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MaterialsandDesign28(2007)1699–1706

Effect of sintering temperatur eanddwelltimeandpressingpressureon perovskite-typemembranes

AliMosadeghkhah,MohammadAliAlaee,TorajMohammadi

Abstract

 (designedasBSCF)oxidespreparedatdifferentshapingandsinteringparametersunderthesamepowdersynthesismethodwereexaminedintermsofmicrostructureanddiskdensities.Theoxidepowdersweresynthesizedusingcitrate–EDTAcomplexingmethod.Thesynthesizedpowderswerethenformedtodiskshapedmembranesatsinteringtemperaturesof1000,1050and1150�C,pressingpressuresof1000,2000and2500barandsinteringdwelltimesof2,6and10h,asthebestvaluestocovercommonusedrangesoftheparameters.X-raydiffraction(XRD)resultsofallsamplespreparedatdifferentconditionrevealedthatthebasicstructureofperovskitewasformed.Althoughthesamplespreparedatdifferentconditionshavenearlythesamemicrostructure,theydemonstrateddifferentrelativedensities,porositiesandgrainmorphologies.Themembranesynthesizedathighesttemperatureandpressureshowedthehighestrelativedensity,vigorousgrowthofcrystals,betterfusionofperovskitestructureandlessporenumbers.Theresultshowedthatthebestsinteringdwelltimeisabout8–9andafterthattimethereisnochangeinmembranecharacteristics.


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