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Hydrothermal synthesis of boehmites with various particle sizes and transition to α-Al_2O_3 powders by calcination
Li SH(黎少华); Yuan FL(袁方利); Hu P(胡鹏); Ke JJ(柯家骏)
2005
Source Publication广东有色金属学报
IssueZ1Pages:581-585
AbstractBoehmite powders with various particle sizes have been prepared by hydrothermal method and the α-Al_2O_3 powders yielded after subsequent calcination have been studied. Dispersive crystalline boehmite powders of 30-100 nm, 0.4-0.6μm and 1μm in size were obtained respectively by changing the hydrothermal precursors and the pH value of hydrothermal slurry. Calcination of boehmite powders of 30-100 nm at 1250℃ for 1h resulted in the formation of single-phase α-Al_2O_3 , and the products consisted of vermicular particles. The boehmite powders of 0.4-0.6μm were also fully converted to α-Al_2O_3 at 1250℃, and the products consisted of plate-like particles with the same size of 0.4-0.6μm. The boehmite powders of 1μm calcined at 1350℃ for 2h were still composed of a little proportions of transition aluminas besides α-Al_2O_3, and the particles sintered severely. The reaction processes for the formation of crystalline boehmites under hydrothermal conditions and α-Al_2O_3 powders during calcination have been discussed.
KeywordHydrothermal Boehmite Α-al_2o_3 Powder Particle Size
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6974
Collection研究所(批量导入)
Recommended Citation
GB/T 7714
Li SH,Yuan FL,Hu P,et al. Hydrothermal synthesis of boehmites with various particle sizes and transition to α-Al_2O_3 powders by calcination[J]. 广东有色金属学报,2005(Z1):581-585.
APA 黎少华,袁方利,胡鹏,&柯家骏.(2005).Hydrothermal synthesis of boehmites with various particle sizes and transition to α-Al_2O_3 powders by calcination.广东有色金属学报(Z1),581-585.
MLA 黎少华,et al."Hydrothermal synthesis of boehmites with various particle sizes and transition to α-Al_2O_3 powders by calcination".广东有色金属学报 .Z1(2005):581-585.
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