简介：AlSiCp(65vol.%原文如此)电子包装材料被塑造的粉末注射(PIM)和压力渗入过程生产以便获得近塑造网的部分。泉华pre过程在1150K获得的SiCppreformed协议高有力量和好外观，和到全部的孔的开的孔的比率是将近98%。composites的相对密度比99%大。这个方法制作的AlSiCpcomposites的热传导性是198W.m?1.K?1，并且热扩大(CTE)的系数是8.0x10?6/K(298K)。

简介：TheapplicationtechnologyusingBaosteelsteelslagpowderasanadmixtureofconcreteisthedevelopmentaldirectionofsteelslagrecyclingtreatmentandutilization,whichfullyreflectsthebasicfeaturesandgoodcompatibilityoftheover-calcinedclinkerofsteelslagresources.Itisbeneficialtofullyexploitthewaterhardeningcharacteristicandpotentialactivityofsteelslag,toreduceandcontroltheunstablefactors,suchasfreecalciumoxideandmagnesiumoxide,andtorealizehighvalue-addedapplicationsandexplorenewapplicationfields.

简介：Hydrogenthermalplasmajetwasemployedtopreparenano-sizedboronpowderwithhydrogenreductionofBCl3.Themaximumyieldofnano-sizedboronpowderswasabout50%withtheoperationalconditionsofH2/BCl3of4.5:1,totalfeedof4.9m3/h,andplasmapowerof25kW.ThesampleswereanalyzedbyX-raydiffraction（XRD）,fieldemissionscanningelectronmicroscopy（FE-SEM）,andinductivelycoupledplasma-massspectrometry（ICP-MS）,inductivelycoupledplasma-atomicemissionspectrometry（ICP-AES）,inductivecombustioninfraredabsorption（ICIA）andinfraredthermalconductivityofoxygenandnitrogenanalyzer（ITCA）.Theresultsshowthattheboronpowdershavedifferentcrystalstructureswithhigherdispersionandpurity.Theaveragediameterisabout50nm,andthepurityis90.29%orso.Thisnewtechnologycanusesimpleprocesstoproducehighqualityboronpowders,andisfeasibleforindustrialproduction.

简介：Coprecipitationsupercriticalfluiddryingtechnologyhasbeenemployedtosynthesizecalcia-stabilizedzirconiaultrafinepowderwithlow-costinorganicsaltsasthestartingmaterials.Thesinteringbehaviorsofthesepowderswerealsoinvestigated.Theresultsshowedthatsupercriticalfluiddryingcouldeffectivelyalleviatethehardagglomerationofgrainsduringthegeldryingprocess,andthemorphologyofthepowderretainedthenetworktextureoftheoriginalgel.Theresultingparticleswerecharacterizedbysmallparticlesize(5～20nm),bettermonodispersityandhighsurfacearea,whichgaverisetohighactivityandsinterability.Consequently,thesepowderscouldreadilybecompactedintothedesiredshapeandtheirdensificationcouldbecarriedoutinshortertimeandatlowertemperatures.Forinstance,nanometer-sizedpowdercalcinedat600℃for2hcouldbecold-pressedintoagreenbodyandsinteredat1100°for0.5htoattainadensebodywithbulkdensityof5.9718g/cm3andspecificporevolumeof0.0008cm3/g.

简介：Becauseoftheradioactivityandtoxicnatureofnuclearmaterials,theircontainmentwithinoxidematrices,encasedinsealedcontainers,hasbeenproposedasasuitablemeansforstorageandtransportation.However,containerfailuresbecauseofcracksorsmallorificespresentamajorleakageriskfornuclearmaterials,consequentlyposingasignificanthazardtotheenvironmentandhumanbeings.Inthisstudy,terbiumoxidepowderwasusedasanuclearmaterialrepresentativetoexaminetheleakageofnuclearmaterialpowderthroughorificeslocatedatthebaseofapressurecontainer.Thedependenceoftheorificediameter,thepowderlayerthickness,andtheinternalpressureofthecontainerontheleakagemechanismandamountwasexamined.Asimplifiedmodelcorrelatingthedependenceoftheabove-mentionedparameterstodeterminetheutmostleakageamountwasalsodevelopedbasedonthepresentresults.Theleakageofthenuclearmaterialpowderwasassessedbymeasuringitsconcentrationusinganopticalparticlecounter.Thediameteroftheorificedeterminedthepowderleakagemechanism,whichinturninfluencedtheamountofleakageproduced.Comparisonstudiesshowedthatunlikethechangesinthedifferentialpressure,thevolumeofthecontainerhaslittleeffectontheleakageamount.Undersufficientlyhighinternalpressures,theoxidepowdercanbereleasedasafineaerosol.Theworkisnotonlycrucialfromthenuclearsafetyaspect,butisalsobeneficialforthesafeapplicationofpowderandnanoparticles.

简介：铝泡沫三明治被rolling-bonding/powder准备在脸表/粉末和粉末密度的契约力量上滚动的冶金的起泡沫技术，和效果被学习。而且，起泡沫的代理人，TiH2，热被对待，Mg的某个数量在一次尝试被增加进粉末理解泡沫的稳定性和一致性怎么被改进。试验性的结果证明有理想的质量的起泡沫的先锋被结合转动的过程获得。当卷减小是67%时，粉末的一致性活动范围到99.87%。在整个脸表/核心层粉末和粉末的变丑特征结合的考虑，卷减小的最佳是60%70%。裂缝和排水被起泡沫的代理人TiH2的热处理和Mg的某个数量的增加在起泡沫期间禁止。TiH2的最佳热处理方法是在450点保存1个小时的那热???眶?嘠伲‵???ㄠ‵吗？

简介：Theblastresistanceofstructuresusedinbuildingsneedstobeinvestigatedduetotheincreasedthreatofaterroristattack.ThedamagedonebyCompositionBorPowergeltosteelfibrereinforcedreactivepowderconcrete(SFRPC)panelsandordinaryreinforcedconcrete(RC)panelsofequivalentstaticflexuralstrengthiscompared.A0.5kgchargewasdetonatedatadistanceof0.1mfromthe1.3m×1.0m×0.1m(thick)panels,whichweresimplysupportedandspaning1.3m.Dynamicdisplacementmeasurements,high-speedvideorecordingandvisualexaminationofthepanelsforspallandbreachwereundertaken.TheSFRPCpanelswithstoodthebarechargeblastbetterthanthereinforcedordinaryconcretepanels.Neithertypeofpanelwasbreachedusinga0.5kgcharge.TheRCpanelexhibitedmorespallingwhenCompositionBwasused.UndersuccessiveCompositionBloadingconditions,theRCpanelwasbreached.IncomparisontheSFRPCpanelwasnotbreached.ExposuretofragmentingchargeloadingconditionsconfirmedtheseperformancedifferencesbetweentheSFRPCpanelandthereinforcedordinaryconcretepanel.

简介：InordertoobtainultrafineNd-Fe-Bpowder,aspray-driedprecursorwastreatedbyreduction-diffusion(R/D)process.And,unliketheconventionalR/Dprocess,calciumreductionthatisacrucialstepfortheformationofNd2Fe14BwasperformedwithoutconglomeratingtheprecursorwithCapowder.Byadoptingthismodifiedprocess,itispossibletosynthesizethehardmagneticNd2Fe14Batthereactiontemperatureaslowas850℃.TheaveragesizeofNd2Fe14Bparticlesthatareuniformlydistributedintheoptimallytreatedpowderwas＜＜1μm.MostNd2Fe14BparticleswereenclosedwiththinlayersofNd-richphase.TypicalmagneticpropertiesofsuchpowderwithouteliminatingimpurityCaOwereiHc=～5.9kOe,Br=～5.5kG,and(BH)max=～6MGOe.

简介：Inaflowinjectionseparationandpreconcentrationsystemincorporatingamicrocolumn,theadsorptionbehavior(effectofpH,kineticadsorptioncapacity)ofmetalionsCu^2+,Cr^3+,Mn^2+,Ni^2+,La^3+,Eu^3+,Ga^3+,Mo(Ⅵ)andW(Ⅵ)onTiO2owderwithdifferentcrystalstructureandparticlediameterwasstudiedandcompared.Inaddition,theechanismoftheadsorptionofmetalionsonTiO2owderwasexplored.TheresultsshowthatcrystaltructureandparticlediameteroftheTi02powderwillefinitelyaffecttheadsorptioncapacityofmetalsont.

简介：Inthispaper,theinflucnceofchiefprocessparametersontheontinuousproductionofSi3N4powderbyrenitridationhasbeenstudied,Thesutiableprocessparametershavebeenfound,andhighqualitySi3N4powderhasbeendeveloped.

简介：AhypereutecticAl-Sialloypowderwaspreparedbyultrasonicgasatomizationprocess.Themorphologies,microstructureandphaseconstituentofthealloypowderwerestudied.TheresultsshowedthatpowderofthealloywasveryfineanditsrnicrostructurewasmainlyconsistedofSicrystalsplusintermetalliccompoundAl9FeSi3,whichwere.veryfineanduniformlydistributed.

简介：

简介：TheinfluenceofthreedifferentAl2O3powderonself-flowingaluminacastablewasstudied.MaximumcompactionofsamplewascomputedbyAndresenEquation.TheresultshowedthattheAl2O3powder,whichhasmuchsmallerparticlesize,couldimprovethemicrostructureandthemechanicalpropertiesofcastableunderroomtemperatureandhightemperature.Withthesamepowdersize,theroomtemperaturestrengthofthecastableaddedwithAl2O3powderproPertiesofwhichwerealteredbyaddingmineralizingagent,washigherthanthatofthecastableaddedwithcommonAl2O3powder,buttheflowabilityofthesethreedifferentcastablewasalmostthesame.

简介：Epoxy/graphenenanoplatelets(GNP)粉末涂层用GNP和融化混合挤出方法的超声的predispersion被制作。epoxy/GNPs粉末涂层的等温的治好动力学借助于即时Fourier变换被监视有一个加热房间的红外线的光谱学(英尺红外)。epoxy/GNPs的机械性质治好涂层被调查了，由评估他们有扫描在three-point-bending测试以后的电子显微镜学(FE-SEM)的地排放的破裂表面。epoxy/GNPs的热稳定性治好涂层被thermo-gravimetric分析(TGA)学习。等温的治好动力学结果证明GNP不影响自动催化的反应机制，但是在玩的1.0wt%添加剂下面装载GNP在治好epoxy/GNPs粉末涂层的一个提示角色。破裂紧张，破裂坚韧和epoxy/GNPs的影响抵抗治好在装载的GNP(1wt%)的底层戏剧性地增加的涂层，显示GNP能改进epoxy/GNPs粉末涂层的坚韧。从破裂表面的FE-SEM研究，而且，epoxy/GNPs的可能的韧化机制治好涂层被建议。TGA结果证明GNP的加入改进了治好的涂层的热稳定性。因此，GNP修改了环氧基树脂能是一条有效途径与改进他们的热稳定性一起韧化环氧基树脂粉末涂层。

简介：ＴｈｅｒｍａｌｂｅｈａｖｉｏｒｏｆＢ４Ｃｐａｒｔｉｃｌｅｓｕｎｄｅｒｐｌａｓｍａａｒｃｐｏｗｄｅｒｓｕｒｆａｃｉｎｇｃｏｎｄｉｔｉｏｎ￥ＷＡＮＧＸｉｂａｏ；ＺＨＡＮＧＷｅｎｙｕｅ；ＬＵＴｏｎｇｌｉａｎｄＰＥＮＧＪｉｅ(ＨｅｂｅｉＵｎｉｖｅｒｓｉｔｙ...

简介：Anisotropicpowderwaspreparedwithprecursor(NdDy)-(FeCoNbCu)-Bsinteredmagnetsbyhydrogendecrepitation,desorption,andsubsequentannealingtreatment.Thehydrogendesorptionwasperformedinmagneticfieldsof0,1,3,and5T.Theorientationoftetragonalphasegrainsofthepowderwasevaluatedfromthehysteresisloopsmeasuredbyextractionmagnetometer.Residualhydrogencontentofthepowderwasevaluatedbythermal-magneticanalysis.ThepowderwithHcj,Br,and(BH)maxof1138kA·m-1,1.029T,and172.5kJ·m-3,respectively,wasachievedundertheconditionofthemagneticfieldof3T.Magneticpropertiesofthepowder,especially,theremanenceofthepowder,areenhanceduponmagneticfields,whichisduetobetterorientationofpowderparticlesandlessresidualhydrogeninthepowderresultedfromthemagneticfieldduringthehydrogendesorptionprocess.

简介：MoltensaltsynthesisofMgAl2O4powderfromindustrialaluminaandlightcalcinedMgOinKCl,LiCl,andKCl-LiClmedia,andtheinfluenceofKFat500-1000℃wereinvestigated.SynthesizedpowderswerecharacterizedbymeansofXRD,laserparticleanalyzer,andSEM,andthesynthesismechanismofMgAl2O4wasdiscussedaswell.Theresultsshowthat(1)themoltensaltcomposite(KCl-LiCl)ismorefavorableforthesynthesisofMgAl2O4thansinglemoltensalt(LiClorKCl),andLiClismorefavorablethanKCl;(2)KFcanacceleratetheformationofMgAl2O4anddecreaseitsformingtemperature;(3)synthesisofMgAl2O4powderinthemoltensaltswithoutKFiscontrolledby'template-growth'mechanism,butinthemoltensaltswithKF,itiscontrolledby'template-growth'and'dissolution-precipitation'mechanism.

简介：ＥｌｅｃｔｒｏｎＭｉｃｒｏｓｃｏｐｉｃＩｎ－ｓｉｔｕＯｂｓｅｒｖａｔｉｏｎｆｏｒＰｒｅｐａｒａｔｉｏｎｏｆＵｌｔｒａｆｉｎｅＬａ２Ｏ３ＮａｎｏｐｈａｓｅＰｏｗｄｅｒＧａｏＹｕｚｕｎ（高愈尊），ＬｉＹｏｎｇｈｏｎｇ（李永洪），ＺｈａｎｇＴａｉｓｏｎｇ...

简介：有从30～80nm的尺寸的Fe3O4nanoparticles被湿milling铁粉末在一家行星的球工厂综合。阶段作文和同样综合的产品的形态学被X光检查衍射(XRD)测量，扫描电子显微镜学(SEM)和传播电子显微镜学(TEM)。NanosizedFe3O4粒子被湿milling准备金属性的铁粉末(?200网孔，99%)在与不锈钢装备的一家行星的球工厂，使用的小瓶与50:1并且以300rpm的旋转速度的ball-to-powder团比率在提取的水下面熨球。在这个方法的铁球的使用在Fe3O4formation起了一个关键作用。现在的技术简单，这个过程是容易的执行。

简介：Auranylcompound,K4UO2（CO3）3hasbeencharacterizedbypowderX-raydiffractionmethod.M.W.=606.46,monoclinic,C2/c（No.15）,a=1.0240（7）,b=0.9198（4）,c=1.2222（12）nm,β=95.12（4）°,V=1.1466（5）nm3,Z=4,Dm=3.468g/cm3,Dc=3.513g/cm,λ（CuKα1）=O.1540598nm,T=298K.ThestructurewassolvedbyheavyatommethodandFouriersynthesis,andrefinedbyfull-matrixleast-squaresmethodtoR=0.1185for275reflections.Theuranium（Ⅵ）atomisinaneight-coordinatedistortedhexagonal-bipyramidalenvironmentwithcreasyfanshape.Thelinearuranylgroupapproachestoperpendiculartotheequatorialplaneinwhichthreecarbonategroupsarechelated.U（Ⅵ）hastwolinearoxygenatomsclosertoit（U-O=0.1767（5）nm）thansixotherneighbours（U-Orangingfrom0.2516to0.2568nm）.Thedistancesbetweencarbonatomsanduncoordinatedoxygenatomsare0.122（1）and0.123（1）nm,whicharedistinctlydifferentfromthosebetweencarbonandcoordinatedoxygenatoms（mean0.134（6）nm）.Thisfactrevealsthenon-eq-uivalenceofoneoxygenatomtotheothertwoineachcarbonate.InK4UO2（CO3）3,theO-Odis-tancefortheadjacentcarbonategroupsis0.2794（4）nmapproachingtothesumofVanderWaalsradiioftwooxygenatoms.TheK-Odistancesvarybetween0.2667and0.3131nm,andeachanionisimmediatelysurroundedbysixpotassiumions,onlyfourofwhichcanbeconsideredtobelongtothesamestructuralformulaunit,andtheyaresymmetricallylocatedaboveandbelowtheequatorialplane.