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Mg_Al水滑石的水热合成与晶面选择性生长.pdf

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29 2 硅 酸 盐 通 报 Vol. 29 No. 2 2010 4 BULLETIN OF THE CH INESE CERAM IC SOC IETY April, 2010 M gA l 于洪波, 徐 冰, 姜 楠, 高 宏 (, , 11602 ) : M gOA l( OH ) , (M gA l LDH s), 3 XRDSEM , , , , LDH s, ; a c , [ 110][ 003] : M gA l; ; ; : TB321 : A : 2010) Hydrothermal SynthesisM gA lLayered DoubleHydroxides and Selectivity of Crystal Growth Direction YUH ong bo, X U B ing, JIAN G Nan, GAOH ong ( L iaoning Key Laboratory for Fabrication and Application of Superfine Inorganic Pow ders, Dalian Jiaotong University, Dalian 11602 , China) Abstract: Themagnesiumalum in ium layered double hydroxides (MgA l LDH s) has been successfu lly synthesized by the hydrothermal approach, using M gO, A l ( OH ) 3 as the starting materials. The influences of the reaction cond itions ( including hydrotherm al tmi e and hydrotherm al temperature) on the crystal structure and selectivity of crystal grow th in d ifferent d irections of the productsw ere investigated by Xray diffraction and scann ing electron m icroscopy. It has been shown that w ith increasing the hydrothermal tmi e at the same hydrothermal temperature or increasing the hydrothermal temperature at the same hydrothermal tmi e the crystallization of theLDHs increased and the particle size became larger. The size of the crystallites in direction a w as larger than that in the direction c under all expermi ental conditions. K ey words: MgA l layered double hydroxides; hydrothermal synthesis; selectivity of growth d irection; particle size 1 引

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