Designation:C1182−09(Reapproved2014)StandardTestMethodforDeterminingtheParticleSizeDistributionofAluminabyCentrifugalPhotosedimentation1ThisstandardisissuedunderthefixeddesignationC1182;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationoftheparticlesizedistributionofaluminaintherangefrom0.1to20µmhavingamedianparticlediameterfrom0.5to5.0µm.1.2Theproceduredescribedinthistestmethodmaybesuccessfullyappliedtootherceramicpowdersinthisgeneralsizerange.Itistheresponsibilityoftheusertodeterminetheapplicabilityofthistestmethodtoothermaterial.1.3ThevaluesstatedinSIunitsaretoregardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C242TerminologyofCeramicWhitewaresandRelatedProductsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethods3.Terminology3.1Definitions:3.1.1RefertoTerminologyC242fordefinitionsoftermsusedinthistestmethod.4.SummaryofTestMethod4.1Ahomogeneousaqueousdispersionofthepowderisprepared.Whilekeptinathoroughlymixedcondition,asmallaliquotistransferredtotheanalyzersamplecell,whichisplacedintheinstrumentandsubjectedtoacontrolledcentrifu-galaccelerationataknownorcontrolledtemperature.AtpredeterminedtimesrelatedtothesedimentationofspecificStokes’diameters(Note1),theopticalabsorbanceisrecordedandratioedtotheinitialvaluetodeterminethefractionofthetotalsamplethathassedimentedaspecificdistance.Avolumebasedsizedistributioniscalculatedfrom...
