粒径
材料科学
粒子(生态学)
化学工程
溶胶凝胶
原材料
无定形二氧化硅
催化作用
纳米技术
化学
有机化学
海洋学
地质学
工程类
作者
Yu Qiu,Shu Chun Hu,Jing Zhai,Zhi Jian Lin,Wen Feng Liu,Xiao Lang Chen,Jing Cui
出处
期刊:Advanced Materials Research
日期:2013-09-01
卷期号:787: 52-57
标识
DOI:10.4028/www.scientific.net/amr.787.52
摘要
Silica sphere has wide applications not only in the field of physical chemistry dealing with dynamic behavior and stability of particulate systems, but also in industries including catalysts, ceramics, pigments, pharmacy, etc. However, the control on the particle size is a key factor in the preparation process of silica sphere. In this paper, silica sphere with uniform sphere morphology and amorphous structure was prepared by a sol-gel method, and the control of particle size was emphatically studied. The results showed that the particle size of the as-prepared silica sphere was obviously influenced by the raw materials concentration. The average size of the product increased from 0.66 μm to 0.90 μm when ethanol concentration increased from 7.14M to 9.55M, increased from 0.50 μm to 0.90 μm with the increase of ammonia concentration in the range of 1.88M to 2.36M, and increased from 0.47 to 0.90 μm while tetraethoxysilane concentration increased from 0.08M to 0.11M. Further study indicated that the silica particle size was also influenced by reaction temperature, it increased with the increase of temperature from 26°C to 28°C, and decreased with the further increase of temperature in the scope of 28°C to 32°C.
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