Designation:D6745−22StandardTestMethodforLinearThermalExpansionofElectrodeCarbons1ThisstandardisissuedunderthefixeddesignationD6745;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofthecoef-ficientoflinearthermalexpansion(CTE)forcarbonanodesandcathodesusedinthealuminumindustry,inbakedform,byuseofavitreoussilicadilatometer.1.2Theapplicabletemperaturerangeforthistestmethodforresearchpurposesisambientto1000°C.Therecom-mendedmaximumusetemperatureforproductevaluationis500°C.1.3ThistestmethodandprocedureisbasedonTestMethodE228,whichisagenericall-encompassingmethod.Specificsdictatedbythenatureofelectrodecarbonsandthepurposesforwhichtheyareusedareaddressedbythisprocedure.1.4Electrodecarbonsinthebakedformwillonlyexhibitprimarilyreversibledimensionalchangeswhenheated.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2E228TestMethodforLinearThermalExpansionofSolidMaterialsWithaPush-RodDilatometerE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.Terminology3.1Definitions:3.1.1linearthermalexpansion,n—thechangeinlengthperunitlengthresultingfromatemperaturechange.Li...
