高壓處理對(duì)金屬氧化物特性的影響.pdf

1、分類號(hào)UDC密級(jí)學(xué)校代碼10盛97學(xué)劣搏對(duì)筍大亨位論t又題目英文題目研究生姓名高壓處理對(duì)金屬氧化物特性的影唯EffeetofHighPressureandTemPeratureTreatmentonthePronertiesofMetalOxide徐萍指導(dǎo)教師姓名田旭職稱教授單位名稱理學(xué)院郵編學(xué)位碩士430070中請(qǐng)學(xué)位級(jí)別碩士學(xué)科專業(yè)名稱凝聚態(tài)物理一論文提交日期2008年H月論文答辯日期2008年12月學(xué)位授予單位武漢理工大學(xué)學(xué)位授予

2、日期答辯委員會(huì)主席晏石林評(píng)閱人李建青黎明發(fā)2008年12月武漢理_人學(xué)碩十學(xué)位論文AbstraetInthisPaPer，effeetofhighPressureandtemPeraturetreatmentontheProPertiesofMetalOxideweremainstudied.AsanexamPletothemierostrUctureandsinteringdensityofzno月12典whiehunderhighp

3、ressuretemperatureTheZnOandA12O。nanoerystalswereProeessedunderhighPressureandtemPeratureonaeubichighPressureaPParatus.Thetreatedtimewas25minutes.ThemierostructureoftheobtainedZnOA12qwereacterizedbyscanningeleetronmierose

4、oPy(SEM)andX一raydiffraetion(XRD)，theSinterlngdensltyofthesamplesweremeasuredwithdralnagemethod.WiththeexPerimentalresults，effeetofhighPressureandtemPeraturetreatmentonthemicrostruetureandSlnteringdensityofZnOandA12qnanoc

5、rystalsWereinVestigated.Firstl又thevarietyofmorphology，grainsizes，andstructureofthesamPleswerestudiedunderdifferenttemPeratureandPressure.TheSEMandXRDresultsshow:thePhasetransformationdldn’thappentothesa哪lesofA12O3whlehwe

6、retreatedunderhzghtemPeratureandhighPressure.UnderthehighPressure，asthetemPeratureincrease，thegrainsizesofthesamPlesincrease.Iteanbeseenunifmgrainsizeofalumina.AlloftheZnOsamPlesintheexPerimentPresentahexagonalwurtzitest

7、rueture.ThenanoerystalseventuallytransfmtobulkmaterialswhilethegrainsizesinereasewiththetemPeratureinereasingunderaeertainPressure.ItindieatesthathightemPeratureeanobviouslyPromotethegrowthofthegrain.AndunderthehightemPe

8、rature，thegrainsizeinereaseswithinereasingthePressure.Underthe6GPa、850oCtreatment，thePhasetransfmationofZnOwasnotobserved.Therefe，theresearchonthePhasetransfmationofZnOshouldbedoneunderhigherPressureandtemPeratureeonditi

9、ons.Then，measuringline一shrinkagerate，densityofsinteredsamPles.AndeffeetofhighPressureandtemPeraturetreatmentontheSinteringdensityofZnOA12qnanoerystalswereinvestigated.TheresultsshowthatasthetemPeratureandPressureinerease