【英文标准名称】:IEClampcaps;lampcapX511onfinishedlamps
【原文标准名称】:IEC灯头.成品灯上的灯头X511
【标准号】:DIN49640T.1-1982
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
【页数】:
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【英文标准名称】:StandardTestMethodforThermalConductivityofSolidsbyMeansoftheGuarded-Comparative-LongitudinalHeatFlowTechnique
【原文标准名称】:通过隔绝-比较-轴向热流技术测定固体导热性的标准试验方法
【标准号】:ASTME1225-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E37.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:热力工程;试验;导热性;固体
【英文主题词】:
【摘要】:Thecomparativemethodofmeasurementofthermalconductivityisespeciallyusefulforengineeringmaterialsincludingceramics,polymers,metalsandalloys,refractories,carbons,andgraphitesincludingcombinationsandothercompositeformsofeach.Properdesignofaguarded-longitudinalsystemisdifficultanditisnotpracticalinamethodofthistypetotrytoestablishdetailsofconstructionandprocedurestocoverallcontingenciesthatmightofferdifficultiestoapersonwithouttechnicalknowledgeconcerningtheoryofheatflow,temperaturemeasurements,andgeneraltestingpractices.Standardizationofthistestmethodisnotintendedtorestrictinanywaythefuturedevelopmentbyresearchworkersofnewormethodsorimprovedprocedures.However,neworimprovedtechniquesmustbethoroughlytested.RequirementsforqualifyinganapparatusareoutlinedinSection10.1.1Thistestmethoddescribesasteadystatetechniqueforthedeterminationofthethermalconductivity,,ofhomogeneous-opaquesolids(seeNote1andNote2).Thistestmethodisformaterialswitheffectivethermalconductivitiesintheapproximaterange0.2200W/(mK)overtheapproximatetemperaturerangebetween90and1300K.Itcanbeusedoutsidetheserangeswithdecreasedaccuracy.Note0Forpurposesofthistechnique,asystemishomogeneousiftheapparentthermalconductivityofthespecimen,A,doesnotvarywithchangesofthicknessorcross-sectionalareabymorethan5%.Forcompositesorheterogeneoussystemsconsistingofslabsorplatesbondedtogether,thespecimenshouldbemorethan20unitswideand20unitsthick,respectively,whereaunitisthethicknessofthethickestslaborplate,sothatdiameterorlengthchangesofone-halfunitwillaffecttheapparentAbylessthan5%.Forsystemsthatarenon-opaqueorpartiallytransparentintheinfrared,thecombinederrorduetoinhomogeneityandphotontransmissionshouldbelessthan5%.Measurementsonhighlytransparentsolidsmustbeaccompaniedwithinfraredabsorptioncoefficientinformation,ortheresultsmustbereportedasapparentthermalconductivity,A.Note2Thistestmethodmayalsobeusedtoevaluatethecontactthermalconductance/resistanceofmaterials.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A42
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】: