Electromagnetic wave absorber and film forming paste
US-2016164187-A1 · Jun 9, 2016 · US
Radio wave absorber
US11539141B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11539141-B2 |
| Application number | US-201816626181-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 25, 2018 |
| Priority date | Jun 30, 2017 |
| Publication date | Dec 27, 2022 |
| Grant date | Dec 27, 2022 |
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- Title
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Abstract
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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.
First claim
Opening claim text (preview).
The invention claimed is: 1. 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-Fe 2 O 3 and black titanium oxide, the MTC-substituted ε-Fe 2 O 3 being a crystal belonging to the same space group as an ε-Fe 2 O 3 crystal and expressed by ε-M x Ti y Co y Fe 2−2y−x O 3 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. 2. The radio wave absorber of claim 1 , wherein the black titanium oxide includes at least one compound selected from the group consisting of Ti 4 O 7 and λ-Ti 3 O 5 . 3. The radio wave absorber of claim 1 , wherein the radio wave absorption film further includes a cured product of a thermosetting resin. 4. The radio wave absorber of claim 3 , wherein the thermosetting resin includes at least one resin selected from the group consisting of epoxy resins, silicone resins, phenolic resins, and polyimide resins. 5. The radio wave absorber of claim 1 , wherein the radio wave absorption film further includes a ceramic. 6. The radio wave absorber of claim 5 , wherein the ceramic is made of a metal oxide. 7. The radio wave absorber of claim 2 , wherein the radio wave absorption film further includes a cured product of a thermosetting resin. 8. The radio wave absorber of claim 7 , wherein the thermosetting resin includes at least one resin selected from the group consisting of epoxy resins, silicone resins, phenolic resins, and polyimide resins. 9. The radio wave absorber of claim 2 , wherein the radio wave absorption film further includes a ceramic. 10. The radio wave absorber of claim 9 , wherein the ceramic is made of a metal oxide. 11. 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-Fe 2 O 3 and black titanium oxide, the MTC-substituted ε-Fe 2 O 3 being a crystal belonging to the same space group as an ε-Fe 2 O 3 crystal and expressed by ε-M x Ti y Co y Fe 2−2y−x O 3 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 Ti 4 O 7 and λ-Ti 3 O 5 . 12. The radio wave absorber of claim 11 , wherein the radio wave absorption film further includes a cured product of a thermosetting resin. 13. The radio wave absorber of claim 12 , wherein the thermosetting resin includes at least one resin selected from the group consisting of epoxy resins, silicone resins, phenolic resins, and polyimide resins. 14. The radio wave absorber of claim 11 , wherein the radio wave absorption film further includes a ceramic. 15. The radio wave absorber of claim 14 , wherein the ceramic is made of a metal oxide.
Assignees
Inventors
Classifications
- C01G49/0018Primary
Mixed oxides or hydroxides, (C01G49/0009 takes precedence) · CPC title
characterised by the use of special additives · CPC title
containing elements as dopants · CPC title
Layered products comprising a {layer of a} particular substance not covered by groups B32B11/00 - B32B29/00 · CPC title
as substitutes for glycerol in its non-chemical uses, e.g. as a base in toiletry creams or ointments · CPC title
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- What does patent US11539141B2 cover?
- 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 c…
- Who is the assignee on this patent?
- Univ Tokyo, Panasonic Corp, Panasonic Holdings Corp
- What technology area does this patent fall under?
- Primary CPC classification C01G49/0018. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 27 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).