【英文标准名称】:Determinationofthespecificsurfaceareaofpowders.BETmethodofgasadsorptionforsolids(includingporousmaterials)
【原文标准名称】:粉末比表面积的测定.第1部分:气体表面吸附(BET)推荐方法(包括多孔物质)
【标准号】:BS4359-1-1996
【标准状态】:作废
【国别】:英国
【发布日期】:1996-04-15
【实施或试行日期】:1996-04-15
【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】:疏松材料;细度;氮;控制样品;吸附指示剂;容量分析;气体;渗透性测量;表面吸附;面积测量;细度试验;重量分析;尺寸;固体;表面;数学计算;设计;试验条件;粒状材料;压力;试样制备;气体分析;试验设备
【英文主题词】:Adsorption;Analysis;Areameasurement;BETmethod;Brunauer;Definitions;Determination;Disperse;Emmett;Finishes;Fundamentalquantity;Gasadsorption;Gases;Interpretations;Measurement;Measuringtechniques;Methods;Plates(tableware);Porosity;Referencematerials;Solids;Surfaceproperties;Surfaces;Testing
【摘要】:ThsInternationalStandardspecifiesthedeterminationofthetotalspecificexternalandinternalsurfaceareaofdisperseorporoussolidsbymeasuringtheamountofphysicallyadsorbedgasaccordingtothemethodofBrunauer,EmmettandTeller(BETmethod)[1],basedonthe1984IUPACRecommendations[2].TheBETmethodisapplicableonlytoadsorptionisothermsoftypeII(disperse,nonporousormacroporoussolids)andtypeIV(mesoporoussolids,porediameterbetween2nmand50nm)(seefigure1).Inaccessibleporesarenotdetected.TheBETmethodcannotreliablybeappliedtotypeIisothermsortosolidswhichabsorbthemeasuringgas.note:1)Forsolidsexhibitingachemicallyheterogeneoussurface,e.g.metal-carryingcatalysts,theBETmethodgivesthetotalsurfacearea,whereasthemetallicportionofthesurtaceareamaybemeasuredbychemisorptionmethods.
【中国标准分类号】:A50
【国际标准分类号】:17_040_20;19_120
【页数】:16P.;A4
【正文语种】:英语