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出 处:《中国有色金属学报》2008年第E01期139-142,共4页The Chinese Journal of Nonferrous Metals
基 金:国家重点基础研究发展计划资助项目(2005CB623702);国家自然科学基金资助项目(20476107)
摘 要:分别采用粒度分布测试仪、X射线衍射仪及扫描电镜测定和观察添加1.2×10^-2mol/L对甲基苯甲酸后氢氧化铝晶体的粒度分布、晶型及晶体初期形貌;用Materials Studio Dmol^3模块中的GGA-PW91基组计算对甲基苯甲酸与氢氧化铝(001)面结合前后的态密度、总能量、键合能及费米能级。结果表明,添加1.2×10^-2mol/L对甲基苯甲酸后,与空白相比,产品氢氧化铝的粒径基本不变,晶型不变,初期形貌发生了较大的变化;对甲基苯甲酸不易吸附于氢氧化铝(001)面,不是通过吸附在(001)面来抑制分解的。The particle size distribution(PSD), crystal structure and initial microvisage were determined and observed separately by the particle size distribution apparatus, X-ray diffractometer and scanning electron microscope. The fore-and-aft density of state, total energy, binding energy and Fermi energy level after the adsorption of p-toluic acid on the surface (001) of Al(OH)^3 were calculated by the GGA-PW91 in Module-Dmol^3 of Materials Studio. The results show that the particle size distribution of Al(OH)3 keeps basically invariable; the crystal structure of Al(OH)3 is unchanged; but the initial microvisage of Al(OH)3 changes greatly after the p-toluic acid is charged. The p-toluic acid can not easily be adsorbed on the (001) surface of Al(OH)3, thus, it does not inhibit Al(OH)3 crystallization through the adsorption on the (001) surface.
分 类 号:TF111.34[冶金工程—冶金物理化学] TF803.22
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