کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9676103 | 1454114 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Formation of spherical hollow silica particles from sodium silicate solution by ultrasonic spray pyrolysis method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The synthesis of spherical hollow silica particles from sodium silicate solution with boric acid or urea as an additive was carried out by ultrasonic spray pyrolysis method. This work dealt with the effect of four parameters (boric acid, urea, feed rate of reactant, and reaction temperature) on particle size and standard deviation. As a result, the mean particle size and standard deviation decreased with increasing of all parameters except urea. In addition, silica particles with a variety of morphologies were prepared by varying the amount of boric acid and urea. Spherical particles with a smooth surface were prepared at the small concentration of boric acid (0.13-0.18 mole lâ1) without urea. On the other hand, as the concentration increased (0.40-0.48 mole lâ1), the surface of particles became rough and porous condition. In addition, when a small amount of urea (0.07-0.15 mole lâ1) was used, the spherical hollow silica particles were obtained. However, as the concentration increased (0.40-0.71 mole lâ1), broken hollow silica particles with broad particle size distribution were synthesized.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 254, Issues 1â3, 10 March 2005, Pages 193-198
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 254, Issues 1â3, 10 March 2005, Pages 193-198
نویسندگان
Ki Do Kim, Kwan Young Choi, Ji Won Yang,