简介：昆虫能在整个身体的元素的集中极大地变化。与Ni亢奋的蓄电池植物联系的昆虫的最近的调查与相对提高的整个身体的Ni层次识别了昆虫。可得到的有限数据的评估显示500μgNi/g的整个身体的Ni集中是非凡的：我建议有一个平均数的昆虫种500μgNi/g珍视或更大在幼虫/nymph或成年的阶段，被认为“一只high-Ni昆虫”。用500μgNi/g标准，high-Ni昆虫的15种类在Mpumalanga(南非)从研究被识别了到日期，新喀里多尼亚和加利福尼亚(美国)。Ni集中报导了的最高的平均数是为南非的Stenoscepa种的美女的3500μgNi/g(直翅目：Pyrgomorphidae)。high-Ni昆虫(66%)的多数是heteropteran草食动物。high-Ni昆虫主人偏爱的研究显示他们是monophagous(或将近这样)在特别Ni亢奋的蓄电池植物种上。许多在这些昆虫的身体的Ni在他们的勇气(多达66%75%)，但是提高的层次也被发现了在肾小体小管，为处理一本high-Ni食谱作为一策略建议有效消除。Ni的织物层次通常比内脏集中低得多，但是多达1200μgNi/g从脱下的皮被报导了，建议molting可以是Ni消除的另一条小径。这些昆虫的高Ni集中的一生态的功能可以是对生来的敌人保卫他们，但是标明日期仅仅一试验性的测试支持了“这元素的防卫”假设。社区级的研究显示high-Ni昆虫动员Ni进食物网，但是Ni的简历累积不发生在植物草食动物或草食动物食肉动物步。Unsurprisingly，Ni简历累积索引为与另外的昆虫种类相比的high-Ni昆虫是更大的在Ni亢奋的蓄电池植物上喂。有进由Ni亢奋的蓄电池植物，而是没有high-Ni昆虫的花的昆虫来宾的食物网的Ni动员的一些证据花的来宾被报导了。

简介：Thedeactivationbehaviorbycrystallitegrowthofnickelnanoparticlesonvarioussupports(carbonnanofibers,zirconia,SiC,α-Al_2O_3andγ-Al_2O_3)wasinvestigatedintheaqueousphasereformingofethyleneglycol.SupportedNicatalystsof~10wt%werepreparedbyimpregnationofcarbonnanofibers(CNF),ZrO_2,SiC,γ-Al_2O_3andα-Al_2O_3.TheextentoftheNinanoparticlegrowthonvarioussupportmaterialsfollowstheorderCNF~ZrO_2>SiC>γ-Al_2O_3>>α-Al_2O_3whichsequence,however,wasdeterminedbytheinitialNiparticlesize.Basedontheobservednickelleachingandthespecificgrowthcharacteristics;theparticlesizedistributionandtheeffectofloadingonthegrowthrate,Ostwaldripeningissuggestedtobethemainmechanismcontributingtonickelparticlegrowth.Remarkably,initiallysmallerNiparticles(~12nm)supportedonα-Al_2O_3werefoundtooutgrowNiparticleswithinitiallylargersize(~20nm).ItisputforwardthatthehighersusceptibilitywithrespecttooxidationofthesmallerNinanoparticlesanddifferencesininitialparticlesizedistributionareresponsibleforthisbehavior.

简介：IntroductionNanometer-scalecrystallitesofvariousmetalsandnonmetalshaveattractedagreatdealofattentionoverthepastdecade.Forsuchcrystallites,thephysicalandchemicalpropertiesareheavilydependentonparticlesizeandshape,and,asaresult,thesematerialshaveawiderangeofapplications(Ai&Kang,2003).Monodispersefinenickelparticlesarerequiredforhightechnologyapplicationsinalkalinerechargeablebatteries,magneticrecordingmediaandchemicalcatalysts,etc.,suchasconductingandmagneticinks,andferrofluids(Glicksman,1984).Amongthevariousmethodsforsynthesisofultrafinenickelpowdersincludingphysicalmethodssuchasballmilling,pulsedelectrodeposition(PED),thermalplasma,gasdepositionmethods(GDM),γ-radiation(Wangetal.,1988),andchemicalmethodssuchassonochemicaldecomposition(Gaoetal.,2001),chemicalreduction(Illy-Cherreyetal.,2002),microwavehydrothermalmethod(Komamenietal.,1992),mechanochemicalandpolyolprocessing(Baburajetal.,1997;Hegdeetal.,1997),chemicalreductioninanaqueoussolution(Lietal.,1999;Jungetal.,2003;Degen&Macek,1999;Syukrietal.,2003)ischoseninthepresentstudybecauseofeasycontrollingofthesizeandshapeofNinanocrystals.

简介：ThecrystalstructureofNi(Ⅱ)complexwith3-hydroxyl-1,5-diazacycloheptane-N,N’-diacetatewasdeterminedbyX-raydiffractionmethod.CrystaldataforNi2(C9H14N2O5)2·2H2O:monoclinic,spacegroupP21/n,a=1.1717(5),b=0.9794(3),c=1.2971(2)nm,β=96.62(3),V=1.4786(7)nm3,Dc=1.377g/cm3,Z=2,μ=13.321cm-1(Mo-Kα),F(000)=640.ThefinalRandRware0.075and0.089respectively.TheNi(Ⅱ)ionforms2:2complexwithligand.TwoligandsarebridgedbytwoNi(Ⅱ)atomswhicharebridgedbytwoOatoms.EveryNi(Ⅱ)iscoordinatedbytwoNatomsandfour0atoms.ThecoordinationpolyhedronoftheNi(Ⅱ)ionisadistortedoctahedron.

简介：Thispaperdiscussesthemicrostructureofnickel-aluminiumbronzescon-taining（9-10）wt%Aland（0.1～5）wt%Ni,inwhichthreeeutectoidsmayexist.Themorphologiesofα+γ2andα+β’2aresimilarbutthelatterisfiner.Intheα+β’2+γ2eutectoidstructureβ’2ismainlyconcentratedattheα/βboundaries,whileγ2isdistrib-utedinsidepriorBregions.BothK-SandN-Worientationrelationshipsexistbetweenαandβ’2（orγ2）inalloysconsistingofα+β’2orα+γ2.However,ifthealloyconsistsofα+β’2+γ2eutectoid,thelatticesofβ’2andγ2areparallel,bothofthemhavetheN-Worientationrelationshipwithα.

简介：基于镍的复合的层被阳极化在五分钱板上准备在一75?wt%H3PO4答案包含NH4F。这层然后被galvanostatic控告/解除(GCD)对待直到黑外部层被分开，留下象为supercapacitors的没有文件夹的电极材料的镍板上的一部电影。这部电影由Ni组成的微结构描述表演(哦)2和NiO，和没有氟化物在同样获得的电影被发现。电气化学的测试证明这个没有氟化物的电影电极展出954的一个高电容?F圆形的二色性(CD)系列和polyacrylamide胶化电气泳动(页)。当聚合物支架和金属建筑群作为催化活跃中心工作了，BSA服务了。当到BSA的转变金属离子建筑群的有约束力的比率是5:1时，结果证明BSA的结构仍然保持未改变。而且，清除superoxide一？？

简介：Nickelhydroxide,Ni（OH）2iswidelyusedinelectrodesofnickel-basedalkalinesecondarybatteries.UltrathinhexagonalNi（OH）2nanosheetsofspacegroupP-3mlwerehydrothermallypreparedat200℃for10h.Theirdiameterandthicknesswere200-300and3-5nm,respectively.Theirformationwasattributedtotheorientedassemblyofgrowingparticles,whichwasassistedbysurfactantmolecules.ThespecificsurfaceareaoftheNi（OH）2nanosheetswas8.66m2/g.Theirmagnetizationcurveexhibitedlinearparamagneticbehavioracrosstheentiremeasurementregion.

简介：NickeliscommonlycoatedontheouterleadsforT8metalpackage.Theleadselectrodepositedbyconventionaldullorbrightnickelover5μmatdirectcurrentfromWattbatharehardtopassthebendfatiguetestforthreetimes.Nickelelectrodepositedatmultiwaveformcurrentincludingdirectcurrent,singleanddoublepulsefromsulfamatebathcanimprovethebendfatiguestrengthofleads.Suchnickelplatinghasamultilayerstructure,itsmorphologyofsublayerscanbeclearlyseeninitscrosssectionwithSEM.Theelectrochemicalstudyshowsthatthesesublayershavedifferentcorrosionpotentials.ThebendfatiguetestofleadswithsuchplatingforT8metalpackageshowsthatthenumberofbendincreaseswiththedecreaseofaveragecurrentdensityofmultiwaveform,whichcanbeattributedtothereductionofeverysublayerthicknessandtheincreaseoflayernumbersunderthesameconditionoftotalthickness.

简介：ＥｌｅｃｔｒｏｄｅＰｒｏｃｅｓｓｏｆＹ（Ⅲ）ｏｎＮｉｃｋｅｌＥｌｅｃｔｒｏｄｅａｎｄＳｕｒｆａｃｅＭｅｔａｌｌｉｚｉｎｇＺｈｏｕＣｈｕｎｇｅｎ（周春根）（ＵｎｉｖｅｒｓｉｔｙｏｆＡｅｒｏｎａｕｔｉｃｓａｎｄＡｓｔｒｏｎａｕｔｉｃｓＢｅｉｊｉｎｇ，Ｂｅ...

简介：Theapplicationofmicrowavetechniqueinthehydrometallurgyofnickellateriteoreswasdescribed.Themixtureofnickellateriteoresandsulfuricacidwaspre-treatedbymicrowaveirradiation.Thedissolvingofnickelwasconductedinhotwaterattheatmosphericpressure.Theeffectsoffactors,suchasmicrowavepower,microwaveirradiationtime,andsulfuricaciddosage,wereinvestigated.Inmicrowavefield,themigrationofionicspeciesand/orrotationofdipolarspeciespromotetheliquid?solidreactionprocessduetotheincreasedcontactareaofreactantsandleachingreactionrateconstant.Thankstothestrengtheningactionofmicrowave,themicrowave-assistedleachingprocesshasitsadvantages,suchashigherextractingratethanconventionalatmosphericleaching,andnoneedforhigh-pressureoperationashighpressureacidleaching(HPAL).Theferricironinleachingsolutioncouldbeeffectivelyremovedbysodiumjarositeprocesswithalittlelossofnickelinthejarositeprecipitate.

简介：Theadvancedultra-supercriticalpowerplantsofthefuturewillutilizesteampressuresandtemperaturesthataretoohighfortraditionalferriticsteels,thusrequiringausteniticmaterials.Oldernickel-basesuperalloyssuchas263and617wereinitiallyevaluatedundertheEuropeanTHERMIEprojectbeginninginthe1990s.Anentirelynewage-hardenedalloy740whichpossessesexceptionalfiresidecorrosionresistanceandcreepstrengthwasalsodevelopedforboilertubingcapableofservingat700C.Subsequently,interestintheUSAconsideredotherproductformssuchassteamheaderpipingandsteamturbineforgingsforserviceashighas760C.Amorestableandweldablealloyversionnowcalled740Hwasdevelopedtomeetthesemoredemandingconditions.Thispapersummarizesthecurrentstatusofworkonalloys740and740H.

简介：ToseparatethecadmiumandnickelresourcesinwasteNi-Cdbatteries,aself-designedvacuumdistillationrecyclingsystemwasstudiedunderlaboratoryconditions.Theeffectsofsystemtemperature,operatingpressure,andtimeontheseparationofNiandCdwerestudiedrespectively.Themechanismofvacuumthermalrecyclingwasalsodiscussed.ResultsshowthatvacuumdistillationisaveryeffectiveseparationmethodforwasteNi-Cdbatteries.AtaConstantpressure,theincreaseoftemperaturecanimprovetheseparatingefficiencyofCd.Whenthetemperatureis1173K,Cadmiumcanevaporatecompletelyfromthesamplesduring3hat10Pa,ThereductionofpressureinacertainrangeiseffectivetotheseparatingofCdfromNi-Cdbatteriesbyvacuumdistillation.

简介：Anovelprocesswasproposedforrecoveringnickelfromnickeliferouslateriteores.Firstofall,siliconandmagnesiumwereremovedfromlateriticorebyhighconcentrationsodiumhydroxideleachingandcarbonationrespectively,soastoenrichnickel.Thenthemethodofammoniacarbonateleachingwasadoptedtorecovernickelfromthecarbonizedslag,andtheremainingresiduewasusedasarawmaterialforrecoveringiron.Theeffectsoftemperature,ammoniacarbonateconcentration,liquid/solidratioandstirringspeedontherecoveryofnickelwereexamined.Whentheleachedresiduereactedwithammoniacarbonate(6mol·L-1)inaratioofliquid-to-solidof5-1at60℃for150minatthestirringspeedof300r·min-1,approximatemorethan95%nickelwasrecovered.Duringthewholeprocess,therewasnocontaminationproducedandthechemicalrawmaterialswererecycled,thustheprocesswasagreentechnologythathavinggoodsocialbenefit.

简介：Problemsencounteredintheproductionoflownickelausteniticstainlesssteelhavebeenstudied.Theseproblemsprimarilyincludethechangestothemicrostructureoftheslabduringtheheatingprocess,theformationandremovalofdeformation-inducedmartensiteduringcoldrolling,andtheeffectsoftheannealingprocessonthesurfaceoxidestructure.Areasonablemanufacturingprocesshasbeenproposedonthebasisoftheresearchresultsandhighqualitycold-rolledstripsoflownickelausteniticstainlesssteelhavebeenproduced.

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简介：ColdMetalTransfer(CMT)weldingtechniqueisanewweldingtechniqueintroducedbyFroniuscompany.CMTweldingofnickel-basedalloywithstainlesssteelwascarriedoutusingCuSi3fillerwireinthispaper.Effectsofweldingparameters,includingweldingcurrent,weldingspeed,etc,onweldsurfaceappearanceweretested.MicrostructureandmechanicalpropertiesofCMTweldwerestudied.Theresultsshowthatthethicknessofinterfacereactionlayerofthenickel-basedalloyis14.3μm,whichisonly4.33%ofbasematerial.Theweldismadeupoftwophases,α-copperandiron-basedsolidsolution.Ruptureoccursinitiallyattheweldedseamneartheedgeofstainlesssteelinsheartest.ThemaximumshearstrengthoftheCuSi3weldedjointis184.9MPa.

简介：Dendriticgraingrowthattheedgeoftheweldpoolissimulatedusingastochasticnumericalmodelofcellularautomatonalgorithm.Thegraingrowthmodelisestablishedbaseduponthebalanceofsoluteinthesolid/liquidinterfaceofthedendritetip.Consideringthecomplicatednucleationconditionandcompetitivegrowth,thedendritemorphologiesofdifferentnucleationconditionaresimulated.Thesimulatedresultsreproducedthedendritegrainevolutionprocessattheedgeoftheweldpool.Itisindicatedthatthenucleationconditionisanimportantfactorinfluencingthegrainmorphologiesespeciallythemorphologiesofsecondaryandtertiaryarms.

简介：Water-insolublebagassexanthateswerepreparedbyxanthationofalkalifiedcellulosesbytreatingbagassewithchromiumhydroxidereactioneffluent.TheremovelofnickelfrombothtestsolutionsandelectroplatingindustrialwastewatersampleswithBXwasinvestigated.TheprocesswasstudiedtakingintoaccountsuchparametersaspHofwater,precipitationtime,xanthatedosageandstoragetimeofBX.Theseproductswrerfoundtobehighlyefficientinremovingnickel.Theresidualconcentrationofnickelaftertreatmentcanbereducedtoavalueoftheordorof0.01mg·l^-1.

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