公开(公告)号：US11534830B2

公开(公告)日：2022-12-27

申请号：US16958150

申请日：2017-12-27

Applicant: NINGXIA ORIENT TANTALUM INDUSTRY CO., LTD.

Inventor： Haiyan Ma ,  Hui Li ,  Guoqing Luo ,  Yuewei Cheng ,  Chunxia Zhao ,  Xueqing Chen ,  Zhidao Wang ,  Fukun Lin ,  Guoqi Yang ,  Ning Wang ,  Yinghui Ma ,  Yanjie Wang ,  Lijun Li ,  Honggang Zhang

IPC: B22F9/20 ,  B22F3/10 ,  B22F9/04 ,  B22F1/05 ,  B22F1/142 ,  H01G9/042 ,  C22C1/04 ,  B22F9/24 ,  C22C27/02 ,  H01G9/052

Abstract: A tantalum powder, a tantalum powder compact, a tantalum powder sintered body, a tantalum anode, an electrolytic capacitor and a preparation method for tantalum powder. The tantalum powder contains boron element, and the tantalum powder has a specific surface area of greater than or equal to 4 m2/g; the ratio of the boron content of the tantalum powder to the specific surface area of the tantalum powder is 2˜16; the boron content is measured in weight ppm, and the specific surface area is measured in m2/g; Powder that can pass through a ρ-mesh screen in the tantalum powder accounts for over 85% of the total weight of the tantalum powder, where ρ=150˜170; and the tantalum powder with high CV has a low leakage current and dielectric loss, and good moldability.