Electromagnetic wave absorbing material
US5094907A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1990 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Jul 10, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention provides an electromagnetic wave absorbing material composed of a composite material comprising a fiber having a specific resistance of 10.sup.-2 to 10.sup.2 .OMEGA..cm and a matrix, wherein the fiber is composed of an inorganic substance selected from the group consisting of PA1 i) an amorphous substance substantially composed of Si, M, C and O, PA1 ii) crystalline ultrafine particles substantially composed of .beta.-SiC, C, MC, a solid solution of .sym.-SiC and MC and/or MC.sub.1-x, and having a particle diameter of not more than 500 .ANG., or optionally, an aggregate of the crystalline ultrafine particles, amorphous SiO.sub.2 and amorphous MO.sub.2, and PA1 iii) a mixture of the above i) amorphous substance with the above ii) crystalline ultrafine particles or aggregate in which M denotes Ti or Zr, and X is more than 0 but less than 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.