方区域从拆毁的大楼被导出，希腊。因为他们的石灰质、硅质的起源，RCA和RMA样品分别地被选择，它遵守了平常的波特兰水泥的作文未加工的饭。为那个原因，水泥的六件样品未加工的饭被准备：有平常的原料的作为一件参考书样品，并且五由在适当比例与RCA和RMA混合参考书样品。产生混合物的反应上的效果，在1350°C，1400°C和1450°C在混合物sintered根据免费石灰内容(fCaO)被评估。测试证明增加的再循环的总数改进了水泥的灼伤能力没有否定地影响水泥clinker性质的未加工的饭。而且，生产的钱ers(在1450°C的sintered)的主要部件(C3S，C2S，C3A和C4AF)的形成被X光检查衍射(XRD)支持。

简介：Thediscoveryofdrawablecarbonnanotubeforestsopenedupthepossibilityofconstructingawiderangeofpurecarbonnanotubemacrostructuresandsparkedinterestsindevelopingapplicationsfromthesestructures,especiallypurecarbonnanotubeyarns.Thisreviewexaminesthevariousfacetsofthedrawablecarbonnanotubeforests,synthesisanddrawability,andtheirresultingyarns,structure,production,propertiesandapplications.Thestructure,formationandpropertiesofcarbonnanotubeyarnsarecomparedwiththoseofconventionaltextileyarnsinordertoobtainabetterunderstandingofthescience,structuralmechanicsandprocessingtechnologyinvolvedincarbonnanotubeyarns.

简介：Theeffectsofcorrugationandwingplanform(shapeandaspectratio)ontheaerodynamicforceproductionofmodelinsectwingsinsweeping(rotatingafteraninitialstart)motionatReynoldsnumber200and3500atangleofattack40°areinvestigated,usingthemethodofcomputationalfluiddynamics.Arepresentativewingcorrugationisconsidered.Wing-shapeandaspectratio(AR)oftenrepresentativeinsectwingsareconsidered;theyarethewingsoffruitfly,cranefly,dronefly,hoverfly,ladybird,bumblebee,honeybee,lacewing(forewing),hawkmothanddragonfly(forewing),respectively(ARofthesewingsvariesgreatly,from2.84to5.45).Thefollowingfactsareshown.(1)Thecorrugatedandflat-platewingsproduceapproximatelythesameaerodynamicforces.Thisisbecauseforasweepingwingatlargeangleofattack,thelengthscaleofthecorrugationismuchsmallerthanthesizeoftheseparatedflowregionorthesizeoftheleadingedgevortex(LEV).(2)Thevariationinwingshapecanhaveconsiderableeffectsontheaerodynamicforce;butithasonlyminoreffectsontheforcecoefficientswhenthevelocityatr2(theradiusofthesecondmomentofwingarea)isusedasthereferencevelocity;i.e.theforcecoefficientsarealmostunaffectedbythevariationinwingshape.(3)TheeffectsofARareremarkablysmall:whenARincreasesfrom2.8to5.5,theforcecoefficientsvaryonlyslightly;flowfieldresultsshowthatwhenARisrelativelylarge,thepartoftheLEVontheouterpartofthewingsshedsduringthesweepingmotion.AsARisincreased,ononehand,theforcecoefficientswillbeincreasedduetothereductionof3-dimensionalfloweffects;ontheotherhand,theywillbedecreasedduetothesheddingofpanoftheLEV;thesetwoeffectsapproximatelycanceleachother,resultinginonlyminorchangeoftheforcecoefficients.

简介：Anoveltwo-stagereductionprocessforsynthesisofultrafinenickelpowderwithahighpurityandlowdensityinafluidizedbedreactorhasbeendevelopedinthiswork.TherawultrafineNiOparticlesarefirstpre-reducedusinghydrogenatlowertemperatures(340-400℃),followedbyfurtherreductionathighertemperatures(500-600℃).Theself-agglomerationofNiparticlesformedduringlow-temperaturereductiondecreasesthesinteringactivityofthenewlyformedultrafineNiparticles,leadingtogoodfluidizationquality,evenforthesubsequenthigh-temperaturereductionprocess.TheagglomeratedNiparticleshaveahighNicontent(above99wt%),alowdensity(0.78g/cm~3)andauniformparticlesize(approximately100μm).Aconceptdesignforanoveltwo-stagefluidizedbedreactorprocessusedtoproducehigh-purityNipowderwasalsoproposed.Thisapproachmaybeextendedtothesynthesisofotherultrafine/nanosizedmetalsormetaloxidesthroughafluidizationmethod.

简介：Ammoniumsulfateresidueisaparticulatesolidandisproducedduringthemanufactureofammoniumsulfatefertilizer.Theresidueusedinthisstudycontainedalargeportionofcalciumcarbonate,fromwhichactivelime（CaO）wasrecoveredviathermaldecomposition.Weusedapurpose-builtdevicetodecomposetheresidueinasemi-suspensionstate.WefoundthatCaOhadthehighestactivitywhenresiduewasdecomposedat850-900℃.OurexperimentsindicatedthatammoniumsulfateresidueshouldbedecomposedinasuspensionstatetoproduceactiveCaO.Basedonourlaboratorytestfindings,anindustrial-scaleproductionlinewithahighsolid/gasratioinasuspensionstatewasdevised.TheoptimaloperatingconditionsforthedecompositionoftheammoniumsulfateresiduetoproducehighqualityCaOwerealsoinvestigated.WefoundthattheCaCO3decompositionratewashighandtheCaOproductwashighlyactive,averaging170sbythecitricacidmethod.MorphologymeasurementsshowedthattheCaOproducthadaporousstructureandalargespecificsurfaceensuringhighactivity.