热等离子制备球形纳微钨粉及烧结性能和应用研究进展

摘要

Spherical tungsten powder is significantly important to develop high value products. The thermal plasma technology is an essential method to fabricate spherical powders. This paper reviews the preparation of nano or micron sized spherical tungsten powders by using thermal plasma technology. The sintering behavior of spherical powders and research advances of spherical tungsten powders in filter, electron and composites materials are focused. It is also pointed out that spherical tungsten powder has a promising future due to its unique morphology.%球形钨粉对于开发高附加值的产品具有十分重要的意义.热等离子技术是制备球形钨粉的有效手段.文章综述了热等离子制备球形纳微钨粉及其烧结性能,等离子球化得到的球形微米钨粉具有各向同性、堆积密度大等特点,有助于得到孔隙均匀贯通的多孔钨基体;等离子制备得到的近球形纳米钨粉分散性好、具有较高的烧结活性且特殊的形貌对晶粒的生长表现出较好的抑制作用.最后总结了球形钨粉在过滤材料、电子材料以及复合材料等领域的应用研究进展,球形钨粉因其特殊的形貌在上述领域具有极其广阔的应用前景.