Three-dimensional molding based microwave absorbing body preparing method and corresponding microwave absorbing body

Abstract

The invention discloses a three-dimensional molding based microwave absorbing body preparing method. The three-dimensional molding based microwave absorbing body preparing method comprises the following steps that S1, a three-dimensional molding microwave absorbing material mold plate is manufactured; S2, the surface of the microwave absorbing material mold plate is sprayed with slurry to form a first coating; and S3, the inner face of the microwave absorbing material mold plate is sprayed with slurry to form a second coating. The three-dimensional molding based microwave absorbing body preparing method has the beneficial effect that the excellent electromagnetic wave absorbing or shielding effect can be achieved, and meanwhile, the three-dimensional molding based microwave absorbing bodypreparing method has the beneficial effects of being small in thickness, resistant to oxidation, small in mass, low in cost and the like.

Description

technical field [0001] The invention relates to the technical field of design and molding manufacturing of high-performance lightweight electromagnetic materials, in particular to a method for preparing a wave absorbing body based on three-dimensional molding and a corresponding wave absorbing body. Background technique [0002] Absorbing materials are widely used in electromagnetic protection and electromagnetic interference. When electromagnetic waves pass through internal absorbing particles, microwave energy is lost through resistive loss, dielectric loss or magnetic loss. Compared with the previous electromagnetic shielding materials, the absorbing material not only reduces the reflected power of the material surface, but also reduces the transmitted power of the material. In terms of structural form, absorbing materials include two types: structural type and coating type. Among them, the coating-type absorbing materials are mainly prepared by spraying, such as manual ...

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Problems solved by technology

The document "Zhou Ding, Huang Xiaozhong et al. Preparation of structural absorbing materials by 3D printing technology and their performance research. China Science and Technology Papers Online. 2014" reported a printed absorbing plate, each tiny cone on the plate contains 100,000 physical units, which materials are used in each unit, and how these materials are combined are all constructed through the design of microstructures. However, the absorbing materials proposed in this document are limited to flat materials.

[0005] In summary, reports on the preparation of microwave-absorbing materials based on three-dimensional molding mainly focus on three-dimensional molding technology, internal absorbent preparation, interlayer absorbent addition ratio, etc., and the design and manufacturing process is heavily dependent on the powder used for molding. , the addition ratio of molding powder is single, it is difficult to control, and it is difficult to ensure the accuracy. There is still a lot of room for improvement in design principles and manufacturing methods

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