Gibbsite to Boehmite Transformation in Strongly Caustic and Nitrate Environments
作者： Xiaoyi Gong , Zimin Nie , Maoxu Qian , Jun Liu , Larry A. Pederson
DOI: 10.1021/IE020837Y
关键词:
摘要: The transformation of gibbsite to boehmite in strongly caustic solutions was studied using quantitative X-ray diffraction, Fourier transform infrared spectroscopy, and transmission electron microscopy techniques. Under hydrothermal conditions we identified two mechanisms; dehydration in-situ nucleation dissolution nucleation. If the reaction container not completely sealed, followed by preferred mechanism. Boehmite produced fibrous particles within amorphous matrix decomposed particles, which exhibited a poorly crystalline structure smaller size than initial particles. In closed environment, mechanism along (001) planes. final were morphologically related could be many times larger
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