Method for producing metal powder and method for producing metal powder slurry

The described method for producing nickel powder and slurry addresses particle aggregation and flattening issues by using a specific gravity crushing media, resulting in a safer and more efficient process for producing fine nickel powder for multilayer ceramic capacitors.

JP2026023288APending Publication Date: 2026-02-13SUMITOMO METAL MINING CO LTD
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Patent Information

Application Number
JP2024125198
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-07-31
Publication Date
2026-02-13

AI Technical Summary

Technical Problem

Existing methods for producing fine nickel powder for internal electrodes in multilayer ceramic capacitors face challenges such as particle aggregation, inclusion of coarse particles, and the risk of dust explosions, especially when processing particles smaller than 0.2 μm, which complicates the manufacturing process and increases costs.

Method used

A method involving a first drying step followed by washing with water and solid-liquid separation, then crushing with a media-agitating mill using crushing media with a specific gravity of 3.0 to 4.5, followed by a second drying step to produce a metal powder slurry, effectively suppressing particle flattening and reducing coarse particles.

Benefits of technology

The method results in a metal powder and slurry with suppressed flattening, enabling the production of thinner internal electrodes for multilayer ceramic capacitors by minimizing particle flattening and coarse particle content, thus improving manufacturing safety and efficiency.

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Abstract

To provide a method for producing metal powder in which flattening is suppressed, and metal powder slurry in which flattening of metal particles is suppressed.SOLUTION: A method for producing a metal powder, comprising a first drying step of washing a produced metal powder with water and then performing solid-liquid separation, a crushing step of crushing the dried metal powder obtained through the first drying step, a crushing medium, and a solvent using a medium stirring mill to obtain a metal powder slurry, and a second drying step of removing the solvent after the crushing step, wherein the crushing medium has a specific gravity of 3.0 to 4.5.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

  • Supersonic jet mill

    JP1983143853A

  • Production of globular-nickel superfine powder

    JP1992365806A

  • Ultrafine metal powder slurry

    JP2006063441A

  • Manufacturing method of nickel powder

    JP2018178218A