【英文标准名称】:StandardTestMethodsforPrecipitatedSilica-SurfaceAreabySinglePointB.E.T.NitrogenAdsorption
【原文标准名称】:沉淀二氧化硅的标准试验方法.用单点B.E.T.氮的吸附法沉淀的硅表面积
【标准号】:ASTMD5604-1996(2006)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:D11.20
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:石墨;气体吸附;材料;粒径分析;测试;试验
【英文主题词】:nitrogenadsorptionsurfacearea;precipitatedhydratedsilica;silicas;surfacearea
【摘要】:ThesetestmethodsmeasuretheapproximatesurfaceareaofprecipitatedhydratedsilicasthatisavailabletothenitrogenmoleculeusinganapproximationoftheB.E.T.method.Whilethemulti-pointversionoftheB.E.T.methodisgenerallyacceptedasbeinglesspronetoerrorsarisingfromthevaryingsurfacepropertiesofindividualsamples,thesingle-pointapproximationisoftenadequateduetotheshortertimepertestandrelativesimplicityoftheinstrumentationneeded.Qualitycontrolapplicationsandcomparativetestsonnear-identicalsamplesofclosechemicalandmicro-structuralcompositionarelikelytobetheapplicationsofgreatestvalue.1.1Thesetestmethodscoveraproceduretomeasurethesurfaceareaofprecipitatedhydratedsilicasby,asinglepointapproximationoftheBrunauer,Emmett,andTeller(B.E.T.)theoryofmultilayergasadsorption.Thesetestmethodsspecifythesamplepreparationandtreatment,instrumentcalibrations,requiredaccuracyandprecisionofexperimentaldata,andcalculationsofthesurfacearearesultsfromtheobtaineddata.1.2Thesetestmethodsareusedtodeterminethesinglepointnitrogensurfaceareasintherangeof10to50hm2kg(10to500m2/g).1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Theminimumsafetyequipmentshouldincludeprotectivegloves,sturdyeyeandfaceprotection.
【中国标准分类号】:H81
【国际标准分类号】:19_120
【页数】:5P.;A4
【正文语种】: