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US 12,426,224 B2Granted
Radio wave absorbing composition and radio wave absorber
AssigneeFUJIFILM Corporation
InventorsYoshihiro Nakai, Hirokazu Hashimoto
Life of this patent
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Abstract
There is provided a radio wave absorbing composition containing a magnetic powder and a binder. There is also provided a radio wave absorber containing a magnetic powder and a binder. The magnetic powder is a powder of a substitution-type hexagonal ferrite subjected to surface treatment with a surface treatment agent, and the binder is a polyamide.
Claims19
A radio wave absorbing composition comprising:
- a magnetic powder;
- and
- a binder,
- wherein the magnetic powder is a powder of a substitution-type hexagonal ferrite subjected to surface treatment with a surface treatment agent,
- the binder is a polyamide, and
- the substitution-type hexagonal ferrite has a constitution represented by General Formula 1,
- General Formula 1:
- AFe(12-x)AlxO19
- in General Formula 1, A represents one or more kinds of atoms selected from the group consisting of Sr, Ba, Ca, and Pb, and x satisfies 1.50≤x≤8.00.
6 more elements
A radio wave absorber comprising:
- a magnetic powder;
- and
- a binder,
- wherein the magnetic powder is a powder of a substitution-type hexagonal ferrite subjected to surface treatment with a surface treatment agent,
- the binder is a polyamide, and
- the polyamide is one or more polyamides selected from the group consisting of a polyamide 9T, a polyamide 11, a polyamide elastomer, and an amorphous polyamide.
3 more elements
A radio wave absorber comprising:
- a magnetic powder;
- and
- a binder,
- wherein the magnetic powder is a powder of a substitution-type hexagonal ferrite subjected to surface treatment with a surface treatment agent,
- the binder is a polyamide, and
- the substitution-type hexagonal ferrite has a constitution represented by General Formula
- AFe(12-x)AlxO19 General Formula 1:
- in General Formula 1, A represents one or more kinds of atoms selected from the group consisting of Sr, Ba, Ca, and Pb, and x satisfies 1.50≤x≤8.00.
5 more elements
Dependencies are inferred from the claim text.