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ELECTROMAGNETIC WAVE ABSORPTION MATERIAL, ELECTROMAGNETIC WAVE ABSORBER, AND ELECTRONIC ELEMENT, ELECTRONIC COMPONENT OR ELECTRONIC APPARATUS INCLUDING THE ELECTROMAGNETIC WAVE ABSORBER
To provide an electromagnetic wave absorption material and an electromagnetic wave absorber, in which dielectric loss is used and which can be put to practical use in a high frequency band.SOLUTION: There is provided an electromagnetic wave absorption material including an electrically insulating matrix and ferromagnetic metal powder dispersed in the electrically insulating matrix. The content ratio of the ferromagnetic metal powder is 50 vol.% or more, and the average aspect ratio of the ferromagnetic metal powder is 5.0 or less. The electromagnetic wave absorption material has the peak of a dielectric tangent (tanδE) in a frequency band of 0.1 GHz or more and 18 GHz or less, and the value of a dielectric tangent (tanE) at the peak is 0.05 or more.SELECTED DRAWING: Figure 7
【課題】誘電損失を利用した、高周波帯域で実用に供し得る電磁波吸収材料及び電磁波吸収体を提供すること。【解決手段】電気絶縁性マトリックスと、前記電気絶縁性マトリックス中に分散する強磁性金属粉と、を含む、電磁波吸収材料であって、前記強磁性金属粉の含有割合が５０体積％以上であり、前記強磁性金属粉の平均アスペクト比が５．０以下であり、前記電磁波吸収材料は０．１ＧＨｚ以上１８ＧＨｚ以下の周波数帯域において、誘電正接（ｔａｎδＥ）のピークをもち、前記ピークにおける誘電正接（ｔａｎδＥ）の値が０．０５以上である、材料。【選択図】図７
ELECTROMAGNETIC WAVE ABSORPTION MATERIAL, ELECTROMAGNETIC WAVE ABSORBER, AND ELECTRONIC ELEMENT, ELECTRONIC COMPONENT OR ELECTRONIC APPARATUS INCLUDING THE ELECTROMAGNETIC WAVE ABSORBER
To provide an electromagnetic wave absorption material and an electromagnetic wave absorber, in which dielectric loss is used and which can be put to practical use in a high frequency band.SOLUTION: There is provided an electromagnetic wave absorption material including an electrically insulating matrix and ferromagnetic metal powder dispersed in the electrically insulating matrix. The content ratio of the ferromagnetic metal powder is 50 vol.% or more, and the average aspect ratio of the ferromagnetic metal powder is 5.0 or less. The electromagnetic wave absorption material has the peak of a dielectric tangent (tanδE) in a frequency band of 0.1 GHz or more and 18 GHz or less, and the value of a dielectric tangent (tanE) at the peak is 0.05 or more.SELECTED DRAWING: Figure 7
【課題】誘電損失を利用した、高周波帯域で実用に供し得る電磁波吸収材料及び電磁波吸収体を提供すること。【解決手段】電気絶縁性マトリックスと、前記電気絶縁性マトリックス中に分散する強磁性金属粉と、を含む、電磁波吸収材料であって、前記強磁性金属粉の含有割合が５０体積％以上であり、前記強磁性金属粉の平均アスペクト比が５．０以下であり、前記電磁波吸収材料は０．１ＧＨｚ以上１８ＧＨｚ以下の周波数帯域において、誘電正接（ｔａｎδＥ）のピークをもち、前記ピークにおける誘電正接（ｔａｎδＥ）の値が０．０５以上である、材料。【選択図】図７
ELECTROMAGNETIC WAVE ABSORPTION MATERIAL, ELECTROMAGNETIC WAVE ABSORBER, AND ELECTRONIC ELEMENT, ELECTRONIC COMPONENT OR ELECTRONIC APPARATUS INCLUDING THE ELECTROMAGNETIC WAVE ABSORBER
電磁波吸収材料、電磁波吸収体、並びに前記電磁波吸収体を備えた電子素子、電子部品又は電子機器
KASHIWATANI SATOSHI (author) / UEDA TAKAHIRO (author) / HANZAWA KAZUKI (author) / OZAWA MAKOTO (author)
2023-01-18
Patent
Electronic Resource
Japanese
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