Radio wave absorbent
AssigneeTDK Corporation
InventorsHiroshi Okuyama, Yutaka Saito
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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.
Claims3
A radio wave absorbent comprising an Ni--Cu--Zn base ferrite having a major composition comprising an iron oxide, a zinc oxide, a copper oxide and a nickel oxide in the following amounts, calculated as Fe.sub.2 O.sub.3, ZnO, CuO and NiO, respectively:
- Fe.sub.2 O.sub.3 :
- 49 to 50 mol % with the exception of 50 mol %
- ZnO:
- 32 to 35 mol %
- CuO:
- 3 to 9 mol %
- NiO:
- 9 to 14 mol %
- and further containing an additive molybdenum oxide in an amount, calculated as MoO.sub.3, of 0 to 0.10 wt % with the exception of 0 wt % and on condition that the total amount of the major composition is 100 wt %.
Dependencies are inferred from the claim text.