توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Synthesis of submicron alumina powder via a new wet chemical method
نویسنده(ها): ، ، ،
اطلاعات انتشار: پنجمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۷
Basic aluminium sulphate (BAS) was prepared by forced hydrolysis of aluminium salt solution followed by precipitation with a sulphate solution. The BAS powder was transformed into crystalline basic ammonium aluminum carbonate (ammonium dawsonite) by treating BAS with ammonium carbonate solution. FTIR spectroscopy was used for the identification of materials. Submicron α–alumina with mean particle size of 0.23 μm was obtained by heating ammonium dawsonite at 1150°C for 1 h. Phase transformation sequence of ammonium dawsonite was investigated by means of XRD. SEM micrograph confirms formation of submicron powder.<\div>

۲Fabrication and Characterization of Multilayer α–Alumina NF Membranes
نویسنده(ها): ، ، ،
اطلاعات انتشار: پنجمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۹
Multilayer ceramic membranes were successfully fabricated via a controlled method. Tubular alumina porous support systems with an open porosity about 48% dip–coating and pore size in the range of 100–600 nm were used as membranes substrate. Submicron and nano alumina powders were used to prepare membranes intermediate and top layers, respectively. The effects of the several parameters on the structural properties of the prepared membranes were studied to get an appropriate pore size and defect–free surface. The morphology and multilayer structure of the final NF membranes were characterized using SEM and optical microscopy (OM). The pore size distribution of multilayer NF membranes was measured by mercury porosimetry (MP).<\div>
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