BS 7182-1990 不透气化学防护服装规范

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【英文标准名称】:Testingmethodsforinsulatingmaterials.Measurementoftotalinsulationresistance.
【原文标准名称】:绝缘材料的试验方法.测定总绝缘电阻
【标准号】:NFC26-210-1965
【标准状态】:现行
【国别】:法国
【发布日期】:1965-04-01
【实施或试行日期】:1966-12-01
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:表面绝缘电阻;电阻率;试样;固体;电极;电阻;电阻测量;绝缘材料;绝缘电阻;试验装置;塑料;工艺;测量;电阻器;术语;电绝缘材料;固体绝缘材料;定义;试验报告;试验;条件;电气工程;材料
【英文主题词】:Conditions;Definition;Definitions;Electricalengineering;Electricalinsulatingmaterials;Electricalresistance;Electrodes;Insulatingmaterials;Insulatingresistance;Materials;Measurement;Plastics;Processes;Resistancemeasurement;Resistivity;Resistors;Solidelectricalinsulatingmaterials;Solids;Surfaceinsulationresistance;Terminology;Testreports;Testspecimens;Testing;Testingdevices
【摘要】:
【中国标准分类号】:K15
【国际标准分类号】:29_035_01
【页数】:4P.;A4
【正文语种】:其他


【英文标准名称】:Poresizedistributionandporosityofsolidmaterialsbymercuryporosimetryandgasadsorption-Analysisofmesoporesandmacroporesbygasadsorption
【原文标准名称】:用水银孔率法和气体吸附法测定固体材料孔径分布和孔隙率.用气体吸附法分析介孔和微孔
【标准号】:BSISO15901-2-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-03-30
【实施或试行日期】:2007-03-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:校正;定义;评定;气体吸附;材料;水银;粒度分布;孔径;孔隙率;孔隙度测量;疏松材料;规程;取样
【英文主题词】:Calibration;Definitions;Evaluation;Gasadsorption;Materials;Mercury;Particlesizedistribution;Poresizes;Porosity;Porositymeasurement;Porousmaterials;Procedures;Sampling
【摘要】:ThispartofISO15901describesamethodfortheevaluationofporosityandporesizedistributionbygasadsorption.Itisacomparative,ratherthananabsolutetest.Themethodislimitedtothedeterminationofthequantityofagasadsorbedperunitmassofsampleatacontrolled,constanttemperature.ThispartofISO15901doesnotspecifytheuseofaparticularadsorptivegas,howevernitrogenistheadsorptivegasmostcommonlyusedinsuchmethods.Similarly,thetemperatureofliquidnitrogenistheanalysistemperaturemostcommonlyused.Useissometimesmadeofotheradsorptivegases,includingargon,carbondioxideandkrypton,andotheranalysistemperatures,includingthoseofliquidargonandsolidcarbondioxide.Inthecaseofnitrogenadsorptionatliquidnitrogentemperature,thebasisofthismethodistomeasurethequantityofnitrogenadsorbedat77Kasafunctionofitsrelativepressure.Traditionally,nitrogenadsorptionismostappropriateforporesintheapproximaterangeofwidths0,4nmto50nm.Improvementsintemperaturecontrolandpressuremeasurementnowallowlargerporewidthstobeevaluated.ThispartofISO15901describesthecalculationofmesoporesizedistributionbetween2nmand50nm,andofmacroporedistributionupto100nm.ThemethoddescribedinthispartofISO15901issuitableforawiderangeofporousmaterials,eventhoughtheporestructureofcertainmaterialsissometimesmodifiedbypretreatmentorcooling.Twogroupsofproceduresarespecifiedtodeterminetheamountofgasadsorbed:--thosewhichdependonthemeasurementoftheamountofgasremovedfromthegasphase(i.e.gasvolumetricmethods),and--thosewhichinvolvethemeasurementoftheuptakeofthegasbytheadsorbent(i.e.directdeterminationofincreaseinmassbygravimetricmethods).Inpractice,staticordynamictechniquescanbeusedtodeterminetheamountofgasadsorbed.Toderiveporesizedistributionfromtheisotherm,itisnecessarytoapplyoneormoremathematicalmodels,whichentailssimplifyingcertainbasicassumptions.
【中国标准分类号】:A42
【国际标准分类号】:19_120
【页数】:40P;A4
【正文语种】:英语