Particles for absorbing GHz-band electromagnetic wave and electromagnetic wave absorber including same
AssigneesHyundai Motor Company, Kia Motors Corporation, Korea National University of Transportation Industry-Academic Cooperation Foundation
InventorsHyung Suk Kim, Eun Soo Lim, Ji Eun Yoo, Young Min Kang
Life of this patent
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Abstract
An electromagnetic wave absorbing particle has a composition, which is represented by Formula 1 of Sr1-xRxFey-2zM2zOa and contains M-type hexaferrite as a main phase. In Formula 1, R is one or more substances selected from among Ba, Ca, and La, M is one or more substances selected from among Co, Ti, and Zr, 0<x≤0.8, 8≤y≤14, 0<z≤1.5, and a is equal to 19.
Claims8
An electromagnetic wave absorbing particle for a GHz frequency band, the electromagnetic wave absorbing particle having a composition represented by Formula 1 and having an M-type hexaferrite as a major phase,
- Sr1-xRxFey-2zM2zOa [Formula 1]
- where R is one or more substances selected from among Ba, Ca, and La,
- M is one or more substances selected from among Co, Ti and Zr,
- 0<x≤0.8,
- 8≤y≤14,
- 0<z≤1.5, and
- a=19,
- wherein the electromagnetic wave absorbing particle has a composition represented by Formula 2,
- Sr1-xRxFey-2zCozTizO19 [Formula 2]
- where R is one or more substances selected from among Ba, Ca, and La,
- 0<x≤0.8,
- 8≤y≤14, and
- 0<z≤1.5.
An electromagnetic wave absorber for a GHz frequency band, the electromagnetic wave absorber comprising:
- a polymer resin;
- and
- an electromagnetic wave absorbing particle having a composition represented by Formula and having an M-type hexaferrite as a major phase,
- Sr1-xRxFey-2zM2zOa [Formula 1]
- where R is one or more substances selected from among Ba, Ca, and La,
- M is one or more substances selected from among Co, Ti and Zr,
- 0<x≤0.8,
- 8≤y≤14,
- 0<z≤1.5, and
- a=19,
- wherein the electromagnetic wave absorbing particle has a composition represented by Formula 2,
- Sr1-xRxFey-2zCozTizO19 [Formula 2]
- where R is one or more substances selected from among Ba, Ca, and La,
- 0<x≤0.8,
- 8≤y≤14, and
- 0<z≤1.5.
Dependencies are inferred from the claim text.