BS 2S 144-1976 铬-镍-铜-钼耐腐蚀钢(沉淀硬化)方坯、棒材、锻件及零件规范(1130-1330MPa)

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【英文标准名称】:Specificationforchromium-nickel-copper-molybdenumcorrosion-resistingsteel(precipitationhardening)billets,bars,forgingsandparts(1130-1330MPa)
【原文标准名称】:铬-镍-铜-钼耐腐蚀钢(沉淀硬化)方坯、棒材、锻件及零件规范(1130-1330MPa)
【标准号】:BS2S144-1976
【标准状态】:作废
【国别】:
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【发布单位】:英国标准学会(GB-BSI)
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【标准类型】:()
【标准水平】:()
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【英文主题词】:
【摘要】:
【中国标准分类号】:J10
【国际标准分类号】:
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【英文标准名称】:StandardTestMethodforDeterminationofRelativeX-rayDiffractionIntensitiesofFaujasite-TypeZeolite-ContainingMaterials
【原文标准名称】:测定八面沸石型含沸石材料的相对X射线衍射强度的试验方法
【标准号】:ASTMD3906-2003(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D32.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:catalyst;faujasite;X-raydiffraction;zeolite;Faujasitecrystalzeolites;X-raydiffractionanalysis;Zeolitecatalysts
【摘要】:ZeolitesYandX,particularlyforcatalystandadsorbentapplications,areamajorarticleofmanufactureandcommerce.Catalystsandadsorbentscomprisingthesezeolitesinvariousformsplusbinderandothercomponentshavelikewisebecomeimportant.Y-basedcatalystsareusedforfluidcatalyticcracking(FCC)andhydrocrackingofpetroleum,whileX-basedadsorbentsareusedfordesiccation,sulfurcompoundremoval,andairseparation.ThisX-rayprocedureisdesignedtomonitortheseYandXzeolitesandcatalystsandadsorbents,providinganumbermoreorlesscloselyrelatedtopercentzeoliteinthesample.Thisnumberhasprovenusefulintechnology,research,andspecifications.DrasticchangesinintensityofindividualpeaksintheXRDpatternsofYandXcanresultfromchangesofdistributionofelectrondensitywithintheunitcellofthezeolite.Theelectrondensitydistributionisdependentupontheextentoffillingofporesinthezeolitewithguestmolecules,andonthenatureoftheguestmolecules.InthisXRDmethod,theguestmoleculeH2Ocompletelyfillsthepores.IntensitychangesmayalsoresultifsomeorallofthecationsinYandXareexchangedbyothercations.Becauseofthefactorsmentionedin4.3thatcouldvarytheintensitiesoftheXRDpeaks,thisXRDmethodwillprovidethebestdeterminationofrelativecrystallinitywhenthereferenceandsamplehaveasimilarhistoryofpreparationandcomposition.CorrectionsarepossiblethatcanmakethisXRDmethodaccurateformeasuringpercentzeoliteinmanyspecificsituations.ThesecorrectionsarewellknowntothoseskilledinX-raydiffraction.Itisnotpracticaltospecifythosecorrectionshere.1.1ThistestmethodcoversthedeterminationofrelativeX-raydiffractionintensitiesofzeoliteshavingthefaujasitecrystalstructure,includingsyntheticYandXzeolites,theirmodificationssuchasthevariouscationexchangeforms,andthedealuminized,decationated,andultrastableformsofY.Thesezeoliteshavecubicsymmetrywithaunitcellparameterusuallywithinthelimitsof24.2and25.0x02DA;?/span>(2.42and2.50nm).1.2Thesamplesincludezeolitepreparationsinthevariousforms,andcatalystsandadsorbentscontainingthesezeolites.1.3Thetermx201C;intensityofanX-raypowderdiffraction(XRD)peakx201D;isthex201C;integralintensity,x201D;eithertheareaofcountsunderthepeakortheproductofthepeakheightandthepeakwidth.1.4ThistestmethodprovidesanumberthatistheratioofintensityofportionsoftheXRDpatternofthesampletointensityofthecorrespondingportionofthepatternofareferencezeolite,NaY.(LaboratoriesmayuseamodifiedYorX,forexample,REYasasecondarystandard.)Theintensityratio,expressedasapercentage,isthenlabeledx201C;%XRDintensity/NaY.x201D;1.5Undercertainconditionssucharatioisthepercentzeoliteinthesample.Theseconditionsinclude:1.5.1Thezeoliteinthesampleisthesameasthereferencezeolite.1.5.2Theab......
【中国标准分类号】:D52;G74
【国际标准分类号】:71_060_01
【页数】:7P.;A4
【正文语种】:英语


【英文标准名称】:MotorCraft(PleasureandCommercial),FireProtectionfor
【原文标准名称】:机动船(娱乐船及商业船)的防火
【标准号】:ANSI/NFPA302-1980
【标准状态】:作废
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【发布单位】:美国国家标准学会(US-ANSI)
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【标准类型】:()
【标准水平】:()
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