3D printing anisotropic microwave absorber and preparation method thereof
An anisotropic, microwave absorption technology, used in magnetic objects, magnetic materials, metal processing equipment, etc., can solve the problem of narrow resonance frequency range of microwave absorbers
Inactive Publication Date: 2017-10-17
CENT IRON & STEEL RES INST
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Problems solved by technology
[0006] The purpose of the present invention is to provide 3D printing anisotropic microwave absorber and its preparation method, which solves the problems of narrow resonant frequency range of the microwave absorber and the microwave absorber prepared by the preparation method; it can realize the preparation of broadband microwave absorber
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[0021] Below in conjunction with accompanying drawing and embodiment, specific embodiment of the present invention is described in further detail:
[0022] Sm with easy surface anisotropy 2 Fe 14 Ingot B was melt-quickened, and the quenched thin strips were ground into particles of about 50-60 microns with an agate mortar under the protection of n-hexane. Then add 100ml of isopropanol and 0.2ml of phthalate coupling agent to wet mill the particles with a planetary ball mill. The time is 1 hour, the total time of ball milling is set to 16 hours, the average particle size is 3-4 microns, and finally the samples are dried.
[0023] The dried magnetic powder and adhesive are mixed evenly, and then added to the mold by the feeding system after mixing, and pressed by the upper and lower pressure heads under the magnetic field to form a microwave absorbing sheet with magnetic powder orientation, and the thickness of the absorbing sheet is 0.5mm. Cut the absorbing sheet according t...
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Abstract
The invention discloses a 3D printing anisotropic microwave absorber and a preparation method thereof, and belongs to the technical field of microwave absorption. The microwave absorber is prepared from magnetic powder with easy-plane anisotropy, including one or more of rare earth intermetallic compound material with easy-plane magnetocrystalline anisotropy, ferrite material and 3d metal alloy material with easy-plane shape anisotropy. The microwave absorber is an anisotropic microwave absorbing sheet with semicontinuous or continuous orientation change. The microwave absorber is prepared through the process of making powder, conducting orientation molding to form a sheet, cutting the sheet into unit sheets in a needed shape, and stacking and curing the unit sheets layer by layer. The 3D printing anisotropic microwave absorber and the preparation method thereof have the advantages that preparation of the 3D printing anisotropic microwave absorber is achieved; by adjusting the direction of an oriented magnetic field, control over the direction of orientation of the absorbing sheet is achieved, the defect that the direction of orientation of a traditional absorber can not continuously change is overcome, and continuous or semicontinuous change of the direction of orientation of the same absorber is achieved.
Description
technical field [0001] The invention belongs to the technical field of microwave absorbing materials, in particular to a 3D printed anisotropic microwave absorber and a preparation method thereof. Background technique [0002] In recent years, rapid prototyping technologies such as "additive manufacturing" and "3D printing" have developed rapidly, and combined with traditional manufacturing technologies, from the initial rapid prototyping only suitable for wood, resin, plastic and other raw materials, to metal, high temperature A new technology approach for low-cost, short-cycle, near-net-shape manufacturing of large and complex structural parts such as alloys. This technology is a transformative digital molding technology that can greatly improve production efficiency, reduce costs, and achieve product diversity. 3D printing technology presents the physical world in a digital way, and becomes a bridge connecting the virtual world and the physical world, enabling artificial...
Claims
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IPC IPC(8): H01F1/147H01F1/22H01F41/02B22F1/00B22F3/02B22F3/10B22F7/02B33Y10/00
CPCH01F1/147H01F1/22H01F41/0273B22F3/02B22F3/10B22F7/02B33Y10/00B22F1/10
Inventor 韩瑞李卫董生智周栋陈红升
Owner CENT IRON & STEEL RES INST