Electromagnetic shielding material
US4690778A · kind A · utility
29Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1985 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | May 20, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An electromagnetic shielding material comprising a composition consisting of Mn-Zn ferrite powders, conductive carbon powders and organic high molecular weight compounds. The Mn-Zn ferrite powders may be contained in the range between 30 and 70 vol %. The composition has 10.sup.2 to 10.sup.-1 ohm.cm of volume resistivity and exhibits excellent electromagnetic absorbing property. The electromagnetic shielding material can prevent transmission of electromagnetic waves and attenuate refleted waves by absorbing the waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.