简介：GaxIn1-xAs1-ySbyalloyshavebeengrownbyatmosphericpressureMOCVDonn-GaSb（Te-doped）substrate.Thesohdcompositionwasdeterminedbyusingelectronmicroprobe.ThealloysofGalnAsSbwithcompositioninmiscibilitygapweresuccessfullygrown.TheopticalpropertiesofGaxIn1-xAs1-ySbylaverswerecharacterizedbythephotoluminescenceandtheinfraredabsorption.Thespectralresponsesofp+-GaInAsSb/p-GaxIn1-xAs1-ySby/n-GaSbdetectorsshowedwavelengthcutoffat2.4μmanddetectivity-D*=5×108cmHz1/2/Watroomtemperature.

简介：LayeredcathodematerialLiCo1/3Ni1/3Mn1/3O2wassynthesizedbyPechiniprocess,andinvestigatedusingX-raydiffraction(XRD),scanningelectronmicroscopy(SEM)andgalvanostaticcharge/dischargecycling.Thesampleiswell-crystallizedandhasaphase-purea-NaFeO2structure.Theparticlesizesareuniform,anddistributedintherangeof20-200nm.TheinitialdischargecapacityoftheLi/LiCo1/3Ni1/3Mn1/3O2cellwasabout149mAh·g-1whenitwascycledatavoltagerangeof4.5-2.3Vwithaspecificcurrentof0.25mA.Theresultisbetterincomparisonwithsolid-statesolutionmethod.Thesyntheticprocedurewasdiscussed.Threemajorreactions:chelation,esterification,andpolymerizationsuccessivelyoccurred.

简介：EmployingLi2CO3,NiO,Co3O4,andMnCO3powdersasstartingmaterials,Li[Ni1/3Co1/3Mn1/3]O2wassynthesizedbysolid-statereactionmethod.Variousgrindingaidswereappliedduringmillinginordertooptimizethesynthesisprocess.Aftersuccessiveheattreatmentsat650and950℃,thepreparedpowderswerecharacterizedbyX-raydiffraction(XRD)analysis,scanningelectronmicroscopy,andtransmissionelectronmicroscopy.Thepowderspreparedbyaddingsalt(NaCl)asgrindingaidexhibitaclearR3mlayerstructure.ThepowdersbyothergrindingaidslikeheptaneshowsomeimpuritypeaksintheXRDpattern.Theformerpowdersshowauniformparticlesizedistributionoflessthan1μmaveragesizewhilethelattershowsawidedistributionrangingfrom1to10μm.EnergydispersiveX-ray(EDX)analysissshowthattheratioofNi,Co,andMncontentinthepowderisapproximately1/3,1/3,and1/3,respecively.TheEDXdataindicatenoincorporationofsodiumorchlorineintothepowders.Charge-dischargetestsgaveaninitialdischargecapacityof160mAh·g-1forthepowderswithNaCladditionwhile70mAh·g-1forthepowderswithheptane.

简介：前言：环境中的铅作为一种污染物，对人身体有重大危害，在全世界范围内不存在争议。现在ROHS法案即将正式实施，这标志着无铅化时代已经来临。日本是世界工业强国，为了提高竞争门槛，领先于竞争对手，现在已经制定了无卤覆铜板标准。日本企业积极行动，在国内全部采用无卤材料来生产覆铜板。本文介绍了一种同时满足无卤阻燃和适应无铅焊接的FR-1的研制工作。

简介：TheintermetalliccompoundZr1-xTixCowaspreparedanditssuitabilityforhydrogenstoragewasinvestigated.ThealloysobtainedbymagneticlevitationmeltingwiththecompositionofZr1-xTixCo(x=0,0.1,0.2and0.3,at.%)showsinglecubicphasebyX-raydiffraction.Asingleslopingplateauwasobservedoneachisothermal,andpressure-composition-temperature(PCT)measurementresultsshowthattheequilibriumhydrogendesorptionpressureofZr1-xTixCoalloyincreaseswithincreasingTicontent.Thedesorptiontemperaturesforsupplying100kPahydrogenareabout665,642,621and614KforZrCo,Zr0.9Ti0.1Co,Zr0.8Ti0.2CoandZr0.7Ti0.3Coalloy,respectively.RepeatedhydrogenabsorptionanddesorptioncyclesdonotgenerateseparatedZrCo,TiCoandZrH2phases,indicatingthatalloyshavegoodthermalandhydrogenstabilization.

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简介：据《新物流》周刊报道,2003年伊始,华东、东北、中南等地废钢市场价格迅猛上扬。1月上中旬,江、浙、沪鲁钢厂重型废钢采购含税价每吨升至1320-1340元,中型废钢升至1280-1300元,统料废钢升至1180-1200元,与2002年末比统料升幅60-70元,重型和中型废钢上升100-120元。另据宝钢实业公司、

简介：虽然由于应用铜箔制造企业不同，使得所生产出的电解铜箔在性能上各有特色，但制造工艺却基本一致。即以电解铜或具有与电解铜同等纯度的电线废料为原料，将其在硫酸中溶解，制成硫酸铜溶液，以金属辊筒为阴极，通过电解反应连续地在阴极表面电解沉积上金属铜，同时连续地从阴极上剥离，这工艺称为生箔电解工艺。最后从阴极上剥离的一面（光面）就是层压板或印刷线路板表面见到的一面，反面（俗称毛面）就是需要进行一系列表面处理，在印刷线路板中与树脂粘接的一面。

简介：ＶｅｒｔｉｃａｌＧｒａｄｉｅｎｔＦｒｅｅｚｅＧｒｏｗｔｈｏｆＣｄ＿（１－ｘ）Ｚｎ＿ｘＴｅｗｉｔｈＣｄ／ＺｎＲｅｓｅｒｖｏｉｒＨｏｕＱｉｎｇｒｕｎ；ＷａｎｇＪｉｎｙｉ；ＤｅｎｇＪｉｎｃｈｅｎｇ；ＬｉＭｅｉｙｉｎｇａｎｄＴａｏＦｅｎｇ（侯清润）（王金义）...

简介：在二种铝锂alloys2090和2090+Ce的脱臼的微观结构借助于TEM技术被观察。到力量的8''和T_1precipitates的贡献被使用量的金属组织学的结果和微变丑的行为的分析独立计算；三角洲的共同加强的效果“andT_1猛抛被学习。结果证明三角洲共同加强的增加的关系“并且T_1根据1.4以近的山峰条件形成的q=，即，三角洲tau_p~(1.4)=三角洲字形物_(三角洲“)~(1.4)+三角洲字形物_(T_1)~(1.4)；但是增加的关系是近似一种线性关系(q=1)以未成年的条件并且成为抛物线形式什么时候over-aged(q=2)。共同加强的增加的关系三角洲的贡献“并且显然依赖于老化时间的T_1is。

简介：Anewenvironmentalfriendlycatalyst,H4SiW12O40/PAnwaspreparedandidentifiedbymeansofFT-IR,XRDandTG/DTA.Cyclohexanone1,2-propanediolketalwassynthesizedfromcyclohexanoneand1,2-propanediolinthepresenceofH4SiW12O40/PAn.Thefactorsinfluencingthesynthesiswerediscussedandthebestconditionswerefoundout.Theoptimumconditionsare:molarratioofcyclohexanoneto1,2-propanediolis1:1.4,thequantityofcatalystisequalto1.0%offeedstocks,andthereactiontimeis40min.H4SiW12O40/PAnisanexcellentcatalystforsynthesizingcyclohexanone1,2-propanediolketalanditsyieldcanreachover96.5%.

简介：Basedonclustervariationmethod(CVM)andnaturaliterationmethod(NIM),order-disorderphasetransitionintheintercalationcompoundsM1/2TiS2issimulatedbycomputer.Thefavorableconditions,underwhich3a0×a0superstructureisformed,aregiven,andtheresultsareingoodagreementwiththeexperimentsandtheoreticalcalculations.TherelationshipbetweencriticaltemperatureandM-ion-vacancyinteractionparameterislinear.

简介：研究结果表明，1Cr18Ni9Ti不锈钢在pH=1的酸性NaCl溶液介质中浸泡最初期，噪声电流曲线无噪声峰，噪声电阻大，电化学阻抗谱为一容抗弧，阻抗模值大，电极表面处于稳定状态。浸泡24h噪声电流曲线出现尖峰波动，但波动峰值只有几个微安，噪声电阻直线下降，阻抗谱高频部分为一容抗弧，低频下出现感抗特征，阻抗模值大幅度下降表面处于点蚀诱导期的亚稳状态。浸泡48h后，噪声电流波动峰值突然增大至100μA，噪声峰也增多，噪声电阻基本稳定，阻抗谱低频下的感抗成分消失，点蚀进入稳定发展阶段。动电位极化曲线与电化学噪声测试结果表明，1Cr18Ni9Ti不锈钢在pH=1的酸性NaCl溶液介质中的耐点蚀性能随浸泡时问延长而降低。

简介：ThestructureandelectrochemicalpropertiesofanewlowcobalthydrogenstorageelectrodealloysLa1-xLixNi3.2Co0.3Al0.3(0≤x≤0.2)wereinvestigatedwithadifferentadditionsofLiinreplacementofLa.WiththeincreaseofLicontentsthemaximumdischargecapacityincreasesfrom240mAh·g-1(x=0)to328.4mAh·g-1(x=0.1)andthecyclestabilityisimprovedcorrespondingly.ThecapacitydecaycanremaiN28.6%(x=0.2)after230charge/dischargecycles.Thehighratedischarge(HRD)abilityofthealloys(x≤0.1)isimprovedandthebestHRDis34.1%(x=0.1)underthedischargecurrentdensity1200mA·g-1.ItisfoundthatthepreparedalloysarebasicallycomposedofLaNi5asmatrixphaseandLaNi3assecondphase(x≤0.1).ButtheabundanceofLaNi3phasedramaticallydecreaseswithincreasingx.Whenx=0.2,anewphaseAl(NiCo)3isformed.