Ri-ya JIN(晋日亚), Shuang-qi HU(胡双启), Ying-xin TAN(谭迎新)
（College of Chemical & Environmental Engineering, North University of China, Taiyuan 030051, China）
Abstract-This paper discussed impact of temperature on the size distribution in preparing ultrafine silica from rice husk. The samples prepared were analyzed with infrared spectrum, and the relation between the particle size and intensity of characteristic absorption peak of IR at center around 1 100 cm-1 was disscussed with the baseline method. Results show that when the temperature is 650 ℃ and roasting time is 11 h, at optimal reaction conditions, the size distribution of the ultrafine silica powder prepared is relatively concentrated, and the average particle size is 199.5 nm. Moreover, the characteristic absorption band of IR is broadening gradually along with particle size decreasing.
Key words-rice husk; ultrafine powder; SiO2; infrared spectrum
Manuscript Number: 1674-8042(2011)03-0226-04
doi: 10.3969/j.issn.1674-8042.2011.03.006
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