γ-AlOOH nanocrystaline with width of 10-30nm, length of 100-300nm and aspect ratio of 5-15 were prepared under hydrothermal condition by using aluminum chloride and sodium hydroxide as starting materials. Because of high proportion surface hydroxyl, the thermal decomposition of γ-AlOOH nanocrystalline demonstrates different features, and desorption of surface hydroxyl or chemisorbed water should be treated as separate stage. The thermal decomposition of γ-AlOOH nanocrystalline should be divided to four stages: 1) desorption of physisorbed water; 2) desorption of chemisorbed water; 3) desorption of molecular water and conversion into transition alumina; 4) desorption of residual hydroxyl in transition alumina. And the activation energies of the four stages are -1.21,-16.57,-167.62 and -7.61kJ/mol, respectively.
YANG Qi
,
HU Wen-Bin
. Thermal Decomposition Kinetics of γ-AlOOH Nanocrystalline Prepared by Hydrothermal Method[J]. Journal of Inorganic Materials, 2010
, 25(1)
: 96
-100
.
DOI: 10.3724/SP.J.1077.2010.00096
［1］Biamino S, Fino P, Pavese M, et al. Ceram. Int., 2006, 32(5): 509-513.
［2］O Y T, Kim S W, Shin D C. Colloids and Surfaces A: Physicochem. Eng. Aspects, 2008, 313-314: 415-418.
［3］Mazloumi M, Arami H, Khalifehzadeh R, et al. Mater. Res. Bull., 2007, 42(6): 1004-1009.
［4］Sharifi E M, Karimzadeh F, Enayati M H. J. Alloy. Compd., 2009, 482(1/2): 110-113.
［5］Rico A, Rodriguez J, Otero E, et al. Wear, 2009, 267(5-8): 1191-1197.
［6］Hou H W, Xie Y, Yang Q, et al. Nanotechnology, 2005, 16(6): 741-745.
［7］Li Y Y, Liu J P, Jia Z J. Mater. Lett., 2006, 60(29/30): 3586-3590.
［8］Chen X Y, Lee S W. Chem. Phys. Lett., 2007, 438(4/5/6): 279-284.
［9］Okada K, Nagashima T, Kameshima Y, et al. J. Colloid. Interf. Sci., 2002, 253(2): 308-314.
［10］Tsukada T, Segawa H, Yasumori A, et al. J. Mater. Chem., 1999, 9(2): 549-553.
［11］Zeng W M, Gao L, Guo J K. Nanostructured Materials. 1998, 10(4): 543-550.
［12］Ramanathan S, Roy S K, Bhat R, et al. J. Alloy. Compd., 1996, 243(1/2): 39-44.
［13］Sarikaya Y, Sevin ì, Akin M. Powder Technol., 2001, 116(1): 109-114.
［14］冯仰婕, 陈 炜, 邹文樵.华东化工学院学报, 1991, 17(5): 591-599.
［15］景殿策, 王宝和, 张 伟,等. 中国粉体技术, 2006，12(5): 24-27.
