A material comprises at least one layer of a plurality of domains, each domain being flattened in a first direction and elongated in a second direction normal to the first direction. The flattened and elongated domains define an anisotropic microstructure that facilitates a magnetic flux flow in the second direction.

A magnetizable abrasive particle. The magnetizable abrasive particle has a ceramic particle having an outer surface; and a continuous metal coating on the outer surface; wherein the core hardness of the ceramic particle is at least 15 GPa; wherein the continuous metal coating comprises a solution phase thermally deposed layer of iron, cobalt or an alloy of iron and cobalt; and wherein the thickness of the continuous metal coating is less than 1000 nm. A method of making the magnetizable abrasive particle is also disclosed.

A metal magnetic powder is constituted by metal magnetic grains that each include: a metal phase where the percentage of Fe at its center part is 98 percent by mass or higher, while the mass percentage of Fe at its contour part is lower than that at the center part; and an oxide film covering the metal phase, so as to inhibit oxidation of Fe contained in the metal phase, despite the high content percentage of Fe in the metal phase.

A metal magnetic powder is constituted by metal magnetic grains that each include: a metal phase where the mass percentage of Fe at its center part is lower than that at its contour part; and an oxide film covering the metal phase so as to allow the magnetic body resistant to magnetic saturation and low in iron loss.

An insulator-coated soft magnetic powder includes core particles each of which includes a base portion containing a soft magnetic material and an oxide film provided on the surface of the base portion and containing an oxide of an element contained in the soft magnetic material, ceramic particles which are provided on the surface of each of the core particles and have an insulating property, and a glass material which is provided on the surface of each of the core particles, has an insulating property, and contains at least one type of phosphorus oxide, bismuth oxide, zinc oxide, boron oxide, tellurium oxide, and silicon oxide as a main component, wherein the ceramic particles are included in a proportion of 100 vol % or more and 500 vol % or less of the glass material.

An insulator-coated soft magnetic powder includes core particles each of which includes a base portion containing a soft magnetic material and an oxide film provided on the surface of the base portion and containing an oxide of an element contained in the soft magnetic material, ceramic particles which are provided on the surface of each of the core particles and have an insulating property, and a glass material which is provided on the surface of each of the core particles, has an insulating property, and contains at least one type of phosphorus oxide, bismuth oxide, zinc oxide, boron oxide, tellurium oxide, and silicon oxide as a main component, wherein the ceramic particles are included in a proportion of 100 vol % or more and 500 vol % or less of the glass material.

The present invention provides a composite magnetic body comprising metal particles containing Fe or Fe and Co as a main component and a resin, wherein an average major axis diameter of the metal particles is 30 to 500 nm, an average of the aspect ratios of the metal particles is 1.5 to 10, and a CV value of the aspect ratios is 0.40 or less.

The present invention relates to a magnetic particle having a high-reflective protective membrane and a method for producing same, especially wherein the magnetic particle includes a magnetic core, a shell formed on the magnetic core, and a high-reflective protective membrane formed on the shell, and the high-reflective protective membrane has low-refractive-index and high-refractive-index membranes. The magnetic particle has advantages that have high brightness and prevent the shell from being damaged by friction with a filler and pressure between rollers during a dispersion step of an ink-making process. Also, the magnetic particle is used for different colored inks, general paint, particulate pigments for vehicles, pigments for cosmetics, catalyst paint, and especially anti-forgery inks, etc., and has advantages that are durable and express colors that existing magnetic pigments fail to.

A composite soft magnetic material having low magnetostriction and high magnetic flux density contains: pure iron-based composite soft magnetic powder particles that are subjected to an insulating treatment by a Mg-containing insulating film or a phosphate film; and Fe—Si alloy powder particles including 11%-16% by mass of Si. A ratio of an amount of the Fe—Si alloy powder particles to a total amount is in a range of 10%-60% by mass. A method for producing the composite soft magnetic material comprises the steps of: mixing a pure iron-based composite soft magnetic powder, and the Fe—Si alloy powder in such a manner that a ratio of the Fe—Si alloy powder to a total amount is in a range of 10%-60%; subjecting a resultant mixture to compression molding; and subjecting a resultant molded body to a baking treatment in a non-oxidizing atmosphere.

An iron powder and method of making an iron powder. The method includes a step of neutralizing an acidic aqueous solution containing a trivalent iron ion and a phosphorus-containing ion, with an alkali aqueous solution, so as to provide a slurry of a precipitate of a hydrated oxide, or a step of adding a phosphorus-containing ion to a slurry containing a precipitate of a hydrated oxide obtained by neutralizing an acidic aqueous solution containing a trivalent iron ion with an alkali aqueous solution. A silane compound is added to the slurry so as to coat a hydrolysate of the silane compound on the precipitate of the hydrated oxide. The precipitate of the hydrated oxide after coating is recovered through solid-liquid separation, the recovered precipitate is heated to provide iron particles coated with a silicon oxide, and a part or the whole of the silicon oxide coating is dissolved and removed.