简介：2009年TPCA先进技术研讨会暨标竿论坛于8月6日正式登场，第一场演讲由Prismark姜旭高博士揭开序幕，主题为PCB技术发展趋势与市场商机分析。姜旭高说，比起半导体产业来说，PCB技术发展速度相当缓慢，2000年以来，全球PCB产值几乎没有什么变化，但是台湾PCB厂的产值却大增一倍，在经过这次金融风暴之后，台湾PCB厂展现惊人的生存力，预料未来1-2年内，台湾PCB产业将可跃居全球领先地位。

简介：苏丹1／2／4油田年产原油1000万吨。油田内部集输管线600余km，集输干线100km，连接5个现场处理系统(FPF)和中心处理站(CPF)。优质原油经1500多公里的长输管道到达苏丹港出口。油田设施的设计寿命为25年。较为完善的防腐蚀系统设计覆盖了从井下套管、集输管线、输油干线到采油厂设备的几乎所有设施。本文对油田的防腐蚀系统的全貌进行介绍。

简介：Inthiswork,asimpleandfacileone-potoleylaminesolvothermalsyntheticmethodwasdevelopedtosynthesizeCu_2ZnSnS_4(CZTS)nanocrystals.AndtheCu_2ZnSn(S,Se)_4(CZTSSe)thinfilmswerepreparedbyselenizingCZTSnanocrystals.TheobtainedCZTSnanocrystalsandCZTSSefilmswerestudiedusingX-raydiffraction(XRD),transmissionelectronmicroscopy(TEM),scanningelectronmicroscopy(SEM),energy-dispersiveX-rayspectroscopy(EDX),andultraviolet–visiblespectrophotometer(UV–Vis).TEMresultsshowthatthesphere–likeCZTSnanoparticleswithdiameterbetween12and35nmarepolydispersed.XRDstudiesindicatethatthepreparedCZTSnanocrystalsformkesteritecrystalstructure,andtheCZTSSefilmswithkesteritecrystalstructurearealsoobtainedattheannealingtemperaturesof500and550°C.Inparticularafterannealingat500°Cfor20min,theCZTSSefilmexhibitsasmooth,uniform,crack-free,andlarge-grainedtopographyandpossessesCu-poorandSn-richcomposition.Moreover,itshowsstrongopticalabsorptionfromvisibletonear-infrared(IR)region,anditsopticalbandgap(Eg)isfoundtobeabout1.44eV.

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简介：在H2SO4-Fe2（SO4）3体系中研究载金黄铁矿的浸出动力学,探讨反应温度、Fe3＋浓度、硫酸浓度、搅拌速度等对黄铁矿浸出的影响规律。结果表明：在H2SO4-Fe2（SO4）3体系中,在30~75°C下黄铁矿浸出过程主要受化学反应控制Fe3＋浓度与黄铁矿的浸出呈正相关,通过Arrhenius经验公式求得浸出表观活化能为51.39kJ/mol。EDS与XPS分析结果表明：黄铁矿氧化过程中硫的氧化经一系列中间形态,最终被氧化成硫酸根,并伴有部分元素硫生成,符合硫代硫酸根氧化路径机理。

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：Fe2O3和ZnO的粉末混合物是在一家高精力的行星的球工厂的milled综合ZnFe2O4和X光检查粉末diffractometry被用来获得阶段，雏晶尺寸和Fe2O3和ZnFe2O4的microstrain的相对内容。Fe2O3的格子常数被房间精炼方法获得。macrokinetics和事的结构进化被学习，结果证明ZnFe2O4的mechanochemical合成的动力学过程适合Avrami-Erofe'ev模型并且被成核生长机制，和结构的macrokinetics理论在燃烧合成研究控制区域能被用来也描述运动过程。

简介：2014年1～3月,覆铜板出口量、出口额同比都为负增长,1季度累计同比分别减少7.00%和7.15%,4月同比、环比都改变为正增长,所以1～4月累计同比虽然仍为负增长,但较一季度分别收窄3.48和2.89个百分点。2014年1～3月,覆铜板进口额每月同比都为正增长,1季度累计进口额同比增长6.81%;而进口量1、3月为负增长,2月为正增长,1季度累计进口量同比增长0.34%,

简介：InordertoimprovethehydrogenstoragepropertiesofLiBH_4-MgH_2composite,twodifferentkindsofNb-basedcatalysts,NbCandNbF_5,wereaddedtoLiBH_4-MgH_2compositebyballmilling,andtheeffectofcatalystsonhydrogenstoragepropertiesofthemodifiedLiBH_4-MgH_2systemwasinvestigated.TheexperimentalresultsshowthatLiBH_4-MgH_2compositeisatwo-stepdehydrogenationprocess,andNb-basedcompoundscanremarkablyenhanceitsdehydrogenationkinetics.Forthecompositewithoutadditionofcatalysts,thestartingdecompositiontemperatureforthefirstdehydrogenationstepisaround320℃,andthereisalongperiodofincubationtime(around220min)fortheoccurrenceoftheseconddecompositionstepevenathightemperatureof450℃.Itneedsmorethan10htocompletethedecompositionprocessandreleasearound9wt%H_2.Afteradditionof5mol%NbF_5,thestartingdecompositiontemperatureforthefirstdehydrogenationstepisaround150℃,thereisnoincubationtimefortheseconddecompositionstep,andittakesaround40mintocompletethesecondstepandreachesatotaldehydrogenationcapacityof9.5wt%.NbF_5hasbettercatalyticeffectthanNbC.Basedonthehydrogenation/dehydrogenationbehaviorsandstructuralvariation,themechanismofcatalyticeffectwasdiscussed.

简介：介绍了G4-2油罐浅色防静电防腐涂料所用原料、制备方法和性能测试，着重讨论了成膜物、导静电材料、固化剂对涂料性能的影响。

简介：ThelongafterglowSrAl2O4:Dy,Euphosphorisliabletohydrolyzeinwaterwithdeteriorationoftheluminescentproperty.SrAl2O4:Dy,Euphosphorswerethereforeheatedat60-90℃inTEOSsoltoformasurfacegelandthenheat-treatedat400℃toobtainSiO2coatedphosphors.ObservationbyTransmissionElectronMicroscope(TEM)andX-rayphotoelectronspectroscopy(XPS)showsthatathinsilicafilmformsonthesurfaceofthephosphors.Thecoatingprocedurecanbeillustratedbyafour-stepprocessandthetransparentsilicafilmcansuppressthehydrolysisprocess,sothattheluminescentpropertiesofthephosphorsareunimpairedorevenbetter.

简介：上周金价在达到1260美元上方高点后，出现小幅回调，一度跌破1230美元。有分析人士认为，增加人民币汇率弹性使得人民币兑美元创下新高，而黄金以美元计价，人民币升值对黄金短期利空。

简介：Carbon-coatedlithiummanganesesilicate(Li2MnSiO4/C)nanoparticlesweresynthesizedbypolyolprocess.X-raydiffraction(XRD)patternsoftheobtainedmaterialsexhibitagoodfitwiththatoftheLi2MnSiO4phase.Fieldemissionscanningelectronmicroscopy(FESEM)imagesoftheobtainedsamplesshowthattheparticlesizeisonlytensofnanometers.Thehighresolutiontransmissionelectronmicroscopy(HRTEM)analysisshowsthattheLi2MnSiO4nanoparticlesaresurroundedbyaverythinfilmofamorphouscarbon.Thecompositepreparedthroughpolyolprocessshowsgoodperformanceascathodematerialsinlithiumcellsatroomtemperature.ThechargecapacityoftheLi2MnSiO4/Csamplesis219mAh/g(about1.3Li+perunitformulaextracted),andthedischargecapacityis132mAh/g(about0.8Li+perunitformulainserted)inthefirstcycleinthevoltagerangeof1.5-4.8V.Agoodcapacitycyclingmaintenanceof81.8%after10cycleswasobtained.

简介：Nb-24Ti-18Si-2Al-2Hf-4CrandNb-24Ti-18Si-2Al-2Hf-8Cralloyswerepreparedbyarcmeltinginawater-cooledcrucibleunderargonatmosphere.Microstructuralcharacteristicsandoxidationresistanceofthealloysat1250℃wereinvestigated.Theresultsshowthat,whentheCrcontentis4at%,themicrostructuresconsistof(Nb,Ti)_(ss)andNb_5Si_3;asCrcontentincreasesto8at%,C14LavesphaseCr_2Nbisformed.Theisothermaloxidationtestsshowthattheoxidationkineticsofthetwoalloysfollowsimilarfeatures.Theweightgainsofthetwoalloysafteroxidationat1250℃for100hare235.61and198.50mg·cm~(-2),respectively.Duringoxidation,SiO_2,TiO_2,Nb_2O_5andCrNbO_4areformedatfirst.Then,Ti_2Nb_(10)O_(29)isformedafteroxidationfor20minandbeginstochangeintoTiNb_2O_7astheoxidationproceeds.SiO_2isformedassolidstateatfirstbutlaterevolvesintoglassystatetoimprovethecohesionofthescale.Afteroxidationfor100h,oxidationproductsconsistofSiO_2,TiNb_2O_7,Nb_2O_5andCrNbO_4.

简介：pH价值和Y2Y23-SiO2(Y-Si)泥浆>为Ti-6Al-4V投资扔的脸上衣的O3粉末和硅石大音阶的第五音被测量。Y-Si脸上衣系统做的壳的热行为被微分扫描热量计(DSC)调查，热gravimetric(TG)分析与集体spectrometry(MS)结合了，并且阶段转变被X光检查衍射(XRD)决定。热力量，剩余力量，线性扩大系数，和壳的穿的抵抗性能也被测试。微观结构和相互作用层的元素分发被分别地扫描电子显微镜(SEM)和精力散的分光计(版本)学习。microhardness测试者被申请microhardness。结果证明泥浆为至少60是稳定的?h。YZrO3的很小的数量低于1050被形成?普牯慭?楦汥?桴潥祲?畢?畯?敲?瑬?灡汰?畱污瑩瑡癩汥?潴愠眠摩牥挠慬獳漠?睴?楤敭獮潩慮?楤慬潴?牧癡瑩?桴潥楲獥?潆?慥档琠灹?景猠汯瑵潩獮眠?数晲牯?潨潬牧灡楨?敲潮浲污穩瑡潩?挠浯異吗？？

简介：InordertocontrolthesizeanddistributionofthehighconductiveFe2PinLiFePO4/Fe2Pcomposite,twodifferentcoolingrates(Fast:15℃·min-1,Slow:2℃·min-1)wereemployedaftermechanicalalloying.Thedischargecapacityofthefastcooledwas83mAh·g-1andtheslowcooled121mAh·g-1.TheparticlesizeofthesynthesizedpowderwasexaminedbytransmissionelectronmicroscopyanddistributionofFe2Pwascharacterizedusingscanningelectronmicroscopy(SEM).Inaddition,two-stepheattreatmentwascarriedoutforbetterdistributionofFe2P.X-raydiffraction(XRD)andRietveldrefinementrevealthatLiFePO4/Fe2Pcompositeconsistsof95.77%LiFePO4and4.33%ofFe2P.

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：Aseriesoftheelectrochemicalandlong-termcorrosiontestswascarriedoutina3.5wt%Na2SO4solutiononthermal-sprayedWC-17CoandWC-10Co-4Crcermetcoatingsinordertoexaminetheeffectofcompositionofbindermaterialsonthecorrosionbehavior.TheresultsrevealthattheoverallcorrosionresistanceoftheWC-17CocoatingisinferiortothatoftheWC–Co–CrcoatingsduetothecorrosionofbindermaterialswhichinduceWCparticlestofalloff.CoOandWO3oxidefilmsformonthesurfaceofWC-17CocoatinginNa2SO4solutionelectrochemicalcorrosionprocess,whichwillprotectthecoatingintheprocessofcorrosion.Cr2O3oxidefilmformedontheWC-10Co-4Crcoatingsurfacehasastronghinderedroletocorrosion.ThecorrosionmechanismofWC-17CocoatinginNa2SO4solutionisentirecorrosionofComatrix,whileitisfilm-holecorrosionmechanismforWC-10Co-4Crcoating.

简介：我厂承制了2件材质为9Cr2Mo的矫直机空心辊，单重2800kg，该矫直辊用于某公司管材矫直机设备。管件轧制后表面光洁度和直线度等相对较差，通过矫直，可获得符合要求的轧制管件．该过程对矫直辊表面光洁度、耐磨性、管件的矫直精度等有很高的要求．故矫直辊工作面需要有较高的硬度，且应具有足够的硬化层深度。

简介：WehavecalculatedtheelectronicstructuresofCo2FeAl1-xSix(101)surfaceusingfirst-principlesmethodbasedonthedensityfunctionaltheory.Becauseofthesurfaceeffect,theminorityspinbandgapattheFermileveldisappearsatthesurfaceofbulkCo2FeAl1-xSix.However,beneaththesurface,theminorityspingapopensattheFermilevel,whichindicatesthattheelectronicstructuresofCo2FeAl1-xSix(101)be-comeclosetothatofbulkphase.Accordingly,theCo2FeAl1-xSix(101)surfaceisacompositetri-layerstructurethatcorrespondstotheweakeningofhalf-metallicpropertyinCo2FeAl1-xSixfilms.Eventhough,thespinpolarizationofCo2FeAl1-xSix(101)surfaceisstilllargerthanthatofCo2FeAlorCo2FeSimaterials,makingCo2FeAl1-xSixapromisingspintronicsmaterial.