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《p型bi2te3基復(fù)合熱電材料的制備及其性能分析》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、東華大學(xué)碩士學(xué)位論文摘要307%。通過(guò)引入不同粒徑的CuAlO2，利用納米顆粒和微米顆?；瘜W(xué)穩(wěn)定性的差異，實(shí)現(xiàn)了復(fù)合材料的熱導(dǎo)率、電導(dǎo)率和Seebeck系數(shù)的協(xié)同調(diào)控，為低成本調(diào)控?zé)犭姴牧闲阅芴剿髁艘粭l新途徑。關(guān)鍵詞：熱電材料，Bi0.5Sb1.5Te3，CuAlO2，熱電性能IV萬(wàn)方數(shù)據(jù)東華大學(xué)碩士學(xué)位論文AbstractTHEPREPARATIONANDTHERMOELECTRICPROPERTIESOFP-TYPEBi2Te3-BASEDCOMPOSITETHERMOELECTRICMAT
2、ERIALSABSTRACTBi2Te3-basedalloysarethestate-of-the-artthermoelectricmaterialswithaZT(figureofmerit)ofabout1atroomtemperature.Amongthem,Bi2-xSbxTe3isthebestoptimizedP-typeBi2Te3-basedalloy.AlthoughBi2Te3-basedthermoelectricmaterialshaveachievedsomepro
3、gressinpowergenerationandsemiconductorcooling,ithasnotrealizedthelargescaleapplicationsyetduetothehighcostofrawmaterials,timeconsumptionandnothighenoughthermoelectrictransferefficiency.Hence,howtorealizethepreparationofhigh-performancethermoelecteicm
4、aterialsthroughthelowcostmethodwillhaveprofoundmeaningsforpromotingthethermoelectricmaterialsanditsdevicesapplications.Thethreeparameters:Seebeckcoefficient(α),electricalconductivity(σ)andthermalconductivity(κ)thatdeterminethefinalZTvaluesarestrongly
5、coupledviabandstructuresandscatteringmechanisms.Therefore,howtooptimizethreeparamaterssynchronouslyisthebigissueforthermoelectricmaterials.Thekeytodevelopthehigh-performancethermoelectricmaterialsistoimproveboththeelectricalconductivityandSeebeckcoef
6、ficientwhiledecreasingthethermalconductivity.Inthispaper,wefirstprepareBi2-xSbxTe3powdersbylowcosthydrothermalmethod,thenthesecondphaseisintroducedtorealizetheimprovementinZTvaluebyenhancingboththeelectricalconductivityandSeebeckcoefficient,atthemean
7、time,reducingornotlargelyaffectingthethermalconductivity.Inthisstudy,weintroduceMWCNT,AgNWsandCuAlO2torealizethesynchronouslyoptimizationofthesethressparameterstoenhancethefinalZTvalues.Inthispaper,V萬(wàn)方數(shù)據(jù)東華大學(xué)碩士學(xué)位論文Abstracthydrothermalmethodcombinedwit
8、hSparkPlasmaSinteringisusedtopreparetheBi0.4Sb1.6Te3matrix.Multi-scaleCuAlO2powdersispreparedbysolidreactionsinteringmethod.MWCNT、AgNWsandCuAlO2areseparatelyintroducedintoBi0.4Sb1.6Te3nanopowderstoformthecompositepowders.Thenthesecompositepowderswere
