BS ISO 9286-1997 磨料颗粒和粗料.碳化硅的化学分析

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【英文标准名称】:Abrasivegrainsandcrude-Chemicalanalysisofsiliconcarbide
【原文标准名称】:磨料颗粒和粗料.碳化硅的化学分析
【标准号】:BSISO9286-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1997-06-15
【实施或试行日期】:1997-06-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Abrasives;Aluminiumoxide;Chemicalanalysisandtesting;Determinationofcontent;Finishes;Impurities;Rawmaterials;Samplingmethods;Siliconcarbide;Surfaces;Testing;Tools
【摘要】:ThisInternationalStandardcoversthechemicalanalysisofsiliconcarbidebasedabrasivegrainsandcrudes.ItisapplicableforthedeterminationofthesurfaceimpuritiesofabrasivesgrainsanddeterminingtheSiCcontentofcrushedcrudewhenthesiliconcarbidecontentisgreaterthan95%(m/m).Whenthegrainsizeofthesiliconcarbideisgreaterthanorequalto15μm,thedeterminationofthelossonacidtreatmentiscarriedoutaccordingtothemethodgivenin3.5andtheresidualSiCcontent(SiCR)accordingtothemethodgivenin3.7.Whenthegrainsizeofthesiliconcarbideissmallerthan15μm,thedeterminationoftheSiCcontentshallbecarriedoutbythemethodsdescribedin4.3and4.4.2.1or4.4.2.3and4.5becausethemethodsgivenin4.2and3.7inevitablygivefalseresultsduetooxidation.Whenthesurfacecarboncontent[w(Csurf)]isgreaterthan2%(m/m),acoulometricdeterminationaccordingtothemethoddescribedin3.4.2.3willgivecorrectresults.Thegravimetricmethoddescribedin3.4.2.1isonlyapplicabletosurfacecarboncontentswhicharegreaterthan2%(m/m),ifignitioniscontinuedtoaconstantweightoraweightincrease.Thecoulometricmethoddescribedin3.4.2.2cannotbeappliedincaseswherew(Csurf)ismorethan2%.
【中国标准分类号】:J43
【国际标准分类号】:25_100_70
【页数】:30P;A4
【正文语种】:英语