کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10625176 | 989615 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Micro-porous silica-yttria membrane by sol-gel method: Preparation and characterization
ترجمه فارسی عنوان
غشاء سیلیس یتیتی میکرو متخلخل به روش سل ژل: تهیه و مشخص نمودن
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کلمات کلیدی
غشای سرامیک، پایداری هیدروترمال خشونت، سیلیکا، ژل سولا، یتریا،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Micro-porous yttria doped silica membrane, fabricated on alpha-alumina substrate and gamma-alumina interlayer, has been prepared via the polymeric sol-gel method. In order to investigate the hydrothermal stability of the membrane, silica sols with different amounts of 5, 15 and 25 wt% yttria were prepared. These sols showed particle size distributions in the range of 0.6-3 nm. It was found that the hydrothermal stability of the unsupported silica-15% yttria membrane heat treated at 500 °C is the highest according to the results of FTIR analysis showing the formation of Si-O-Y bonds. XRD data showed thermal stability up to around 800 °C for the unsupported silica membrane with 15% yttria. N2 adsorption-desorption isotherm confirmed the existence of micro-porous structure for this membrane as BET surface area and average pore size of the unsupported membrane was 286 m2gâ1 and 1.9 nm, respectively. Modified substrate surface reduced average roughness and a layer with similar roughness and pore size was achieved. Cross sectional images by FESEM showed the thickness of 680 nm for the obtained membrane.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 40, Issue 7, Part A, August 2014, Pages 9403-9411
Journal: Ceramics International - Volume 40, Issue 7, Part A, August 2014, Pages 9403-9411
نویسندگان
Shirin. Khanmohammadi, Ehsan. Taheri-Nassaj,