TANTALUM POWDER PRODUCTION METHOD AND TANTALUM POWDER OBTAINED THEREBY

• Main Authors: ZUO, Jingyi, LIU, Tong, WANG, Ying, LIANG, Hongyuan, ZHANG, Li, QIN, Hongjie, ZHENG, Jinfeng, GUO, Shun, MA, Haiyan, CHENG, Yuewei
• Format: Patent
• Language: Chinese; English; French
• Published: 22.06.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; CASTING; ELECTRICITY; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

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 contai