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公开(公告)号：US20230307844A1
公开(公告)日：2023-09-28
申请号：US17996704
申请日：2021-05-13
CPC分类号： H01Q17/00 , C08J5/18 , C08K3/041 , C08K3/22 , C08K3/34 , C08K3/38 , C09K5/14 , H05K9/0081 , C08J2375/06 , C08K2003/2227 , C08K2003/2265 , C08K2003/385 , C08K2201/001 , C08K2201/011 , C08K2201/014
摘要： A radio wave absorber with which it is possible to obtain both excellent radio wave absorption characteristics in a high-frequency band and excellent heat dissipation characteristics, and a radio wave absorber formation paste suitable for use in producing the radio wave absorber. The radio wave absorber includes a composite layer made of a radio wave absorption material and a thermally conductive material, the radio wave absorption material includes one or more types of an ε-Fe2O3 crystal; and a crystal in which the crystal and the space group are identical to those of ε-Fe2O3 and a part of an Fe site of the ε-Fe2O3 is substituted with an element M other than Fe, and that is represented by the formula ε-MxFe2-xO3 in which x is greater than 0 and less than 2.
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公开(公告)号：US20220288633A1
公开(公告)日：2022-09-15
申请号：US17635627
申请日：2020-07-30
摘要： A radio wave absorber film which is thin and exhibits excellent radio wave absorption performance; and a method for producing this radio wave absorber film. The radio wave absorber film formed on a base material layer contains a magnetic body and a binder resin in a radio wave absorption layer; and an aromatic ester-urethane copolymer is used as the binder resin. The glass transition temperature of the binder resin is 100° C. or less, and 0° C. or less. The magnetic body is at least one of an ε-iron oxide, a barium ferrite magnetic body and a strontium ferrite magnetic body
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