Method for producing a layer of a device for the absorption of electromagnetic radiation

Patent metadata

Field	Value
Publication number	US-11728573-B2
Application number	US-201916697678-A
Country	US
Kind code	B2
Filing date	Nov 27, 2019
Priority date	Dec 14, 2018
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A method for producing a layer of a device for electromagnetic radiation absorption, includes: providing a ply of powder material in the layer to be produced of the device; providing a predefined concentration distribution of particles for electromagnetic radiation absorption in the layer; providing a first binder and a second binder for the powder materials, wherein the first binder includes particles for the absorption of electromagnetic radiation, wherein the second binder includes a lower concentration of identical and/or different particles than the first binder; determining a mixing ratio between the first binder and the second binder for every position in the layer; selecting a position of the layer; mixing the first and second binder according to the mixing ratio for the selected position; wetting the powder material at the selected position using the mixed first and second binders; and repeating selecting, mixing, and wetting to produce the layer.

First claim

The invention claimed is:

1. A method for producing a layer of a device for the absorption of electromagnetic radiation, wherein the method comprises:
providing a ply of powder material in the layer to be produced of the device for the absorption of electromagnetic radiation;
providing a predefined concentration distribution of particles for the absorption of electromagnetic radiation in the layer of the device for the absorption of electromagnetic radiation;
providing a first binder for the powder material and a separate second binder for the powder material, wherein the first binder comprises particles mixed in the first binder for the absorption of electromagnetic radiation, wherein the second binder comprises identical or different particles in a lower concentration mixed in the second binder for the absorption of electromagnetic radiation than the first binder or the second binder comprises no particles at all;
determining a mixing ratio between the first binder and the second binder for every position in the layer on the basis of the predefined concentration distribution;
selecting a position of the layer;
mixing the first and second binder according to the mixing ratio for the selected position;
wetting the powder material at the selected position using the mixed first and second binder; and
repeating the steps of selecting, mixing, and wetting to produce a layer of the device for the absorption of electromagnetic radiation.

2. The method according to claim 1 , wherein the particles for the absorption of electromagnetic radiation comprise dielectric, magnetic, and/or electrically conductive particles.

3. The method according to claim 1 , wherein the particles, alone or in combination with one another, are configured to absorb the electromagnetic radiation in megahertz, gigahertz, and/or terahertz range.

4. The method according to claim 1 , wherein the powder material is homogeneous.

5. The method according to claim 1 , wherein the powder material is a mixture of at least two different powder materials.

6. The method according to claim 1 , wherein the powder material comprises a ceramic material.

7. The method according to claim 1 , wherein the method further comprises:
repeating the method steps after producing a layer to produce at least one further layer of the device for the absorption of electromagnetic radiation on the produced layer.

8. The method according to claim 1 , wherein the selected positions of the layer form a structure pattern which comprises pores.

9. The method according to claim 6 , wherein the method further comprises, after the production of all layers of the device for the absorption of electromagnetic radiation:
sintering the device for the absorption of electromagnetic radiation.

10. The method according to claim 1 , wherein the selected positions of the layer form a structure pattern having different density distributions of the powder material in combination with at least the first binder.

11. The method according to claim 1 , wherein the ply of powder material in the layer to be produced of the device for the absorption of electromagnetic radiation has a structure pattern.

Assignees

• Airbus Defence & Space Gmbh

Inventors

• Karch Christian
• Metzner Christian
• Bleckmann Matthias
• Dinnebier Heinrich

Classifications

• H01Q17/00 Primary

  Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems · CPC title

• B28B1/001

  Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material (selective deposition modelling of metallic powder B22F10/00; rapid manufacturing of 3D objects in general and in particular of plastics B29C64/00) · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• H01Q17/004

  using non-directional dissipative particles, e.g. ferrite powders (H01Q17/005 takes precedence; flake-like H01Q17/002) · CPC title