Preparation of Nano-Al2O3 Particles via H2/Air Flame Synthesis and Their Dispersion Performance
DING Hong-qiu， HU Yan-jie LI Chun-zhong
School of Materials Science and Engineering, East China University of Science & Technology School of Materials Science and Engineering，East China University of Science and Technology Key Laboratory For Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology
Abstract： Nano-Al2O3 particles were prepared via H2/air flame synthesis in a multi-jet reactor with anhydrous AlCl3 as precursor, the morphology, structure, crystallinity, size and specific surface area of the prepared nanoparticles were investigated, and the influences of flame configuration and maximum temperature in the reaction zone on their properties characterized. The results showed that the size of particles increased with the flame temperature increasing, and their morphology changed from irregular chain-like aggregates to well dispersed spherical nanoparticles. At the same time, a simple γ-phase was gradually transformed to δ and δ* phases. Dispersion of nano-Al2O3 particles had strong stability. The growth mechanism of particles and aggregates at rapid high-temperature reaction was discussed. The morphology and particle size of prepared nanoparticles depended on the competition among the key influential factors.
丁宏秋 胡彦杰 李春忠. 氢氧焰燃烧制备纳米Al2O3颗粒及其分散性能[J]. , 2011, 11(1): 137-142.
DING Hong-qiu; HU Yan-jie LI Chun-zhong. Preparation of Nano-Al2O3 Particles via H2/Air Flame Synthesis and Their Dispersion Performance. , 2011, 11(1): 137-142.