| Al粉直接氮化法的优缺点 |
| 添加时间：2019/11/29 13:59:55 浏览次数： |
| Al粉直接氮化法的优点是原料丰富，成本低廉，工艺简单，没有副反应；但该法的缺点也很明显，在反应初期，铝粉颗粒表面会逐渐生成氮化物膜，使氮气难以进一步渗透，阻碍氮气反应，致使产率较低；又由于铝和氮气之间的反应是强放热反应，速度很快，造成AlN粉体自烧结，形成团聚，使得粉体颗粒粗化。 The advantages of direct nitriding of Al powder are rich raw materials, low cost, simple process and no side reaction. However, the disadvantages of this method are obvious. In the early stage of reaction, nitride film will be gradually formed on the surface of aluminum powder particles, making it difficult for nitrogen to penetrate further, hindering nitrogen reaction, resulting in low yield. In addition, the reaction between aluminum and nitrogen is a strong exothermic reaction, which is very fast, resulting in al The N powder is self sintered and agglomerated to coarsen the particles. |
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