Radio wave absorbent

Details Radio wave absorbent Radio wave absorbent

1998-02-02

1999-10-12

Anthony, Joseph D.

Compositions

Magnetic

Iron-oxygen compound containing

252 6256, 252 6255, 252 623R, 252 623BT, 342 1, 342 2, 342 4, 219736, 219744, 2505151, 2505181, 423594, 174 35R, C04B 3526, H01P 126, H01Q 1700

Patent

active

059650567

ABSTRACT:
A radio wave absorbent comprises an Ni--Cu--Zn base ferrite having a major composition comprising 49 to less than 50 mol % of Fe.sub.2 O.sub.3, 32 to 35 mol % of ZnO, 3 to 9 mol % of CuO and 9 to 14 mol % of NiO. The radio wave absorbent further contains an additive molybdenum oxide in an amount of greater than 0 to 0.10 wt %, calculated as MoO.sub.3, with the proviso that the total amount of the major composition is 100 wt %. The radio wave absorbent may be used as an exterior or interior material for a building or structure.

REFERENCES:
patent: 3720951 (1973-03-01), Naito
patent: 4731286 (1988-03-01), Yamashita et al.
patent: 4990202 (1991-02-01), Murata et al.
patent: 5310598 (1994-05-01), Yoshinaka et al.
patent: 5476728 (1995-12-01), Nakano et al.
patent: 5711893 (1998-01-01), Park
patent: 5775810 (1998-07-01), Shin
patent: 5906768 (1999-05-01), Kakinuma et al.

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