Conformal ceramic metamaterial and preparation method thereof

Abstract

The invention provides a conformal ceramic metamaterial and a preparation method of the conformal ceramic metamaterial. The method comprises the following steps of: degassing and pre-polymerizing suspension comprising ceramic powder and an organic system to obtain slurry, pouring the slurry into a first mold, and curing to obtain a green body; preparing the ceramic powder into ceramic slurry and casting into a green ceramic chip, and preparing a metal microstructure on the green ceramic chip through a screen printing technology; attaching the prepared green ceramic chip comprising the metal microstructure to the outer surface of the green body, and obtaining the green body with the metal microstructure; pouring the slurry into a second mold, inserting the green body with the metal microstructure, and curing to obtain a blank with a conformal structure comprising the metal microstructure; and performing degluing and sintering the blank with the conformal structure comprising the metal microstructure, thus obtaining the conformal ceramic metamaterial. The curved conformal ceramic metamaterial is prepared by organically combining a gel-casting molding method and a low temperature co-fired ceramic (LTCC) or high temperature co-fired ceramic (HTCC) technology, so that the conformal ceramic metamaterial has high wave-penetrating performance and high-temperature resistance; and because the inner and outer ceramic chip layers are combined in a conformal mode, the strength of the conformal ceramic metamaterial is improved.

Description

【Technical field】 [0001] The invention relates to the field of metamaterials, in particular to a conformal ceramic metamaterial and a preparation method thereof. 【Background technique】 [0002] Metamaterials are materials that can modulate electromagnetic waves developed in the past ten years. Metamaterials are generally composed of a certain number of metal microstructures attached to a substrate with certain mechanics and electromagnetism. These microstructures with specific patterns and materials can modulate electromagnetic waves of specific frequency bands passing through them. [0003] The current metamaterials are covered with metal microstructures on a flat substrate, but the metamaterials actually required are curved surfaces rather than flat surfaces. Metamaterials made of low-dielectric constant and low-loss ceramics have good wave-transmitting performance and high-temperature resistance, but they cannot meet high-strength performance. 【Content of invention】 ...

AI Technical Summary

Problems solved by technology

Metamaterials made of low-dielectric constant and low-loss ceramics have good wave-transmitting performance and high-temperature resistance, but they cannot meet high-strength performance.

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