Metamaterial and preparation method thereof

A technology of metamaterials and casting sheets, applied in the direction of electrical components, antennas, etc., can solve the problems of quartz ceramic matrix loss and low strength of quartz ceramic matrix metamaterials, and achieve low loss, high strength, and high wave-transmitting performance Effect

Active Publication Date: 2017-01-04
SHENZHEN KUANG CHI GANG DA INNOVATIVE TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of the quartz ceramic-based metamaterial prepared in the above method is low, and it will still cause some loss to the quartz ceramic matrix.

Method used

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  • Metamaterial and preparation method thereof
  • Metamaterial and preparation method thereof
  • Metamaterial and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0043] According to another aspect of the present invention, a method for preparing a metamaterial is provided, such as Figure 7 shown. The preparation method comprises the steps of: compounding the silica sol-based slurry with quartz fibers to form a fiber composite body, and forming a metal microstructure on the surface of a casting sheet body; The blank body is pressed to form a preliminary metamaterial; the preliminary metamaterial is sintered, so that the fiber composite is sintered into a silica fiber reinforced silica matrix, and the casting sheet blank is sintered into a casting sheet, and the quartz fiber The reinforced silica matrix constitutes the substrate, and the cast sheet, metal microstructure and substrate constitute the metamaterial.

[0044] In the above preparation method, the silica sol-based slurry is compounded with quartz fibers and sintered to form a quartz fiber-reinforced silica matrix, and the quartz fiber-reinforced silica matrix constitutes the ...

Embodiment 1

[0057] The steps of the preparation method of the metamaterial provided in this embodiment include:

[0058]First, add quartz powder to the silica sol, and then adjust the pH value to 9 to form a silica sol-based slurry, and the weight percentage of quartz powder in the silica sol-based slurry is 15wt%; The material is combined with quartz fibers to form a fiber composite body, and a metal microstructure is formed on the surface of the casting sheet blank; The hot-pressing temperature is 500°C and the hot-pressing time is 0.1 hour to form the preliminary metamaterial; then, the preliminary metamaterial is sintered at 900°C for 2 hours to sinter the fiber composite The quartz fiber reinforced silica matrix is ​​sintered into the casting sheet, and the quartz fiber reinforced silica matrix constitutes the substrate, and the metal microstructure, casting sheet and substrate constitute the metamaterial, wherein the quartz fiber reinforced The silica fiber accounts for 20% by weig...

Embodiment 2

[0060] The steps of the preparation method of the metamaterial provided in this embodiment include:

[0061] First, add quartz powder to the silica sol, then adjust the pH value to 9 to form a silica sol-based slurry, add a sintering aid to the silica sol-based slurry, and the weight percentage of the quartz powder in the silica sol-based slurry is 5wt%, and the sintering aid accounted for 1wt% of the weight percentage of the silica sol-based slurry; the silica sol-based slurry was combined with the quartz fiber to form a fiber composite by the impregnation method, and the second fiber composite was prepared under the same conditions Form metal microstructure on the surface of the cast sheet green body, the cast sheet green body with metal microstructure is arranged between two fiber composites, and the hot pressing pressure is 2 atmospheres, and the hot pressing temperature is 1500 ° C, and pressing under the condition of hot pressing time of 6 hours to form a preliminary met...

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Abstract

The invention provides a metamaterial and a preparation method thereof. The metamaterial comprises substrates and a tape casting piece, which are arranged in a laminated manner in sequence. The surface of the tape casting piece is provided with a metal microstructure. The substrate is a quartz-fiber-reinforced silicon dioxide base body. The quartz-fiber-reinforced silicon dioxide base body is a sintering compound of silica-sol-based slurry and quartz fiber. The substrate is the quartz-fiber-reinforced silicon dioxide base body, and the quartz-fiber-reinforced silicon dioxide base body is the sintering compound of the silica-sol-based slurry and the quartz fiber, so that the formed metamaterial is low in sintering shrinkage rate, can be co-fired with the silver-based paste, and has higher strength and lower loss; and the metamaterial has higher wave transmissivity.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a metamaterial and a preparation method thereof. Background technique [0002] Quartz ceramics are often used to make radomes. The wave-transmitting performance of the radome prepared by the quartz ceramic-based metamaterial will be further improved, especially in the aspects of broadband wave-transmission and large-angle wave-transmission. The method for preparing quartz ceramic-based metamaterials in the prior art is high temperature co-sintering (HTCC). This method can sinter the green body of the quartz ceramic matrix at high temperature (such as >1250° C.) without causing the metal conductor (such as platinum, molybdenum, tungsten, etc.) in the metamaterial to melt. However, the disadvantage of high temperature co-sintering is that it must use extremely expensive metals (such as platinum) or use an atmosphere protection furnace. At the same time, the sintering sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00
Inventor 不公告发明人
Owner SHENZHEN KUANG CHI GANG DA INNOVATIVE TECH LTD
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