Electromagnetic wave absorber formed of Mn-Zn ferrite
US7101488B2 · kind B2 · utility
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Key dates
| Filing date | Jan 30, 2004 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Mar 10, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12729
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An electromagnetic wave absorber is formed of an Mn—Zn ferrite including: a spinel primary phase which contains 40.0 to 49.9 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.1 to 4.0 mol % TiO2 and/or SnO2, and the remainder consisting of MnO; and a secondary phase which contains CaO as a base component. In the ferrite, the mass of the spinel primary phase accounts for 50.0 to 99.0% of the aggregate mass of the spinel primary phase and the secondary phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.