TANTALUM POWDER AND PREPARATION METHOD THEREFOR - NINGXIA ORIENT TANTALUM IND CO LTD

Title:

TANTALUM POWDER AND PREPARATION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2019/127200

Kind Code:

A1

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 specific surface area of the tantalum powder is greater than or equal to 4m 2/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 calculated in mass ppm, and the specific surface area is calculated in m 2/g; The powder passing through a ρ-mesh sieve in the tantalum powder accounts for over 85% of the total mass of the tantalum powder, where ρ=150~170; and the tantalum powder with high CV has a low leakage current and loss, and good moldability.

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Inventors:

MA HAIYAN (CN)
LI HUI (CN)
LUO GUOQING (CN)
CHENG YUEWEI (CN)
ZHAO CHUNXIA (CN)
CHEN XUEQING (CN)
WANG ZHIDAO (CN)
LIN FUKUN (CN)
YANG GUOQI (CN)
WANG NING (CN)
MA YINGHUI (CN)
WANG YANJIE (CN)
LI LIJUN (CN)
ZHANG HONGGANG (CN)

Application Number:

PCT/CN2017/119324

Publication Date:

July 04, 2019

Filing Date:

December 28, 2017

Export Citation:

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Assignee:

NINGXIA ORIENT TANTALUM IND CO LTD (CN)

International Classes:

B22F1/05; B22F1/142; B22F1/145; B22F5/00; B22F9/00

Foreign References:

CN1437517A	2003-08-20
CN1247575A	2000-03-15
US4645533A	1987-02-24
CN102806345A	2012-12-05
CN104858436A	2015-08-26
CN1449316A	2003-10-15
CN103601242A	2014-02-26

Other References: