Metal powder, method for producing the same, conductive paste using the same, and monolithic ceramic electronic component
AssigneeMurata Manufacturing Co., Ltd.
InventorsTadasu Hosokura, Atsuyoshi Maeda
Life of this patent
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Abstract
A metal powder is formed by the steps of preparing a reducing agent solution, preparing a mixed metallic salt solution by dissolving a nickel salt and a copper salt in a solvent, and mixing the reducing agent solution and the mixed metallic salt solution so that the copper salt is reduced to precipitate copper particle nuclei and then the nickel salt is reduced to precipitate nickel around the copper particle nuclei. A metal power produced by this production method, a conductive paste containing the metal powder and a monolithic ceramic electronic component in which internal electrodes are formed using the conductive paste are also disclosed.
Claims18
A Ni powder produced by a method comprising:
- providing a reducing agent solution;
- providing a mixed metallic salt solution comprising a nickel salt and a copper salt dissolved in a solvent;
- and
- mixing the reducing agent solution and the mixed metallic salt solution such that the copper salt is reduced to precipitate copper particle nuclei and then the nickel salt is reduced to precipitate nickel around the copper particle nuclei.
A Ni powder comprising particles of nickel having copper particulate nuclei.
A method of preparing a conductive paste comprising:
- providing a reducing agent solution;
- providing a mixed metallic salt solution comprising a nickel salt and a copper salt dissolved in a solvent, wherein the copper content is in the range of about 4.6×10−7 to 4.62 percent by weight relative to the weight of nickel;
- mixing the reducing agent solution and the mixed metallic salt solution such that the copper salt is reduced to precipitate copper particle nuclei and then the nickel salt is reduced to precipitate nickel around the copper particle nuclei;
- and
- mixing the particles of the nickel having the copper particle nuclei with a vehicle.
In a method of producing a monolithic ceramic electronic component comprising
- providing a reducing agent solution;
- providing a mixed metallic salt solution comprising a nickel salt and a copper salt dissolved in a solvent, wherein the copper content is in the range of about 4.6×10−7 to 4.62 percent by weight relative to the weight of nickel;
- mixing the reducing agent solution and the mixed metallic salt solution such that the copper salt is reduced to precipitate copper particle nuclei and then the nickel salt is reduced to precipitate nickel around the copper particle nuclei;
- mixing the particles of the nickel having the copper particle nuclei with a vehicle so as to form a conductive paste;
- providing the conductive paste on a ceramic green sheet;
- laminating a plurality of ceramic green sheets including the ceramic green sheet having the conductive paste thereon so as to form a green ceramic laminate;
- and
- firing the green ceramic laminate.
Dependencies are inferred from the claim text.