简介：PolycrystallinesamplesofLa12x(Sr12yAgy)xMnO3(y=0.0,0.2,0.4,0.6,1.0)werepreparedbythesolid-statereactionmethod.ThetemperaturestabilityofmagnetoresistanceandmagnetoresistanceenhancementinLa1-x(Sr1-yAgy)xMnO3systemwithbothunivalentandbivalentelementsdopedatAsiteandwithunchangedvalueofMn3+/Mn4+ratiowereexploredthroughthemeasurementsofX-raydiffractionpatterns,magnetiza-tion-temperature(M-T)curves,resistivity-temperature(q-T)curvesandmagnetoresistance-temperature(MR-T)curves.Theresultsareasfollows:therearetwopeaksintheq-TcurvesofthesampleswithAgdoping,oneiscausedbyresistancechangeduringtheparamagnetism-ferromagnetismtransition,andtheotherisfromboundary-dependentscatteringofconductionelectronsontheboundariesofgrains.ThepeakvalueofMRincreaseswithincreasingAgdopingcontent,anditincreasesfrom8.2%fory=0.2to29.6%fory=1.0underthemagneticfieldofB=0.8T;MRremainsaconstantof12%inthetemperaturerangeof218-168Kforthesamplewithy=1.0,andthetemperaturestabilityofMRisinfavorofthepracticalapplicationofMR.

简介：Thechemicalandelectrochemicalequilibriainthepresenceofgaseousphasewereinvestigated.Manysubstances,whichconsistedofsulphurandchromium,wereconsidered.Variousthermodynamicequilibriawerecalculatedindifferentpressures.Calculationresultswereshownaslogp―1/TandE―Tdiagrams.Thesediagramsmaybeusedtostudythecorrosionofchromiuminsulphur-containingcircumstances.Thediagramsarealsousedtothermodynami-callydeterminetheexistenceareaofvarioussubstancesandsoon.

简介：１ＱｕａｓｉｐａｒａｂｏｌｏｉｄＲｕｌｅＢａｓｅｄｏｎｔｈｅｐｒｉｎｃｉｐｌｅｔｈａｔｔｈｅｍｏｌａｒＧｉｂｂｓｆｒｅｅｅｎｅｒｇｙｆｕｎｃｔｉｏｎｉｓｔｏｗａｒｄｓａｍｉｎｉｍｕｍｗｈｅｎａｐｈａｓｅｉｓｓｔａｂｌｅ，ａｇｅｎｅｒａｌｒｅｌａ...

简介：Byuseofmicro-DTAtechniqueaswellasambientandhightemperatureX-rayanalysisthephasediagramofNaCl-CaCl2hasbeenchecked.Itis.asimpleeutecticsystemwithasolidsolubilityinthesodiumchlorideside.Theeutecticpointisat773K,49mol%NaCl.Theexperimentalresults,especiallythoseoftheX-raydiffractionstudieshaveshowedthattheincongruentcompound4NaCl-CaCl2doesnotexistintheNaCl-CaCl2system.

简介：以便获得对Mg-Ga二进制系统的热力学的描述，对系统的热力学的评价通过Thermo计算用CALPHAD方法被执行？软件包裹基于从出版文学的所有可得到的试验性的数据的评估。答案阶段包括液体，hcp(Mg)并且斜方晶(Ga)，被代理答案模型，过量吉布斯精力与Redlich-Kister多项式被表示描述。同时，所有金属间化合的混合物，Mg5Ga2，Mg2Ga，MgGa，MgGa2和Mg2Ga5，作为stoichiometric混合物被建模。在Mg-Ga二进制系统提出各种各样的阶段的吉布斯精力的一套前後一致的热力学的参数最后被获得。好一些的协议在计算结果和报导试验性的数据之间被完成。

简介：ＥｎｔｈａｌｐｙｏｆＲｅａｃｔｉｏｎｓｉｎＹ－Ｂａ－Ｃｕ－ＯＳｙｓｔｅｍＳｈａＷｅｉ沙维（Ｄｅｐａｒｔｍｅｎｔｏｆ．ＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＭｅｔａｌｌｕｒｇｙ，ＵｎｉｖｅｒｓｉｔｙｏｆＣａｍｂｒｉｄｇｅ．Ｕ．Ｋ．）Ｒｅｃｅｉｖｅｄ１７...

简介：ＰｈａｓｅＥｑｕｉｌｉｂｒｉａＣａｌｃｕｌａｔｉｏｎｏｆｔｈｅＧａＩｎＳｂＴｅｒｎａｒｙＳｙｓｔｅｍＸｉｅＹｕｎ′ａｎ，ＱｉａｏＺｈｉｙｕ，ＸｉｎｇＸｉａｎｒａｎａｎｄＷａｎｇＣｏｎｇ（谢允安）（乔芝郁）（邢献然）（王聪）Ｄｅｐｔ．ｏｆＰｈｙｓ...

简介：ＳｔｕｄｙｏｎＧｄＡｌＤｙＳｙｓｔｅｍＭａｇｎｅｔｉｃＲｅｆｒｉｇｅｒａｔｉｏｎＭａｔｅｒｉａｌｓＣｈａｎｇＸｉｕｍｉｎ，ＹａｎＪｕｎｌｉａｎ（常秀敏）（闫俊联）ＢｅｉｊｉｎｇＧｅｎｅｒａｌＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｆｏｒＮｏｎｆｅｒｒ...

简介：Recoveryprocessesofsecondaryresourcesusuallyencounterproblemsbecauseofthediversecompositionsofwastes.Toenhancetheapplicabilityoftraditionalhydrometallurgicalprocesstowardsecondaryresources,theadjustmentofcomponentsisnecessary.Intraditionalhydrometallurgicalseparation,precipitationandcomplexationareextensivelyused.However,theircombinationasaspecificmetalseparationmethodhasnotyetbeenstudiedindetail.Thisapproachisverypromisingforsolvingproblemscausedbychangeablecomponentsduringrecyclingprocessesofsecondaryresources.Thispaperreviewstheeffectsofprecipitationandcomplexationinmetalseparationprocesses,andametalseparationmethodsystemof‘‘complexation–precipitation’’developedtoadjustthecomponentsofsecondaryresourcesisintroduced.

简介：ThermodynamicmodelsofcalculatingmassactionconcentrationsforstructuralunitsorioncouplesinRbCl-H2ObinaryandRbCl-RbNO3-H2Oternarystrongelectrolyteaqueoussolutionsweredevelopedbasedontheionandmoleculecoexistencetheoryat298.15K.Atransformationcoefficientisneededtocomparethecalculatedmassactionconcentrationandthereportedactivitybecausetheyareobtainedatdifferentstandardstatesandconcentrationunits.TheresultsshowthatthetransformationcoefficientsbetweenthecalculatedmassactionconcentrationsandthereportedactivitiesofthesamestructuralunitsorioncouplesinRbCl-H2ObinaryandRbCl-RbNO3-H2Oternarystrongelectrolyteaqueoussolutionschangeinaverynarrowrange.ThetransformedmassactionconcentrationsofstructuralunitsorioncouplesinRbCl-H2Obinarysystemareingoodagreementwiththereportedactivities.ThetransformedmassactionconcentrationsofRbClandRbNO3inRbCl-RbNO3-H2Oternarysolutionarealsoingoodagreementwiththereportedactivities,aRbCland3RbNOa,withdifferenttotalionicstrengthsas0.01,0.05,0.1,0.5,1.0,1.5,2.0,3.0and3.5mol/kg,respectively.AllthoseresultsmeanthedevelopedthermodynamicmodelofstrongelectrolyteaqueoussolutionscanreflectstructuralcharacteristicsofRbCl-H2ObinaryandRbCl-RbNO3-H2Oternarystrongelectrolyteaqueoussolutionsandthemassactionconcentrationalsostrictlyfollowsthemassactionlaw.

简介：作为La-Mg-Y系统的一个例子，方法怎么建立单个阶段的热力学的模型在热力学的优化的过程被介绍。答案阶段(液体，以身体为中心立方，以脸为中心立方、包装hexagonalclose、双六角形拥挤不堪)与Redlich-Kister方程被建模。Thecompound精力模型被用来在La-Mg-Y系统描述金属间化合的混合物的热力学的函数。在La-Mg-Y系统的混合物Mg_2Y，Mg_(24)Y_5，Mg_(12)La，Mg_(17)La_2，Mg_(41)La_5，Mg_3La和Mg_2La被当作公式(Mg，Y)_2(La，Mg，Y)，Mg_(24)(La，Mg，Y)_4Y，Mg_(12)(La，Y)，Mg_(17)(La，Y)_2，Mg_(41)(La，Y)_5，Mg_3(La，Mg，Y)并且Mg_2(La，Y)分别地。一个模型(La，Mg，Y)_(0.5)(La，Mg，Y)_(0.5)被使用由MgLa和MgY描述复合MgMformed以便在La-Mg-Y系统与CsCl类型结构(B2)应付在body-centeredcubic答案(A2)和MgM之间的顺序混乱转变。单个阶段的吉布斯精力在La-Mg被优化，躺并且由CALPHAD的La-Mg-Y系统技术。液体的Theprojection我们为La-Mg-Y系统的表面被预言。包括Mg，艾尔，Cu，Ni，Mn，Zn和稀土元素形成的36二进制代码和15三元系统的基于Mg的合金数据库元素在SGTE被安装标准。

简介：ThemicrostructuresandVickershardnessatroomtemperatureofarc-meltingprocessedintermetallicsofMo5Si3-MoSi2hypoeutecticalloyandhypereutecticalloyannealedat1200℃fordifferenttimewereinvestigated.LamellarstructureconsistedofMo5Si3(D8m)phaseandMoSi2(C11b)phasewasobservedinallthealloys.ForMo5Si3-MoSi2hypoeutecticalloy,thelamellarstructurewasfoundonlyafterannealinganddevelopedwellwithfinespacingontheorderofhundrednanometersafterannealingat1200℃for48h.Butwhentheannealingtimewasupto96h,thewell-developedlamellarstructurewasdestroyed.ForMo5Si3-MoSi2hypereutecticalloy,thelamellarstructurewasfoundbothbeforeandafterannealing.Howeverthevolumefractionandspacingofthelamellarstructuredidnotchangesignificantlybeforeandafterannealing.Theeffectsoftheformation,developmentanddestructionoflamellarstructureonVickershardnessofalloyswerealsoinvestigated.WhenMo5Si3-MoSi2hypoeutecticalloyannealedat1200℃for48h,theVickershardnesswasimprovedabout19%comparedwiththatwithoutannealingandformationoflamellarstructure.ThehighestVickershardnessofMo5Si3-MoSi2hypereutecticwasincreasingabout18%whenannealingat1200℃for48h.

简介：在由一般解决方案模型的第三的Au-Ga-Sb系统的热力学的性质的计算结果在这份报纸被介绍。计算在9731,573的温度范围从所有三个角落在九生气的节被执行?为所有部件的K，和不可分的臼齿的过量吉布斯精力，部分臼齿的吉布斯精力，活动系数和活动被获得。黄金和镓的活动为所有调查的节从Raults法律显示出否定偏差，当锑活动接近理想的条件的线并且甚至在合金为锑的高内容与线与一致时。计算获得的数据与在文学发现的那些相比。比较价值显示出合理好同意，这被结束。

简介：Micro-arcoxidation(MAO)processwascarriedoutinanoptimizeddualelectrolytesystemtofabricateacompact,smooth,andcorrosionresistantcoatingonZK60Mgalloy.Themicrostructuralcharacteristicsofcoatingwereinvestigatedbyscanningelectronmicroscopy(SEM)coupledwithanenergydispersivespectrometer(EDS)andX-raydiffraction(XRD).Testofmasslosswasconductedata3.5%NaClsolutiontoassesstheresistancetocorrosion.ThebondingstrengthbetweenthecoatingandZK60substratewasevaluatedusingscratchexperiment.TheresultsrevealthatMgAl2O4andMgOarethemainphasesofceramiccoatingobtainedinthedualelectrolytesystem.Thecorrosionrateofcoatingpreparedintheoptimizeddualelectrolyteisonly0.0061gám-2áh-1,whichdemonstratesexcellentcorrosionresistance.Thisismainlyduetothecompact,uniformcoatingwithhighbondingstrength.

简介：8月4日，记者从国家环境保护部环境规划院获悉，财政部、国税总局和环保部将向国务院提交环境税开征及试点的请示。

简介：2009年8月20日，中国有色金属工业协会组织专家对中国有色集团出资企业沈阳有色金属研究院（简称沈阳研究院）完成的“SK9011浮选药剂研制及在金、铜等硫化矿选矿中的应用”科技成果进行了鉴定，一致认为该项目首次把捕收剂、调整剂、起泡剂和溶剂调配在一起，产品填补了国内外空白，整体技术达到国际先进水平。

简介：2009年12月24日，国务院正式批复了《甘肃省循环经济总体规划》（以下简称《总体规划》），这是我国第一个由国家批复的区域循环经济发展规划，实现了循环经济由理论到实践的重大突破。

简介：8月1日,国务院印发了《关于加快发展节能环保产业的意见》（以下简称《意见》）,提出了近期三年发展目标。这是新一届政府统筹稳增长、调结构、促改革、惠民生的又一重大举措。《意见》明确了当前促进节能环保产业加快发展的四项重点任务。一是围绕重点领域,促进节能环保产业发展水平的全面提升。加快发展节能、环保、资源循环利用技术装备,提高技术水平;创新发展模式,壮大节能环保服务业。二是发挥政府带动作用,引领社会资金

简介：中共中央、国务院近日印发了《关于深化国有企业改革的指导意见》（以下简称“指导意见》）.这是新时期指导和推进国有企业改革的纲领性文件，必将开启国有企业发展的新篇章。《指导意见》提出，国有企业属于全民所有，是推进国家现代化、保障人民共同利益的重要力量，是我们党和国家事业发展的重要物质基础和政治基础。

简介：InordertoimprovetheelectrochemicalcyclestabilityofLa-Mg-Nisystem(PuNi3-type)hydrogenstoragealloy,NiinthealloyswaspartiallysubstitutedbyM(M=Cu,Al,Mn).AnewLa-Mg-NisystemelectrodealloysLa0.7Mg0.3Ni2.55-xCo0.45Mx(M=Cu,Al,Mn;x=0,0.1)werepreparedbycastingandrapidquenching.Theeffectsofelementsubstitutionandrapidquenchingonthemicrostructuresandelectrochemicalperformancesofthealloyswereinvestigated.TheresultsbyXRD,SEMandTEMshowthatthealloyshaveamultiphasestructure,includingthe(La,Mg)Ni3phase,theLaNi5phaseandtheLaNi2phase.Therapidquenchingandelementsubstitutionhaveanimperceptibleinfluenceonthephasecompositionsofthealloys,butbothchangethephaseabundanceofthealloys.Therapidquenchingsignificantlyimprovesthecompositionhomogeneityofthealloysandmarkedlydecreasesthegrainsizeofthealloys.TheCusubstitutionpromotestheformationofanamorphousphaseintheas-quenchedalloy,andareversalresultbytheAlsubstitution.Theelectrochemicalmeasurementindicatesthattheelementsubstitutiondecreasesthedischargecapacityofthealloys,whereasitobviouslyimprovesthecyclestabilityofthealloys.ThepositiveinfluenceofelementsubstitutiononthecyclelifeofthealloysisinsequenceAl＞Cu＞Mn,andnegativeinfluenceonthedischargecapacityisinsequenceAl＞Mn＞Cu.Therapidquenchingsignificantlyenhancesthecyclestabilityofthealloys,butitleadstoadifferentextentdecreaseofthedischargecapacityofthealloys.