کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9684657 | 1456207 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Zirconia-zircon composite microfiltration membranes based on porous alumina supports
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
Supported zirconia-zircon composite microfiltration layers produced by the dip-coating procedure are introduced for the first time. These can be produced using commercial grade monoclinic-zirconia powders having high silica content. Such membranes have the advantage of enhanced sintering due to a liquid-phase mechanism. These were prepared through dip-coating α-alumina supports with slips of zirconia powder stabilized with 'aluminon' and further sintering (1050-1200 °C). Optimum dispersant concentration and pH had been found based on sedimentation tests and UV-vis spectroscopy method. The effect of slip concentration, sintering temperature and number of coatings on the membrane characteristics has been studied. There exists a maximum sintering temperature of 1150 °C for the creation of minimum pore diameters lower than 0.2 μm with a reasonable surface microhardness of Hardness Vickers at 50 g force pyramidal load (ca. 110 HV50) and no observable crack. This work includes a comparative study with membrane layers produced with an analogous preparatory method using high purity monoclinic zirconia with a similar particle size distribution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 263, Issues 1â2, 15 October 2005, Pages 103-112
Journal: Journal of Membrane Science - Volume 263, Issues 1â2, 15 October 2005, Pages 103-112
نویسندگان
Cavus Falamaki, Zahra Khakpour, Alireza Aghaie,