溶膠—凝膠法制備釔鋇銅氧薄膜的研究.pdf

1、西安理工大學碩士學位論文溶膠—凝膠法制備釔鋇銅氧薄膜的研究姓名：馬懷香申請學位級別：碩士專業(yè)：材料物理與化學指導教師：趙高揚20040301西安理工大學碩士學位論文PREPARATIONOFYBCOTHINFILMSBYSOLGELPROCESS?Auth:MaHuaixiangSupervis:Prof.ZhaoGaoyangAbstractYBCOhightemperaturesuperconductfilmholdsgreatpr

2、omisefapplicationsininfrareddetectquantainterferometersoon.PresentlythemainmethodsofpreparingYBCOfilmshavemagronsputteringlaserdeposition.InthispaperthedenseYBCOwithperovskitestructurewereexpectedtobepreparedbySolGelproc

3、ess.TheconfectingmethodsofsolwerediscussedusinginganicsaltasprecursstheFTIRwasadoptedtoanalysethechemicalreactionfilmfmingmechanismofstablesol.ThetechniquesofpreparingfilmbufferlayersonSiwerestudied.TheSEMTEMXRDwereadopt

4、edtostudythecrystalstructureoffilms.TheinfluencesofbufferlayerssubstrateheattreatmentconditiononthecrystalstructureperfmanceoftheYBCOfilmswerediscussed.Theresultsarelistedasfollows:(1)TheinganicacetateofYBaCuwereusedaspr

5、ecurssdiethyleriaminelacticacidαmethacrylicacidascomplexingagentsrespectively.ThestablefluinefreeYBCOsolcanbeobtained.(2)TheYSZSTObufferlayerswerepreparedbySolGelprocessonSisubstrates.theYSZSTOfilmscouldbeusedasthebuffer

6、layersbetweenSisubstrateYBCOfilms.(3)AccdingtothestudyofheattreatmentprocessheattreatmentambienceairflowheattreatmenttemperaturewereconsiderdastheimptantinfluencesonthequalitypropertyofYBCOfilms.Throughoptimizingtheproce

7、sstheYBCOfilmswerepreparedonSTOsinglecrystaltheirroomtemperatureresistancewasabout200?.YBCOfilmsalsowerefabricatedontheSTObufferedSisubstratetheirroomtemperatureresistancewasabout300?.(4)Throughelectrondiffractionitwasde

8、terminedthefilmsofYBa2Cu4O8superconductingstructurehadbeenpreparedusingYSZasbufferlayers.ThroughXRDtestingitwasindicatedtheYBCOpowderhadYBa2Cu3O7δsuperconductingstructure.keywds:YBCOSolGelperovskitebufferlayersThispaperw