METAL POWDER AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2023/243483

A1

Provided are: a metal powder suitable for an internal electrode for producing highly reliable MLCCs at a high yield; and a method for producing the metal powder.　In this metal powder, 99.5 mass% or more of the metal components is Ni. A ratio S/DPV of the shorter diameter S of metal particles forming the metal powder and the equal volume sphere equivalent diameter DPV of the metal particles is 0.92 or less. The proportion of the metal particles, in which the ratio DPV/DPV50 of the equal volume sphere equivalent diameter DPV and the volume-based median diameter DPV50 is 1.8 or more, is 1.0 vol% or less. The volume-based median diameter DPV50 of the metal particles is 0.08-0.35 μm. Preferably, the S content and the O content per specific surface area of 1 m2/g are 70-600 ppm and 1200-7000 ppm, respectively. This method for producing said metal powder comprises an evaporation step, a reaction step, and a cooling step which are performed consecutively. In the cooling step, a gas that has been cooled is prevented from backflowing to the reaction step, and a cooling gas in an amount of 0.5-5.0 times the mol quantity of the total amount of a reductive gas and an inert gas is used.

SAITO KAN (JP)
YAMANE HIROSHI (JP)
MAKISE TAKANORI (JP)
OKADA ATSUSHI (JP)

PCT/JP2023/020947

December 21, 2023

June 06, 2023

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JFE MINERAL & ALLOY COMPANY LTD (JP)

B22F1/00; B22F1/05; B22F9/28; H01G4/30

JP2000045001A	2000-02-15
JP2004143485A	2004-05-20
JP2004124136A	2004-04-22

OCHIAI Kenichiro (JP)

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