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US 11,539,141 B2Granted
Radio wave absorber
AssigneesPanasonic Holdings Corporation, The University of Tokyo
InventorsShin-ichi Ohkoshi, Asuka Namai, Seiji Nishitani, Tomohiro Kuzuu
Life of this patent
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Abstract
A radio wave absorber includes a base member, and a radio wave absorption film formed on the base member. The radio wave absorption film includes at least MTC-substituted ε-Fe2O3 and black titanium oxide. The MTC-substituted ε-Fe2O3 is a crystal belonging to the same space group as an ε-Fe2O3 crystal and expressed by ε-MxTiyCoyFe2−2y−xO3 where M is at least one element selected from the group consisting of Ga, In, Al, and Rh, 0<x<1, and 0<y<1.
Claims15
A radio wave absorber comprising:
- a base member;
- and
- a radio wave absorption film formed on the base member,
- the radio wave absorption film including at least MTC-substituted ε-Fe2O3 and black titanium oxide,
- the MTC-substituted ε-Fe2O3 being a crystal belonging to the same space group as an ε-Fe2O3 crystal and expressed by ε-MxTiyCoyFe2−2y−xO3 where M is at least one element selected from the group consisting of Ga, In, Al, and Rh, 0<x<1, and 0<y<1;
- and
- a blending ratio of the black titanium oxide being 5% to 40% by volume of an overall volume of the ratio wave absorption film.
4 more elements
A radio wave absorber comprising:
- a base member;
- and
- a radio wave absorption film formed on the base member,
- the radio wave absorption film including at least MTC-substituted ε-Fe2O3 and black titanium oxide,
- the MTC-substituted ε-Fe2O3 being a crystal belonging to the same space group as an ε-Fe2O3 crystal and expressed by ε-MxTiyCoyFe2−2y−xO3 where M is at least one element selected from the group consisting of Ga, In, Al, and Rh, 0<x<1, and 0<y<1, and
- the black titanium oxide includes at least one compound selected from the group consisting of Ti4O7 and λ-Ti3O5.
3 more elements
Dependencies are inferred from the claim text.