پديد آورنده :
قاسمي نجف آبادي، صمد
عنوان :
ارزيابي فرآيند تبلور در شيشه هاي توليدي از ضايعات صنايع آهن و فولاد و بررسي خواص شيشه سراميك هاي حاصل
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسايي و انتخاب و روش ساخت مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
نه، 74، [I]ص.: مصور، جدول، نمودار
يادداشت :
ص. ع. به فارسي و انگليسي
توصيفگر ها :
فرآيند عمليات حرارتي , كريستاليزاسيون , جوانه زني , تهيه بچ , استحكام خمشي
استاد داور :
مظفري نيا، رحمت الله عمادي
تاريخ ورود اطلاعات :
1396/02/24
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
AbstractWith stepping up the environmental regulations disposing waste products is a major difficultyof industries The iron and steel industries regarded as biggest production industries andproduce a lot of wastes From various recycling and reusing of these wastes glass ceramicprocess is economically one of the best processes Glass ceramics are polycrystalline solidsprepared by the controlled crystallization of glasses Crystallization is accomplished bysubjecting suitable glasses to a carefully regulated heat treat schedule which resulted in thenucleation and growth of fine and equally distributed crystal phases within the glassy matrix In this study the possibility of using different mixtures of iron and steel productionwastes such as Blast furnace slag and industrial dusts for production of glass ceramics hasbeen investigated After mixing different raw materials melting of batches have been carriedout at 1450 C Using differential thermal analysis DTA the crystallization temperature wasdetermined The results showed that there is colloidal metallic iron particles in the center ofceramic phases formed during heat treatment The area density of ceramic phases formed inglass ceramic sample was equal to the number of iron particles present in base glass Themetallic iron particles are formed in the glass as a result of reduction of iron oxides Theresults indicate that the major crystalline phase formed during crystallization was pyroxeneand its formation can be explained as bulk and heterogeneous growth on fixed number ofcolloidal iron particles dispersed in base glass For investigating the kinetic of crystal growth the samples were heat treated at 700 750 800 and 850 C for 1 2 and 4 hour and the mean length of ceramic phases in each heattreated sample evaluated using SEM Applying the derived data in theoretic growth equationsreveals that in the studied system the parabolic growth equation is followed The activationenergy of growth was 129 kJ mole
استاد داور :
مظفري نيا، رحمت الله عمادي
