Powder of β-iron oxyhydroxide-based compound, β-iron oxyhydroxide-based compound sol, manufacturing method of powder of ϵ-iron oxide-based compound, and manufacturing method of magnetic recording medium
AssigneeFUJIFILM Corporation
InventorTakashi Fujimoto
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Abstract
Provided is a powder of a β-iron oxyhydroxide-based compound that is a group of particles of a β-iron oxyhydroxide-based compound represented by Formula (1) below; in which a surface of the particles of the β-iron oxyhydroxide-based compound is modified with a surface modifier; in which, in a case where the powder is dispersed in water to be made into a sol, a zeta potential of the powder is equal to or higher than +5 mV at pH 10; and β-AaFe1-aOOH (1) in which, in Formula (1), A represents at least one metallic element other than Fe, and a represents a number that satisfies a relationship of 0≤a<1.
Claims4
A powder of a β-iron oxyhydroxide-based compound that is a group of particles of a β-iron oxyhydroxide-based compound represented by Formula (1) below;
- wherein a surface of the particles of the β-iron oxyhydroxide-based compound is modified with a surface modifier;
- wherein, in a case where the powder is dispersed in water to be made into a sol, a zeta potential of the powder is equal to or higher than +5 mV at pH 10;
- β-AaFe1-aOOH (1)
- wherein, in Formula (1), A represents at least one metallic element other than Fe, and a represents a number that satisfies a relationship of 0≤a<1, and
- wherein the surface modifier is at least one compound selected from the group consisting of dopamine hydrochloride, adrenaline hydrochloride, isoproterenol hydrochloride, and arginine.
A β-iron oxyhydroxide-based compound sol:
- wherein a powder that is a group of particles of a β-iron oxyhydroxide-based compound represented by Formula (1) below is dispersed in water;
- wherein a surface of the particles of the β-iron oxyhydroxide-based compound is modified with a surface modifier;
- wherein a zeta potential of the powder of the β-iron oxyhydroxide-based compound is equal to or higher than +5 mV at pH 10;
- β-AaFe1-aOOH (1)
- wherein, in Formula (1), A represents at least one metallic element other than Fe, and a represents a number that satisfies a relationship of 0≤a<1, and
- wherein the surface modifier is at least one compound selected from the group consisting of dopamine hydrochloride, adrenaline hydrochloride, isoproterenol hydrochloride, and arginine.
Dependencies are inferred from the claim text.