کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1473885 991067 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Recycling of waste fly ash for production of porous mullite ceramic membrane supports with increased porosity
ترجمه فارسی عنوان
بازیافت زباله های خاکستر برای تولید غشاء سرامیک متخلخل با افزایش تخلخل
کلمات کلیدی
غشای سرامیک، حمایت از غشای مولتی، خاکستر را از بین ببرید، قطر بینی، قدرت مکانیکی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

Low-cost porous mullite ceramic membrane supports were fabricated from recycling coal fly ash with addition of natural bauxite. V2O5 and AlF3 were used as additives to cause the growth of mullite crystals with various morphologies via an in situ reaction sintering. Dynamic sintering, microstructure and phase evolution of the membrane supports were characterized in detail and open porosity, pore size, gas permeation and mechanical properties were determined. It showed the membrane support with 3 wt.% V2O5 and 4 wt.% AlF3 addition exhibits an open porosity of ∼50%, mechanical strength of 69.8 ± 7.2 MPa, an interlocking microstructure composed of anisotropically grown mullite whiskers with an aspect ratio of 18.2 ± 3.6 at 1300 °C. Addition of more V2O5 lowered the secondary mullitization temperature, resulting in more mullite formation at lower temperatures. The fabricated membrane supports feature high porosity without mechanical strength degradation, possible strengthening mechanism of the mullite whiskers was further discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 34, Issue 13, November 2014, Pages 3181–3194
نویسندگان
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