La-,2-NiO-,4-系類鈣鈦礦稀土復合氧化物薄膜的制備及氧敏性能研究.pdf

1、天津大學碩士學位論文LaNiO系類鈣鈦礦稀土復合氧化物薄膜的制備及氧敏性能研究姓名：樊麗瑩申請學位級別：碩士專業(yè)：無機非金屬材料指導教師：徐廷獻2000.12.1ABSTRACTInthispaperthesynthesis，gassensingpropertiesandtheinfluenceofdopingonLa2Ni04thinfilmwithnanocrystallinestructurehavebeenresearcheds

2、ystematicallyRare—earthperovskite1ikecomplexoxideLa2Ni04isanewlygassensingmaterialusedforautomotiveoxygensensorLa2Ni04milIfillhasbeenpreparedbymeansoftheinorganicsol—gel(ISG)methodusingnitrateasrawmaterialsandcitricacid8

3、5chelatingagentanderthanolandwaterassolventforthefirsttime1f1∞influenceofatmospheresinteringtemperatureandtemperatureprotectiontimeonthesynthesisofLa2Ni04thinfilmhavebeenresearchedLa2Niqthinfilmhasbeenpreparedunderlowero

4、xygenpressure(蝴andlowertemperattne(80012)Witheighttimes‘dipcoatingandNi“：citricacid=l：lLa2Ni04thinfillhasbeenpreparedunderN2atmosphereat800℃La，Ni04thinfilmpreparedbvtlleaboveprocessisPtypesemiconductorwhichhasgoodoxygens

5、ensingpropertieswithinthetemperaturerange500℃一800℃111e1唧onsespeedofH，isslowerthanthespeedofO，ThefilmhasuniformgraindistributionandhighporeratioobservedbySEM，TheeffectsofSrdopingonLasitehavebeenstudiedinthispaperThemajorr

6、esults玳asfollOWS(1)nledopingofSrenhancestheresponsespeedofH2，howeveritreducestheresponsespeedof02andsensitiv時；(2)thedopingofSrhaslOWerresistancetemperaturecoe伍cientatlowdopingquantities(x05)Inthispapertheoxygensensingpro

7、pertiesofLa2Ni04surfacemodifiedbyPdhasbeenresearched111emainresultsareasfolloW8(1)La2Ni04surfacemodifiedbyPdenhancestheresponsespeedofH2and02andsensitivitywithinawidetemperaturerangefrom300℃to800℃：(2)ithaslowerresistance