Synthesis of Nano-Size AlN Powders by Carbothermal Reduction from Plasma-Assisted Ball Milling Precursor  

作　　者：刘志杰 王文春 杨德正 王森 戴乐阳 

机构地区：[1]Key Lab of Materials Modification (Dalian University of Technology),Ministry of Education [2]Marine Engineering Institute, Jimei University

出　　处：《Plasma Science and Technology》2016年第7期759-763,共5页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(No.51177008)

摘　　要：Nano-size aluminum nitride （A1N） powders have been successfully synthesized with a high efficiency method through annealing from milling assisted by discharge plasma （p-milling） alumina （Al2O3） precursors. The characterization of the p-milling Al2O3 powders and the synthesized AlN are investigated. Compared to conventional ball milling （c-milling）, it can be found that the precursors by p-milling have a finer grain size with a higher specific surface area, which lead to a faster reaction efficiency and higher conversion to A1N at lower temperatures. The activation energy of p-milling Al2O3 is found to be 371.5 kJ/mol, a value that is much less than the reported value of the unmilled and the conventional milled Al2O3. Meanwhile, the synthesized AlN powders have unique features, such as an irregular lamp-like morphology with uniform particle distribution and fine average particle size. The results are attributed to the unique synergistic effect of p-milling, which is the effect of deformation, fracture, and cold welding of Al2O3 powders resulting from ball milling, that will be enhanced due to the introduction of discharge plasma.Nano-size aluminum nitride （A1N） powders have been successfully synthesized with a high efficiency method through annealing from milling assisted by discharge plasma （p-milling） alumina （Al2O3） precursors. The characterization of the p-milling Al2O3 powders and the synthesized AlN are investigated. Compared to conventional ball milling （c-milling）, it can be found that the precursors by p-milling have a finer grain size with a higher specific surface area, which lead to a faster reaction efficiency and higher conversion to A1N at lower temperatures. The activation energy of p-milling Al2O3 is found to be 371.5 kJ/mol, a value that is much less than the reported value of the unmilled and the conventional milled Al2O3. Meanwhile, the synthesized AlN powders have unique features, such as an irregular lamp-like morphology with uniform particle distribution and fine average particle size. The results are attributed to the unique synergistic effect of p-milling, which is the effect of deformation, fracture, and cold welding of Al2O3 powders resulting from ball milling, that will be enhanced due to the introduction of discharge plasma.

关 键 词：aluminum nitride  ball milling  thermal temperature plasma  alumina 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O539[理学—等离子体物理]