پديد آورنده :
وحيد دستجردي، حميد
عنوان :
سنتز و مشخصه يابي نانو فيلترهاي آلومينا - تيتانيايي به روش سل - ژل
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
استخراج فلزات مواد
محل تحصيل :
اصفهان : دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
نه، 109، [II] ص. : مصور، جدول، نمودار
يادداشت :
ص. ع. به : فارسي و انگليسي
استاد راهنما :
احمد كرمانپور، محمد حسن عباسي
تاريخ نمايه سازي :
23/7/1387
استاد داور :
احمد محب، رحمت الله عمادي
چكيده فارسي :
به فارسي و انگليسي : قابل رويت در نسخه ديجيتال
چكيده انگليسي :
AbstractCeramic nanofilters is nowadays exposed to great attention in different industrialapplications In this work the combind alumina titania nanofilters were produced with sol gelmethod Different parameters affecting the of substrate characteristics and nanometer coatingwere studied Alumina substrates were produced with slip casting method using differentamounts of alumina powder binder dispersant and sintering temperature The effect of slipmilling on the quality and size of substrate particles and pores were studied Taguchi methodwas used in this study to reduce the number of required experiments The optimum substrateproduced was coated with titania by sol gel process and dip coating In this step the effects ofratio of hydrolyze water to alkoksid ratio pH dip coating time and the number of layerswere studied Characterization of substrate and coating samples was performed by SEM XRD XRF laser particle size analyser and mercury porosimetry The primary results showedthat slip milling before casting resulted in a considerable reduction in the average size ofparticles and pores of alumina substrate It was found that the suitable conditions forproducing the alumina substrate were 20 powder 300 ml poly vinyl alcohol binder for 100gr alumina slip milling for 30 minutes and sintering temperature at 1500 C Under theseconditions a substrate without any crack with the average pore size of 268 nm 8 surfaceporosity and 36 open porosity was produced Also a stable Titania sol was produced withhydrolyze ratio of 30 and pH 1 9 The best dip coating conditions were recognized ashaving two steps with the entering and with drawling velocity of 18 mm min and the dipcoating times of 1 minute for the first stage and 30 seconds for the second one Under suchconditions a uniform coating without any crack with the average size of 4 7 nm and athickness of 600 nm on the alumina substrate was prepared The combined alumina titaniananofilter can be successfully nead as a proper membrane for industrial application
استاد راهنما :
احمد كرمانپور، محمد حسن عباسي
استاد داور :
احمد محب، رحمت الله عمادي
