高温固相反应工艺制备AlON粉体
收稿日期: 2009-03-02
修回日期: 2009-04-24
网络出版日期: 2010-04-22
Preparation of Aluminum Oxynitride Powders by Solid-State Reaction
Received date: 2009-03-02
Revised date: 2009-04-24
Online published: 2010-04-22
关键词: 氮氧化铝(AlON); 粉体; 固相反应; 反应动力学; 反应机理
刘学建 , 李会利 , 黄政仁 , 王士维 , 江东亮 . 高温固相反应工艺制备AlON粉体[J]. 无机材料学报, 2009 , 24(6) : 1159 -1162 . DOI: 10.3724/SP.J.1077.2009.01159
Aluminum oxynitride (AlON) powders were prepared by solid-state reaction processing with α-Al2O3 and AlN as starting materials in nitrogen atmosphere. The effects of reactive temperature, holding time, and Al2O3/AlN ratio on the resultant phase compositions were investigated systematically by XRD. In addition, the reactive mechanism was tentatively explored. The experimental results indicate that the solid-state reaction for AlON is mostly controlled by thermodynamics and the dynamic factors are also important to the reaction. The reaction can not be thoroughly processed neither only by prolonging holding time at lower reactive temperature nor only by increasing reactive temperature in a shorter holding time. Both reactive temperature and holding time are crucial to the reactive progress. By diffusing AlN into Al2O3 lattice, O-riched AlON formations begin between 1600℃ and 1650℃, and finish at about 1750℃. Above 1800℃, O-riched AlON converts into Nriched AlON by further diffusing remnant AlN into Al2O3 lattice. Pure AlON is prepared by the solidstate reaction of Al2O3 and AlN at 1950℃ in nitrogen atmosphere for 4h.
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