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	Modeling crystallization kinetics: Synthesis of the high Ti/Si silicotitanium molecular sieve
	Yu Bo ; Wen Mingfen ; Chen Jing ; Zhu Jianxin
	2010-05-10 ; 2010-05-10
关键词	cesium removal pore tunnel framework compound hydrothermal synthesis crystallization Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering
中文摘要	The synthetic technology of the novel high Ti/Si pore tunnel framework compound Na4Ti4Si3O10 (NaTS) for cesium removal through sol-gel hydrothermal method was studied systematically. Also, the effects of the temperature, reaction time and various Ti/Si on the properties of the product were discussed. The results show that the reaction is endothermic, which suggests that the increment of the temperature contributes more titanium in the framework of NaTS. Under the condition of 200 degrees C, the product is well-crystallized regular tetragonal particle with an average grain size of about 20 nm and the ratio of Ti/Si is 1.33, the cesium adsorption can be up to 36500 mL/g. The crystallization of NaTS, which is composed of silicate dissolution and condensation reaction, nucleation, crystal growth, and gel dissolution process, belongs to the liquid phase transformation mechanism. The crystallization kinetics model for a spontaneous nucleation system of NaTS had been established, considering the spontaneous nucleation and crystal growth. By Runge-Kutta and simplex methods, the crystal growth constant of NaT is calculated to be only 5.6 x 10(-7). It can be concluded that the key increasing the synthesis of NaTS is to improve the speed of crystal growth.
语种	中文 ; 中文
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH ; SHAANXI ; C/O RARE METAL MATERIAL ENGINEERING PRESS, PO BOX 51, XIAN, SHAANXI 710016, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/22963]
专题	清华大学
推荐引用方式 GB/T 7714	Yu Bo,Wen Mingfen,Chen Jing,et al. Modeling crystallization kinetics: Synthesis of the high Ti/Si silicotitanium molecular sieve[J],2010, 2010.
APA	Yu Bo,Wen Mingfen,Chen Jing,&Zhu Jianxin.(2010).Modeling crystallization kinetics: Synthesis of the high Ti/Si silicotitanium molecular sieve..
MLA	Yu Bo,et al."Modeling crystallization kinetics: Synthesis of the high Ti/Si silicotitanium molecular sieve".(2010).

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