Fe—Co alloy powder and method for producing the same, and antenna, inductor and EMI filter
US11103922B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2015 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Mar 7, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R13/719
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing a Fe—Co alloy powder suitable for an antenna includes steps, wherein when introducing an oxidizing agent into an aqueous solution containing Fe ions and Co ions to generate crystal nuclei and cause precipitation and growth of a precursor having Fe and Co as components, Co in an amount corresponding to 40% or more of the total amount of Co used for the precipitation reaction is added to the aqueous solution at a time after the start of the crystal nuclei generation and before the end of the precipitation reaction to obtain the precursor. Then, a dried product of the precursor is reduced to obtain a Fe—Co alloy powder. This Fe—Co alloy powder has a mean particle size of 100 nm or less, a coercive force Hc of 52.0 to 78.0 kA/m, and a saturation magnetization ss of 160 Am2/kg or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.