铝热还原法合成AlON粉体及其热力学分析  

Synthesis of AlON Powder by Aluminothermic Reduction and Its Thermodynamic Analysis

作　　者：王跃忠[1] 卢铁城[1,2] 喻寅[1] 齐建起[1] 文劲松[1] 王海平[1] 肖磊[1] 阳志林[1] 于健[1] 温雅[1] 魏念[1] 

机构地区：[1]四川大学辐射物理及技术教育部重点实验室,四川成都610064 [2]中科院国际材料物理中心,辽宁沈阳110015

出　　处：《稀有金属材料与工程》2009年第A02期48-51,共4页Rare Metal Materials and Engineering

基　　金：国防基础科研基金

摘　　要：以微米级的Al粉和纳米级Al2O3粉为原料,在N2气氛下,通过铝热还原法,进行了AlON粉体的合成。实验表明,在1873～1923K之间,AlON相开始形成,到2023K时得到纯相AlON粉体。通过拟抛物线规则计算得到AlON的摩尔生成吉布斯能,进而算得AlON相形成的转变温度为1887K。热力学分析表明,铝热还原法合成AlON过程中,各物相易受气氛、温度的影响而表现出不同的热力学行为,进而影响合成的纯相AlON的固溶组分。实验结果与理论计算分析相符合。Micro-sized Al powder and nano-sized alumina powder were employed as starting materials, milled together and then calcined in nitrogen atmosphere to synthesize ALON powder by aluminothermic reduction method. The course of AlON synthesis was investigated. The results show that AlON phase was formed at the temperature range of 1873-1923 K. Single phase AlON powder was fabricated at 2023 K for 2 h in nitrogen. Gibbs energy of AION was calculated by a thermodynamic quasi-parabola rule. Consequently, the conversion temperature of AION phase formation was determined as 1887K. According to the thermodynamic analysis, it was concluded that under the effect of temperature and atmosphere, each phase exhibited different thermodynamic behavior in the process of AlON synthesis, which would change the eutectic composition of the resulted single phase AlON powder. The theories coincided with the experimental results in this paper.

关 键 词：氮氧化铝 透明陶瓷粉体 铝热还原 热力学 

分 类 号：TQ174[化学工程—陶瓷工业]