简介：ThispaperpresentstheeffectofmineralizationonchalcopyritechemicalleachinginverysimpleH2SO4solutionsystemsatpH1.0,with5%chalcopyriteconcentrateat65℃.Thecopperextractionsafter12daysleachingofmarinevolcanicandporphyrychalcopyritewere85.7and66.6%,respectively.ItwasfoundthatsulphurelementformedonthesurfaceoftwosamplesasaresultofXRDandSEM-EDAX,whichwasveryporousthatdidnotinhibitchemicalleachingreaction.Meanwhile,(Cu,Fe)12As4S13formedonthesurfaceofporphyrytypechalcopyrite,whichmaycauselowleachingratioofporphyrytypechalcopyriteaspassivation.(Cu,Fe)12As4S13maybeonekindofthepolysulphidecompounds.

简介：macroporous的吸着性质为La3+离子的弱酸树脂(D113)被化学分析和红外系列学习。试验性的结果显示D113树脂在pH=为La3+有一个好吸附能力6.0在HAc-NaAc媒介。静态地浸透的吸附能力是273.3mg/g。La3+/Ce3+，La3+/Gd3+，La3+/Er3+，和La3+/Y3+的分离系数分别地是2.29，3.64，4.27，和0.627。吸附的明显的激活精力，Ea是吸着的18.4kJ/mol，热力学参数H，S，和G是4.53kJ/mol，61.8J/(mol.K)，?13.9kJ/mol分别地。为La3+的D113的吸附行为服从Freundlich等温线。在树脂上吸附的La3+能是由2.0mol/LHCl份量上的eluted。

简介：Themultilayered7XXXseriesaluminumalloywasimpactedby7.62mmogivalprojectilesatvelocitiesrangingfrom787to851m·s~(-1).Thedeformedmicrostructureundervariousimpactingvelocitiesandfracturesurfacesofdifferentsectionswereinvestigatedatdifferentphysicalscalestodeterminetheprocessoffailure.Opticalmicroscopy(OM),electronback-scattereddiffraction(EBSD)andscanningelectronmicroscopy(SEM)wereusedintheinvestigation.Theresultsshowthatcraterisconstrainedinthe7B52frontlayerandtwotypesofadiabaticshearbandswhicharetransformedbandsanddeformedbandsanddifferenttypesofcracksareobserved.Spallfractureisthesignificantfailuremodeof7B52frontlayer,andtheresultingdelaminationleadstothepresenceofbendingtensilefractureinsteadoftheshearplugging.Theductile7A01layerbluntsanddeflectsthespallcracktips,preventingthetargetsfromfullspall,andinducesaconstraintof7A52rearlayer.Theleveloftheconstraintdeterminesdifferentfracturemodesof7A52layer,accountingfortheasymmetryofdamage.

简介：Theflotabilityandmechanismofthecompositetantalite-niobitemineralswhichhavedifferentcontentoftheTa,Nb.Fe,Mnwithstyrenephosphonicacid（SPA）ascollectorareinvestigatedanddiscussed.Someimportantflotationparametersarefoundasfollows:SPAisabettercollectorforflotatingniobite-tantalitemineralthanother,theoptimumpHvalueinpulpislessthan5,theflotabilityofthosemineralsvarieswiththedifferentcontentofmineralcomposition,theflotabitityofthemineralswithhigherNb2O5contentisbetterthanthatwithhigherTa205content.HereweemphasizethatinwiderangeofpHinsolu-tiontheFe,Mnonthemineralsurfacesarethemainactivespeciesforflotationoftheseminerals.Inadditiontothis,someofre-searchworkbyusingAugerelectronspectroscopy,infraredspectroscopyandultravioletspectroscopyfordeterminingthesurfaceconditions,pretreatedbyacidornot,hasbeendone.ThecharacteristicsofadsorptionofSPAonthemineralsurfacesareexam-inedanddiscussed.ItisindicatedthattheSPAinteractswithFe,Mnionsonmineralsurfacesbythechemicalbondforce.Butonthewholeouterlayerofcollector,whichisnon-uniformmultilayer,itmaybesaidthattheadsorptionofSPAonthemineralsur-faceisbothchemico-adsorptionandphysico-adsorption,butthechemico-adsorptionispredominant.

简介：Al-5Ti-0.5C-8Sr(集体部分，%)主人合金用一个melt反应方法被准备。微观结构和主人合金的合成过程被光显微镜学，X光检查衍射，扫描电子显微镜学和X光检查调查精力散的光谱。结果证明主人合金由组成一(艾尔)，TiAl3，TiC，Al4Sr和Al-Ti-Sr分阶段执行。主人合金的合成机制如下：TiAl3通过在K2TiF6和艾尔之间的反应被形成在基础材料的部分融化层融化在850个C粒子与同类地分布式的加强在超声的行动和一张契约下面被变成液体filler在团结以后被获得。体积部分原文如此，在契约的粒子能被改变以铜锌金焊接的温度改变。最大值原文如此，契约材料的粒子体积部分在brazi到达了37%？

简介：

简介：ByaddingmixtureofZrO2andcarbon,aZr-enhancedcompositecoatingwasproducedontoanAISI1045substratebylasercladding.Themicrostructureandphaseformation,microhardnessandwearresistanceofthecompositecoatingwerestudied.Theexperimentalresultsindicatethatthecompositecoatingwithmetallurgicalbondingtosubstrateconsistsof7-Ni,massiveceramicparticlesofZrC,NiZra,NiTZr〉（Fe,Ni）23C6andF%C.Theinsitu-synthesizedZrCparticlesareuniformlydispersedincompositecoating,whichrefinesthemicrostructureofcompositecoating.WithdifferentZrO2andcarbonaddi-tions,thepropertiesareimproveddifferently.Finally,thefineinsituZrCparticlesimprovethemicrohardnessofcompositecoatingtoHVo.2650,whichisnearly2.7timesthatofNi25coating.Also,thecompositecoatinghasanadvantageinwearresistance;itoffersbetterwearresis-tancewhenmoremixtureofZrO2andcarbonwasaddedinnickelalloys.

简介：Thecreepmechanismofas-castMg-6Al-6Ndalloywasstudied.Thestressexponentforcreepis5.8undertheappliedstressesof50-70MPaat175°C.Theactivationenergyforcreepis189kJ·mol-1undertheappliedstressof70MPaintherangeof150-200°C.Thetruestressexponentandthresholdstressforcreeparecalculatedas4.96and10.2MPa,respectively.Thetruestressexponentindicatesthatitscreepmechanismbelongstothedislocationclimb-controlledcreep,whichisinagreementwiththemicrostructurechangesbeforeandaftercreep.ThehighvalueforstressexponentisattributedtotheinteractionofAl11Nd3phasewithdislocations.Theactivationenergyismorethantheself-diffusionactivationenergyofMg,whichisattributedtotheloadtransfertakingplacefromthematrixtoAl11Nd3phaseduringcreep.

简介：Nb-bearingslagfromBaotouhotmetalwaschlorinatedinthesolidstatewithmoltenCaCl2undervacuum,96～98%MnOorFeObeingthusvolatilized.Byreducingthechloridizedresidueunderadditionofflux,ferroniobiumwithabout60%Nbwassuccessfullymade.KineticstudyofchlorinationofsyntheticMnO-Nb2O5-SiO2andFeO-Nb2O5-SiO2slagsystemswasconducted,andanon-reactingcoremodelforthedemanganificationwithfreeuseofactivitywasformulatedandtherate-controllingstepwasexplained.

简介：Anovelstar-likesingle-crystalZnOstructurewassynthesizedbyasimplesolvothermalmethod.Theas-preparedproductswerecharacterizedbyXRD,SEMandTEM.Thestar-likeZnO,whichshowssixfoldsymmetry,wasconstructedbysixuniformarmsdistributingsymmetricallyaroundthe[0001]zoneaxis.Itisalsofoundthatthearmsarenotperpendiculartothe[0001]zoneaxisandeacharmisgrownatacertainanglewiththe[0001]direction.CBEDpatternandcorrespondingsimulationdemonstratethattheconvexpartofthestar-likeZnOisO-terminated(000-1)planeandtheconcavepartisZn-terminated(0001)plane.H2Splaysacrucialroleinthesynthesisprocess.Theanisotropicgrowthhabitalong[0001]and[000-1]resultsintheformationofstar-likestructure.

简介：扔的near-liquidus准备的6061件半固体铝合金化工物品借助于Gleeble-3500热机械的模拟器处于半固体状态被压缩。在在不同温度和紧张率的真压力和真紧张之间的关系与70%的变丑度被学习。微观结构在变丑过程期间被描绘。半固体合金的变丑机制和形成thixo性质被分析。结果证明同类并且6061Al合金由扔技术的near-liquidus生产了的半固体的非树突微观结构能与对与通过再热的最容易溶解的作文在球形附近的谷物和液体阶段镇静的形成thixo合适的微观结构被转变成半固体状态过程。变丑温度和紧张率显著地影响山峰压力而非稳定流动应力。到处于半固体状态的变丑的抵抗随变丑温度的增加和紧张率的减少减少。在稳定的thixotropic变丑舞台，thixotropic性质是一致的，并且主要变丑机制是在稳固的粒子和稳固的粒子的塑料变丑之间旋转或滑动。

简介：ThecoercivitymechanismofNd-Fe-Bbasedmagnetspreparedbyanewtechniqueofstripcastingwasinvestigated.Differentfromthetraditionalmagnets,α-FephasesaredifficulttobefoundinNd-Fe-Bmagnetspreparedbystripcasting.Meanwhile,therich-Ndphasesoccurnotonlynearthegrainboundariesofmainphases,butalsowithinthemain-phasegrains.Investigationonthemagnetizingfielddependenceofthecoercivityforthe(Nd0.935Dy0.065)14.5Fe79.4B6.1magnetandthetemperaturedependenceofthecoercivityfortheNd14.5Fe79.4B6.1magnethavebeendone.Resultsshowthatcoercivitiesforstripcastingmagnetsarecontrolledbythenucleationmechanism.

简介：ＥｌｅｃｔｒｏｃｒｙｓｔａｌｌｉｚａｔｉｏｎＭｅｃｈａｎｉｓｍｏｆＴｕｎｇｓｔｅｎｉｎＭｏｌｔｅｎＫＦ－Ｂ＿２Ｏ＿３－Ｋ＿２ＷＯ＿４ＷｅｎＺｈｅｎｈｕａｎａｎｄＬｉＧｕｏｘｕｎ文振环，李国勋（ＧｅｎｅｒａｌＲｅｓｅａｒｃｈＩｎｓｔｉｉｕｔｅｆｏｒＮｏ...

简介：2010年3月29日海关总署发布《关于对重点固体废物实施分类装运管理》的公告，自2010年6月1日起，对废金属、废塑料、废纸（以下简称“重点固体废物”）进口实施分类装运管理。该新规对重点固体废物进口的运输装载形式作了较为明确规定，没有按规定实行分类装运的进口重点固体废物将无法顺利通关。

简介：TheeffectofyttriaonthesolidreactionmechanismofaCaHPO4·2H2O+CaCO3systematdifferenttemperatureswasexperimentallystud-ied.Thesampleswithandwithoutyttriaweresubjectedtothermogravimetric/differentialscanningcalorimetrymeasurement.ThesampleswereheattreatedatthetemperaturescorrespondingtothepeaksontheDSCspectra,andtheresultedphasecompositionswereidentifiedbyX-raydiffraction.Thetransformationmechanismwasdeducedbycomparingthephasesobtainedatdifferenttemperatures.Theresultsshowthatthetransformationsatbelow1073Karenotaffectedbyyttria,butallthoseatabove1073Karecompletelyaltered.Theformationtem-peratureofhydroxyapatitedecreasesby134K,andthedecompositiontemperatureincreasesby38K.ThepolymorphoustransformationofCa3(PO4)2fromβphasetoαphaseincreasesby47K.Thethermodynamicpropertiesofthetransformationsatabove1073Karealsomodi-fiedbytheadditionofyttria;thatis,theendothermalpeaksaresubstitutedbyexothermalpeaks.

简介：　　由中国制浆造纸研究院负责起草的即将出台.新的废纸回收分类标准从我国废纸回收利用的实际出发,将国内废纸大致分为废报纸、废牛皮纸、废包装纸板等11类,此分类基本囊括了当前造纸企业所利用的各种废纸类型.同时还对再生的新纸类别、所使用的每类废纸进行了明确规定.新标准的出台意味着我国对废纸回收将有标准化、系统化的管理分类机制,同时我国由回收废纸产生的再生纸发展将有望摆脱目前尴尬的局面.……

简介：TheeffectsoftheintroductionofCetoLa_(1-x)Ce_xFe_(11.5)Si_(1.5)alloyson1:13phaseformationmechanism,thefirst-ordermagneticphasetransitionstrengtheningcharacteristics,andmagnetocaloricpropertywerestudied,respectively.Theresultsshowthattheformationmechanismsof1:13andLaFeSiphasesinLa_(1-x)Ce_xFe_(11.5)Si_(1.5)alloysarethesameasthoseofCe_2Fe_(17)andCeFe_2phasesinCe–Febinarysystem,respectively.ThesubstitutionofCein1:13phasewhichislimitedcanmakethefirst-ordermagneticphasetransitioncharacteristicsstrengthen,whichcanmakethermalandmagnetichysteresisincrease,thetemperatureintervaloftemperatureinducedphasetransitiondecrease,andthecriticalmagneticfieldoffield-inducedmagneticphasetransition(HC)increase,respectively.Owingtothelatticeshrinkof1:13phasewiththeincreaseinCecontent,theCurietemperatures(TC)showalineardecrease.Themaximumchangeinmagneticentropygraduallyincreasesduetothedecreaseintemperatureintervaloftemperature-inducedphasetransition,buttherelativecoolingcapacitiesareallabout80Jákg-1atmagneticfieldof2T.

简介：“既是挂历，又是学习垃圾分类的好教材，真不错。”从12月14日起，由北京市东城区垃圾分类工作领导小组精心设计制作的“参与垃圾分类、建设绿色东城”挂历将陆续发到126个社区的4万户参与垃圾分类的居民家中。

简介：Inthisstudy,C_f/AlcompositesandTiAlalloyswerejoinedbyanewmethodnamedlaser-ignitedselfpropagatingsynthesis(SHS).Mixedpowdersof63.0Ni-31.9Al-5.1Ti(wt%)wereusedasjoininginterlayer.Perfectjointwasgot.ThemicrostructureevolutionandformationmechanismoftheSHSjointwereinvestigatedbyscanningelectronmicroscopy(SEM),energy-dispersivespectroscopy(EDS)andX-raydiffraction(XRD).Resultsshowthatlocalizedmeltingoccursonbothsides.Oneγ-Ni_(0.35)Al_(0.30)Ti_(0.35)andtwoNi-Alreactionlayersform,respectively,intheTiAl/interlayerandC_f/Al/interlayerinterfaces.ThecombustionofNi-Al-TiinterlayerbeginswiththesharpreactionofNiandAl.TheinterlayerproductisaeutecticorganizationofNiAlandAl-richγ.

简介：做Al的LiVPO4F阴极材料LiAlxV1-xPO4F被反应基于carbothermal减小(CTR)处理的二拍子的圆舞准备。做Al的LiVPO4F的性质被X光检查衍射(XRD)调查，扫描电子显微镜学(SEM)，和电气化学的大小。XRD研究证明做Al的LiVPO4F有象undopedLiVPO4F的一样的三斜晶系的结构(空间组p1)。做Al的LiVPO4F的粒子尺寸比undopedLiVPO4F的小并且最小的粒子尺寸仅仅是大约1m的SEM图象展览。做Al的LiVPO4F为第二等的锂电池作为阴极材料被评估，并且展出了改进可逆性和cycleability，它可以被稳定三斜晶系的结构归因于Al3+离子的增加。