کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10624528 | 989603 | 2015 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Design and preparation of high permeability porous mullite support for membranes by in-situ reaction
ترجمه فارسی عنوان
طراحی و آماده سازی نفوذپذیری بالا ملویت متخلخل برای غشاء با واکنش موضعی
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کلمات کلیدی
حمایت کردن، غشای سرامیک، نفوذ پذیری بالا، واکنش در محل،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
The natural mineral kaolin combined with alumina additives Al(OH)3,α-Al2O3 and AlF3 was used to prepare porous mullite ceramic membrane supports using an in-situ reaction. The effects of composition and sintering temperature on the sintering behavior, pore structure, permeability and microstructure of the resulting porous mullite supports were extensively investigated. The experimental results showed that excess SiO2 in kaolin can be consumed by adding alumina precursors, which resulted in a stiff skeleton of interlinked needle-like mullite crystals in-situ during the sintering. The needle-like mullite crystals touched each other and formed a short network, which acted as a porous skeletal network structure. This network resulted in a highly permeable porous structure. The resulting support is suitable for the preparation of asymmetric ceramic membranes. The densification and pore structure of the support can be effectively adjusted by control of the quantity of alumina precursors in the composition and the sintering temperature. Sintering the subject mullite compositions at 1500 °C for two hours resulted in support structures with an average porosity of 45.9%, an average pore size of 1.3 µm and a penetrating porosity of 35.9%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 41, Issue 7, August 2015, Pages 8282-8287
Journal: Ceramics International - Volume 41, Issue 7, August 2015, Pages 8282-8287
نویسندگان
Gangling Chen, Xiutao Ge, Yong Wang, Weihong Xing, Youzhi Guo,