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:高温潮湿环境中钢与3LPE/3LPP防腐层之间的黏结持久性研究10001StudiesontheBondDurabilityBetweentheSteeland3LayersPE/PPCoatingsinHot/WetEnvironment(作者DenisMelot矾数15)某石油企业近年已经进行了大量实验室试验,模拟现场高温潮湿环境中钢管底材上三层聚乙烯和三层聚丙烯防腐层的剥离(但没有发生腐蚀)以探讨3LPE/3LPP防腐层的剥离机理。本问总结了这项研究成果,重点关注:(1)钢管底材与熔结环氧粉末FBE底漆之间的黏结持久性及水扩散的影响;(2)熔结环氧粉末FBE类型与老化温度对剥离的影响;(3)内部应力对三层防腐层剥离的影响。
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.