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1、MaterialsLetters61(2007)582–584www.elsevier.com/locate/matletGassensingpropertiesofleaddopedtinoxidethickfilmsT.D.Senguttuvan?,RadheshyamRai,S.T.LakshmikumarElectronicMaterialsDivision,NationalPhysicalLaboratory,Dr.K.S.KrishnanMarg,NewDelhi-110012,IndiaRe
2、ceived18February2006;accepted10May2006Availableonline16June2006AbstractThepresentinvestigationdealswiththefabricationofliquidpetroleumgas(LPG)sensormaterialsbasedonsemiconductingoxideSnO2.Thegassensormaterialshavebeenpreparedbyconventionalsolid-stateroute
3、.TheeffectofPbincorporation,operatingtemperature,morphology,andsensitivityisdiscussedusingtheresultsofX-raydiffraction(XRD),alongwithsensingperformance.Outofvarioussensorcompositions,PbdopedSnO2sinteredat1000°Cfor2hhasshownhighsensitivitytowardsLPGatanope
4、ratingtemperatureof150°C.Differentcharacterizationtechniqueshavebeenemployed,suchassurfaceareaanalyzer,X-raydiffraction(XRD),tostudytheformationofSnO2,surfaceareaandcrystallitesize,respectively.Theresultssuggestedthepossibilityofutilizingthesensorelementf
5、orthedetectionofLPG.?2006ElsevierB.V.Allrightsreserved.Keywords:Gassensor;Sensitivity;Sensitize;Liquidpetroleumgas1.Introductiongasdiffusion,holdsakeytoimprovingthesensorresponse,aspointedoutbySakaietal.[5,6].ThegrainsizeofSnO2ingasOxidesemiconductorgasse
6、nsorshavebeenextensivelysensorsusuallyrangesfromafewnanometertoseveraltensstudiedinordertounderstandorimprovetheirsensingnanometerinmeandiameter,sothatthesensingbodyincludespropertiestoinflammableandtoxicgases.Amongavarietypores(2–50nminradius)besidemacro
7、-andmicro-pores.Itisofoxidesemiconductors,tindioxide(SnO2)hasproveditselftopossibletofabricatesensordevices,whichhavewell-definedbeoneofthemostattractivematerialforgassensorapplicationsmicrostructurewithauniformgrainsize.Thegrainsizeeffectfromaviewpointof
8、gassensitivityaswellaschemicalstability.andthemicrostructureeffectappeartoprovidethebaseonThegassensingpropertiesofSnO2sensorshasbeenshowntowhichmethodologyfordesigninghighsensitivitygassensorsisbeinfluencedbymanyin
