Nickel oxide micropowder and method for producing same

Patent metadata

Field	Value
Publication number	US-10329163-B2
Application number	US-201715704781-A
Country	US
Kind code	B2
Filing date	Sep 14, 2017
Priority date	Aug 6, 2011
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

Nickel hydroxide obtained by neutralizing an aqueous nickel sulfate solution with an alkali is heat-treated in a non-reducing atmosphere at a temperature higher than 850° C. but lower than 1050° C. to form nickel oxide particles, and a sintered compact of nickel oxide particles that may be formed during the heat treatment is pulverized by preferably allowing the nickel oxide particles to collide with one another. The thus obtained nickel oxide fine powder has a sulfur content of 400 mass ppm or less, a chlorine content of 50 mass ppm or less, a sodium content of 100 mass ppm or less, and a specific surface area of 3 m2/g or more but less than 6 m2/g.

First claim

The invention claimed is:

1. A nickel oxide fine powder having a specific surface area of 3 m 2 /g or more but less than 4.3 m 2 /g, a sulfur content of 140 mass ppm or less, a chlorine content of 50 mass ppm or less, and a sodium content of 100 mass ppm or less.

2. The nickel oxide fine powder according to claim 1 , which has a D90 of 0.42 μm or more and 2 μm or less as measured by a laser scattering method.

Assignees

• Sumitomo Metal Mining Co

Inventors

• Yonesato Norimichi
• Ito Tai

Classifications

• C01P2006/12

  Surface area · CPC title

• Y10T428/2982

  Particulate matter [e.g., sphere, flake, etc.] · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C01G53/04 Primary

  Oxides · CPC title

• C01P2004/51

  Particles with a specific particle size distribution · CPC title