پديد آورنده :
جوانمردي، محمد
عنوان :
ساخت و مشخصه يابي نانو اسپينل آلومينات نيكل به روش فعال سازي مكانيكي
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
ده، 67ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
رحمت ا... عمادي، احمد منشي
توصيفگر ها :
مواد نانو ساختار , عمليات حرارتي
تاريخ نمايه سازي :
14/8/91
استاد داور :
محمدرضا طرقي نژاد، پرويز كاملي
تاريخ ورود اطلاعات :
1396/09/20
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Synthesis and characterization of nickel aluminate nanospinel by mechanical activation Mohammad Javanmardi Javanmardi m@ymail com May 20 2012 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M ScLanguage FarsiSupervisor R Emadi remadi@cc iut ac ir and A Monshi a monshi@cc iut ac ir AbstractIn recent years some Ni and Al containing ceramics have drawn interests in thedevelopment of industrial catalyst and anode in SOFC Nickel Aluminate NiAl2O4 issuch materials which introduce previously as a catalyst and recently as a anode for SOFC Furthermore nickel aluminate nanopowder has shown better catalytic behavior incomparison with micronize nickel aluminate The objective of present research was toprovide and characterize of nickel aluminate nanocrystalline powder by mechanicalactivation In this study aluminum alumina nickel oxide nickel carbonate magnesiumcarbonate ammonium fluoride and ammonium chloride powders were used as initialsmaterials Ammonium fluoride and ammonium chloride powders were utilize as thespeedup reagent of the process The influence of different factors such as mechanicalactivation time heat treatment temperature and time using calcined initial materials ammonium fluoride and ammonium chloride powders on the phase structure and crystallitesize of prepared powders was investigated Various techniques were employed to evaluateand characterize the produced product To evaluate the phase structure and support ofappearance of desirable phases in obtained composition X ray diffraction XRD technique was used Thermal gravimetry analysis TGA was used to evaluate the thermalbehavior of produced product To investigate the morphology and particle size distributionof starting and obtained powders Scanning electron microscopy SEM was employed Also morphology and crystallite size nanocrystalline nickel aluminate powders werecharacterized by Transition electron microscopy TEM Energy dispersive x ray EDX was used to investigate the solution while mechanical activation Considering performedexperiments and thermodynamic evaluation of the system some mechanisms wasproposed to explain reactions which were done in the procedure of producingnanocrystalline nickel aluminate powder as a hypothesis nanocrystalline nickel aluminatepowder could be provided by 5 h mechanical activation of aluminum and nickel carbonateafter post annealing at 1300 oC for 1 hour with crystallite size of 18 nm Results showedthat the presence of fluorine ions increased the reaction rate of single phasenanocrystalline nickel aluminate powder after 3 h mechanical activation and 1 h heattreatment at 1200 oC But the presence of colorine ions had vice versa effect In anotherroute nanostructure nickel aluminate powder with 53 nm crystallite size obtained by 5 hmechanical activation alumina and nickel carbonate powders and then 1 h heat treatment at1300 oC Key wordsNickel Aluminate Nanostructure materials Mechanical activation Heat treatment Spinel
استاد راهنما :
رحمت ا... عمادي، احمد منشي
استاد داور :
محمدرضا طرقي نژاد، پرويز كاملي
