Title:
TANTALUM POWDER PRODUCTION METHOD AND TANTALUM POWDER OBTAINED THEREBY
Document Type and Number:
WIPO Patent Application WO/2023/109172
Kind Code:
A1
Abstract:
A tantalum powder production method and tantalum powder obtained thereby. The method comprises the following specific steps: (1) uniformly mixing a tantalum powder raw material with magnesium metal and at least one halide selected from alkali metal or alkaline earth metal, putting the mixture into a container, and placing the container in a heating furnace; (2) in inert gas, increasing the temperature of the heating furnace to 600-1200°C, and keeping the temperature for 1-4 h; (3) after the end of temperature keeping, adjusting the temperature of the heating furnace to 600-800°C, evacuating the heating furnace to 10 Pa or below, and keeping negative pressure for 1-10 h so as to separate out excess metal; (4) then, increasing the temperature of the heating furnace to 750-1200°C in inert gas, keeping the temperature for 1-6 h, and sintering the tantalum powder subjected to oxygen reduction in a molten salt; (5) cooling to room temperature, and carrying out passivation treatment to obtain a mixed material containing the halide and the tantalum powder; and (6) washing, pickling, filtering and drying the obtained mixed material to separate out the tantalum powder.
Inventors:
CHENG YUEWEI (CN)
LIANG HONGYUAN (CN)
GUO SHUN (CN)
ZHENG JINFENG (CN)
MA HAIYAN (CN)
ZUO JINGYI (CN)
ZHANG LI (CN)
LIU TONG (CN)
QIN HONGJIE (CN)
WANG YING (CN)
LIANG HONGYUAN (CN)
GUO SHUN (CN)
ZHENG JINFENG (CN)
MA HAIYAN (CN)
ZUO JINGYI (CN)
ZHANG LI (CN)
LIU TONG (CN)
QIN HONGJIE (CN)
WANG YING (CN)
Application Number:
PCT/CN2022/114375
Publication Date:
June 22, 2023
Filing Date:
August 24, 2022
Export Citation:
Assignee:
NINGXIA ORIENT TANTALUM IND CO LTD (CN)
International Classes:
B22F1/145; B22F1/142; H01G9/042
Foreign References:
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Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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