کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8012587 1517160 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Facile fabrication of functional silica aerogel with gradient transmittance and refractive indices via slope-rotation method
ترجمه فارسی عنوان
تولید تکه ای از آلیاژهای سیلیکا کاربردی با بارندگی و شاخص های انکسار شیب با روش شیب صاف
کلمات کلیدی
آماده سازی سل ژل، تراکم گرادیان، مواد متخلخل ضریب شکست، شیب چرخشی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی
Functionally gradient silica aerogels have been applied in many areas with their gradient porosity, refractive indices and acoustical impedance. For the purpose of accurately controlling the process of gradient formation, a new approach called slope-rotation method was proposed. Such a method could benignly fabricate gradient density sol by sloping, rotating and mixing the two different density sols in one-step. Gradient density aerogel was obtained after ethanol supercritical drying. The microstructure and density distribution of aerogels were characterized by nitrogen adsorption, scanning electron microscopy, and X-ray phase contrast. The transmittance and refractive index were tested by UV-visible absorption spectrum and a self-built device. The results indicated that the transmittance and refractive index had been gradient changed with the gradient density. This approach was an effective method for the preparation of gradient density silica aerogels and could be suitable for producing gradient density porous materials derived from a sol-gel process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 228, 1 October 2018, Pages 224-228
نویسندگان
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