Tantalum powder and preparation method therefor

US11534830B2 · kind B2 · utility

Assignee

• NINGXIA ORIENT TANTALUM INDUSTRY CO., LTD · CN

Inventors

• Haiyan Ma · Wenhe, CN
• Hui Li · Gaozhuang, CN
• Guoqing Luo · Xinmin, CN
• Yuewei Cheng · Gaozhuang, CN
• Chunxia Zhao · 红钢城街道, CN
• Xueqing Chen · Xinmin, CN
• Zhidao Wang · Gaozhuang, CN
• Fukun Lin · Xinmin, CN
• Guoqi Yang · Gaozhuang, CN
• Ning Wang · 红钢城街道, CN
• Yinghui Ma · Chengdu, CN
• Yanjie Wang · San Jose, US
• Lijun Li · Qingdao, CN
• Honggang Zhang · Beijing, CN

Key dates

• Filing date: Dec 27, 2017
• Grant date: Dec 27, 2022
• Expiry date: Dec 27, 2037

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2998/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

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.