The Cu core ball contains a Cu ball and a solder layer for covering a surface of the Cu ball. The Cu ball contains at least one element selected from Fe, Ag, and Ni in a total amount of 5.0 or more to 50.0 ppm by mass or lower, S in an amount of 0 or more to 1.0 ppm by mass or lower, P in an amount of 0 or more to less than 3.0 ppm by mass, and remainder of Cu and inevitable impurities. The Cu ball contains purity which is 99.995% or higher and 99.9995% by mass or lower, and sphericity which is 0.95 or higher. The solder layer includes Ag in an amount of more than 0 to 4.0% by mass or less, Cu in an amount of more than 0 to 3.0% by mass or less, and remainder of Sn.

Provided is a method of manufacturing a metal hybrid heat-dissipating material, the method including (a) preparing spherical metal powder and flake graphite powder having an aspect ratio greater than 1, (b) preparing mixture powder by inserting only the spherical metal powder and the flake graphite powder into a container and then mixing the metal powder and the graphite powder by using a multi-axial mixing method for rotating the container about two or more different rotation axes, (c) manufacturing a green compact by pressing the mixture powder, and (d) sintering the green compact.

A method and a plant for the production of a powdery starting material, which is provided for the manufacture of rare earth magnets, are disclosed. First of all, at least one magnetic material, which is comminuted into a powdery intermediate product with a possibly increased concentration of impurities, and/or at least one alloy including rare earth metal are provided, which includes a low concentration of impurities. A classification of the powdery intermediate product to at least one criterion takes place subsequently, wherein, for the classification of the powdery intermediate product with the increased concentration of impurities, at least one dynamic classifier is provided, which divides the powdery intermediate product with impurities into at least two fractions based on the at least one criterion, wherein at least a high concentration of impurities accumulates in a first fraction and no impurities or at least a lower concentration of impurities than in the case of the first fraction accumulate in a second fraction, and wherein the fraction without impurities or with a low concentration of impurities forms the starting material for the manufacture of rare earth magnets.

A novel silver-coated copper powder, particularly a silver-coated copper powder particle having a dendritic shape, having increased electrical conductivity with no need to increase the silver content is provided. The silver-coated copper powder is composed of a silver-coated copper particle coated with a silver layer containing silver or a silver alloy, including a silver-coated copper particle having a dendritic shape, containing nitrogen (N) in the silver layer, and having a nitrogen (N) content of 0.2 to 10.0 parts by mass with respect to 100 parts by mass of the silver content.

A method for heat treating a superalloy component includes heating a superalloy component to a first temperature, cooling the superalloy from the first temperature to a second temperature at a first cooling rate in a furnace, and cooling the superalloy component from the second temperature to a final temperature at a second cooling rate. The second cooling rate is higher than the first cooling rate.

Obtaining a powder for metallurgy capable of improving a filling rate in a mold or on a table in powder metallurgy. The powder for metallurgy includes a plurality of secondary particles obtained by combining a plurality of primary particles with a binder. The characteristics of the powder for metallurgy is any one of that the plurality of primary particles includes first primary particles and second primary particles having different shapes from each other, that the second primary particle enters a gap between the first primary particles, that the plurality of primary particles includes first primary particles and second primary particles having different peaks of particle sizes from each other in a particle size distribution, or that the plurality of secondary particles includes first secondary particles and second secondary particles having different peaks of particle sizes from each other in a particle size distribution.

Obtaining a powder for metallurgy capable of improving a filling rate in a mold or on a table in powder metallurgy. The powder for metallurgy includes a plurality of secondary particles obtained by combining a plurality of primary particles with a binder. The characteristics of the powder for metallurgy is any one of that the plurality of primary particles includes first primary particles and second primary particles having different shapes from each other, that the second primary particle enters a gap between the first primary particles, that the plurality of primary particles includes first primary particles and second primary particles having different peaks of particle sizes from each other in a particle size distribution, or that the plurality of secondary particles includes first secondary particles and second secondary particles having different peaks of particle sizes from each other in a particle size distribution.

The present invention relates to ear-of-rice-shaped copper particles. The technical gist thereof is a method of manufacturing ear-of-rice-shaped copper particles, ear-of-rice-shaped copper particles manufactured thereby, and a conductive paste using the same. The method includes a first step of preparing a copper precursor solution, a second step of adjusting the pH of the copper precursor solution, a third step of adding a zinc powder to the pH-adjusted copper precursor solution, a fourth step of synthesizing the ear-of-rice-shaped copper particles by stirring the copper precursor solution, to which the zinc powder is added, for a predetermined time, and a fifth step of separating, washing, and then drying the synthesized ear-of-rice-shaped copper particles.

A negative electrode for an alkaline battery cell which includes zinc-based particles, wherein less than 20% of the zinc-based particles, by weight relative to the total zinc in the electrode, have a particle size of greater than about 150 micrometers, is provided. An alkaline electrochemical cell that includes the negative electrode and a method for reducing the gassing of the electrochemical cell is also provided.

To provide a production method capable of enhancing the magnetic properties, particularly, the coercive force, of a SmFeN-based rare earth magnet and a production apparatus used therefor.

A method for producing a rare earth magnet, comprising mixing a magnetic raw material powder containing Sm, Fe and N with a modifier powder containing metallic Zn to obtain a mixed powder, filling the mixed powder into a molding die to obtain a filled product, melting at least a part of the modifier powder in the filled product while applying a pressure of 20 MPa or less to the filled product or without applying a pressure to obtain an intermediate molded product, and subjecting the intermediate molded product to liquid phase sintering at a pressure of 20 MPa or more to obtain a sintered body; and a production apparatus used therefor.