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	Morphology "Phase diagram" of the hydrous alumina coating on TiO2 particles during aqueous precipitation
	Wu, Hai-Xia ; Wang, Ting-Jie ; Jin, Yong
	2010-05-07 ; 2010-05-07
关键词	POWDERS WHISKERS HYDRATE Engineering, Chemical
中文摘要	The morphology of the hydrous alumina coating on TiO2 particles from aqueous precipitation at different pHs and temperatures was studied, and a "phase diagram" was obtained. Al-2(SO4)(3) solution was the coating reagent, and NaOH solution was the precipitant reagent. The effect of pH and temperature on the hydrolysis of Al3+, the size and structure of the OH-Al species, and the coating morphology were investigated. Four kinds of coating morphologies were observed: dotted coating, film coating, floccule coating, and flake coating. When the pH was lower than the isoeletric point of the TiO2 particles (pH 4.1), there was dotted coating. When the pH was higher than the isoeletric point and with increasing pH and temperature, the hydrous alumina coating changed from a uniform and continuous amorphous film coating to a loose floccule coating, then to a flake coating.
语种	英语 ; 英语
出版者	AMER CHEMICAL SOC ; WASHINGTON ; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/17628]
专题	清华大学
推荐引用方式 GB/T 7714	Wu, Hai-Xia,Wang, Ting-Jie,Jin, Yong. Morphology "Phase diagram" of the hydrous alumina coating on TiO2 particles during aqueous precipitation[J],2010, 2010.
APA	Wu, Hai-Xia,Wang, Ting-Jie,&Jin, Yong.(2010).Morphology "Phase diagram" of the hydrous alumina coating on TiO2 particles during aqueous precipitation..
MLA	Wu, Hai-Xia,et al."Morphology "Phase diagram" of the hydrous alumina coating on TiO2 particles during aqueous precipitation".(2010).

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