球形/类球形钽粉的制备

Preparation of Spherical or Near Spherical Tantalum Powder

研究了用氢化破碎技术制备球形/类球形钽粉的工艺及钽粉的性能。以二次电子束高温轰击的高纯钽锭为原料,经过氢化吸氢,球磨机磨筛制粉,然后经过脱氢处理,再经气流粉碎机进行气流整形,得到形貌改善的原粉,通过酸水洗除杂,真空热处理及镁还原降氧过程,得到球形/类球形钽粉。这种钽粉由独立的、单一的粉末颗粒组成,钽粉的粒度分布范围集中,D90小,流动性好,氧含量低,可以满足3D打印、喷涂等方面的应用要求。

Preparation of spherical/near spherical tantalum powder by hydrogenation crushing technology and property of tantalum powder are investigated.High-purity tantalum ingot obtained by electron beam is used as raw material.After hydrogenation,ball milling and screening,dehydrogenation,and airflow shaping by jet mill,morphology improved powder is obtained.Spherical/near spherical tantalum powder is produced from the original powder after its being washed by acid to remove impurities,vacuum heat treatment and magnesium reduction to reduce oxygen content.This tantalum powder is composed of independent and single powder particles with concentrated distribution range of particle size,low D90,good flow ability,and low oxygen content,which can meet the application requirements of 3 Dprinting and spraying.