Zn元素对直接氮化法制备AlN粉体的影响  

Effect of Additive Zn Element on the Synthesis of AlN Powders by Direct Nitridation

作　　者：张耀辉[1] 王群[1] 瞿志学[1] 汤云晖[1] 武彤[2] 

机构地区：[1]北京工业大学,北京100124 [2]中国计量科学研究院,北京100013

出　　处：《稀有金属材料与工程》2014年第7期1727-1731,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51202006);新型陶瓷与精细工艺国家重点实验室开放基金

摘　　要：为解决直接氮化法制备AlN粉体过程中存在的问题,采用具有高饱和蒸气压的Zn元素作为原料铝合金的合金元素,研究了Zn元素对Al-Zn以及Al-Mg-Zn合金直接氮化制备AlN粉体的影响。结果表明:Zn元素的挥发可以在反应初期破坏合金熔体氮化形成的氮化膜,避免熔体结块,提高转化率;另一方面,试验及热力学分析表明Zn元素的脱氧作用较差,而Mg元素可以在氮化过程中脱去气氛中的氧,避免Al2O3的形成。因此,采用Al-Mg-Zn三元合金进行直接氮化能够得到低含氧量、低金属杂质残留的纯相AlN。To solve the problems during the process of direct nitridation for AlN powders synthesis, Zn element with a high saturated vapor pressure was used as alloy element of starting materials, and the effect of additive Zn element on the synthesis of AlN for Al-Zn and Al-Mg-Zn systems was investigated. The results show that the volatilization of Zn can destroy the nitrided layer on the surface of alloy melt to prevent the agglomeration and improve the productive rate of AlN. On the other hand, Zn element has been proved not to be a good deoxidizer as Mg element to avoid the formation of Al203. Thus, Al-Mg-Zn alloy is considered as a better starting material for the direct nitridation method to obtain pure AlN powders with lower oxygen and metal residues.

关 键 词：氮化铝 含锌铝合金 直接氮化 

分 类 号：TQ174[化学工程—陶瓷工业]