納米二氧化釩粉體制備及摻雜對(duì)其相變性能影響的研究.pdf

1、重慶大學(xué)碩士學(xué)位論文納米二氧化釩粉體制備及摻雜對(duì)其相變性能影響的研究姓名：林華申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料科學(xué)指導(dǎo)教師：黃維剛20040518莖壅莖堂堡圭蘭壟蘭莖蔞奎塑至ABSTRAC零V02isatypicalthermochromiccompound，thephasetransitiontemperatureis68“(2Withtheincreaseoftemperatureithasmetalto—semiconductortr

2、ansitionat68。C，anditsphysicalpropertieschange，too。Forexample，electricalresistancehas4—5magnitudeabruptchanges，accompaniedbyabruptchangesinmagneticsusceptibilityopticalindexofrefractiontransmissivityandreflectivityanditha

3、sinfiaredscreenfunctionTheimportanceisthatitsphasetransitiontemperaturecarlbechangedbydopingTherefore，V02hasgreatapplicationpotentials，suchasbuildings’solartemperature—controldevices，photo—electricityswitchmaterials，ther

4、mistormaterials，emserableopticalstorematerials，theprotectivedevicesforlaserblindlyweapons，photochromicmaterials，andmodulatorofmicro—We镕tverad2ationetc，AtpresenttherehavebeenmanystudiesonV02filmandtosomeextent，itsapplicat

5、ionislimitedButV02powderhasgreaterapplicationareasandprospectsRecentlyithasbeenfoundthatllanoV02hasmuchbetterphysicalproperties，HencestudiesfocusingonV02powderhaveveryimportanttheoreticalandrealisticmeaningsBasedonrichVa

6、nadiumresourceinPanzhihua，forthefirsttime，onlydopingandmultidopingllanoV02throughthem：aldecompositionhavebeenproduced，electricityandopticspropertiesofV02強(qiáng)differentteehnologScaIandexperimentalconditionsstudied，thermaldeco

7、mpositionprocessofprecursorthestructureandformofnanoV02，andthechangeofelectronbandstructureafterdopinganalyzedsystematicallybyTGDSC，XRD，TEM，andXPStechniques。Thedissertationgetsvaluableresults。①Forthefirsttimebyusingindus

8、tryV205powderasrawmaterialthroughH2C204reduction，vo(c204)2一H20andcorrespondingdopingprecursorhavebeenproducedThemethodissimpleandeasytepeat②TheparticlesizeofnanoV02producedafterthermodecompositionis20～30nm，anditsdistribu

9、tioniseveningredientofV02ispure，itsphasetransitiontemperatureis695V，anditsresistanceabruptchangereachestwomagnitudes，ithasobviousscreenfunctionwithinnearinfraredraymudithasgoodthermochromicstability③NanoV02powderdopedwit