Coated granular magnetite particles and process for producing the same
US5648170A · kind A · utility
11Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1994 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Apr 20, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The disclosure describes coated granular magnetite particles comprising: PA1 granular magnetite particle as a core, and PA1 M.sub.x Fe.sub.2+y O.sub.z as a surface layer, wherein M is Zn or Co, 0.4.ltoreq.x.ltoreq.1, x+y=1, and 4.0.ltoreq.z.ltoreq.4.3, PA1 the amount of M in said M.sub.x Fe.sub.2+y O.sub.z being 0.5 to 6 mol % based on the total Fe content in said granular magnetite particle as a core; and PA1 a process for producing the coated granular magnetite particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.