Title:
COATED FERRAMAGNETIC PARTICLES AND COMPOSITION, ASSOCIATED FABRICATION METHOD, AND ITS USE AS RADAR ABSORBING MATERIAL
Document Type and Number:
WIPO Patent Application WO2001095347
Kind Code:
A3
Abstract:
Coated ferromagnetic particles are provided which are useful as radar absorbing material (RAM). In particular, ferromagnetic particles such as iron, carbonyl iron, cobalt, nickel, and alloys thereof are provided that have been coated with a protective non-conducting material such as silicon, silicon dioxide, aluminum oxide, and the like. The ferromagnetic particles are coated in a rotating retort containing a gaseous composition that deposits onto or diffuses into the particle. The coated particles of the present invention are particularly suitable for incorporation into RAM coating compositions intended for use in corrosive atmospheres.
Inventors:
PETERMAN DOUGLAS J
Application Number:
PCT/US2001/016701
Publication Date:
March 28, 2002
Filing Date:
May 22, 2001
Export Citation:
Assignee:
BOEING CO (US)
International Classes:
H01F1/24; H01F1/28; H01Q17/00; (IPC1-7): H01F1/24; H01F1/28; H01Q17/00; H05K9/00
Foreign References:
| US4882224A | 1989-11-21 | |||
| US4006479A | 1977-02-01 |
Download PDF:
Previous Patent: CONDUCTIVE COMPOSITION, METHOD FOR MANUFACTURING ELECTRODE OR PRINTED BOARD COMPRISING THE SAME, MET...
Next Patent: LIGHTING ASSEMBLY
Next Patent: LIGHTING ASSEMBLY