Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A metamaterial-based silicon carbide composite wave-absorbing ceramic and its preparation method

A technology of composite materials and composite material layers, which is applied in the field of silicon carbide composite material microwave-absorbing ceramics based on metamaterials and its preparation, can solve the problems of limited selection range of periodic structures, unsatisfactory high-temperature microwave absorption performance, and high brittleness of dielectric substrates. , to achieve the effects of convenient engineering application, controllable and load-carrying performance of the absorbing performance, and good absorbing performance

Active Publication Date: 2019-03-05
NAT UNIV OF DEFENSE TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still the following deficiencies: 1) The range of periodic structure selection is limited; 2) The dielectric base layer is brittle, easy to break, and poor in use reliability; 3) The high-temperature wave-absorbing performance is not ideal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A metamaterial-based silicon carbide composite wave-absorbing ceramic and its preparation method
  • A metamaterial-based silicon carbide composite wave-absorbing ceramic and its preparation method
  • A metamaterial-based silicon carbide composite wave-absorbing ceramic and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A kind of metamaterial-based silicon carbide composite wave-absorbing ceramics of the present invention, such as figure 1 As shown, it is composed of a silicon carbide composite material layer 1, an anti-oxidation adhesive layer 2 and a metamaterial layer 3 from the inside to the outside. The silicon carbide composite material layer 1 is composed of fibers with a resistivity of 10 5 ~10 6 The continuous silicon carbide fiber plain weave cloth of Ω·cm is Z-stitched into a three-dimensional braided reinforced silicon carbide composite material, the anti-oxidation adhesive layer 2 is composed of cordierite coating, and the metamaterial layer 3 is composed of capacitive periodic pattern The resistive coating is arranged periodically, and the resistive coating includes a conductive phase and an organic carrier, and the conductive phase includes glass powder and ruthenium dioxide powder. Its preparation method comprises the following steps:

[0053] (1) Select a resistivit...

Embodiment 2

[0065] A silicon carbide composite wave-absorbing ceramic based on a metamaterial of the present invention is composed of a silicon carbide composite material layer, an anti-oxidation adhesive layer and a metamaterial layer from inside to outside in sequence, and the silicon carbide composite material layer is composed of fiber resistance Rate 10 5 ~10 6 The continuous SiC fiber plain weave cloth of Ω·cm is Z-stitched into a three-dimensional braid to reinforce the SiC composite material. The coating is arranged periodically, and the resistance coating includes a conductive phase and an organic carrier, and the conductive phase includes glass powder and ruthenium dioxide powder. Its preparation method comprises the following steps:

[0066] (1) Select a resistivity of 10 5 ~10 6 The continuous silicon carbide fiber of Ω·cm is woven into a plain weave with a thickness of about 0.4 mm according to the weaving density of 5 fibers / cm in the warp and weft directions, and the p...

Embodiment 3

[0078] A silicon carbide composite wave-absorbing ceramic based on a metamaterial of the present invention is composed of a silicon carbide composite material layer, an anti-oxidation adhesive layer and a metamaterial layer from inside to outside in sequence, and the silicon carbide composite material layer is composed of fiber resistance Rate 10 5 ~10 6 The continuous SiC fiber plain weave cloth of Ω·cm is Z-stitched into a three-dimensional braid to reinforce the SiC composite material. The coating is arranged periodically, and the resistance coating includes a conductive phase and an organic carrier, and the conductive phase includes glass powder and ruthenium dioxide powder. Its preparation method comprises the following steps:

[0079] (1) Select a resistivity of 10 5 ~10 6 The continuous silicon carbide fiber of Ω·cm is woven into a plain weave with a thickness of about 0.45mm according to the weaving density of 5 fibers / cm in the warp and weft directions, and the p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electrical resistivityaaaaaaaaaa
surface roughnessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses silicon carbide composite wave absorbing ceramic based on a metamaterial. The silicon carbide composite wave absorbing ceramic is composed of a silicon carbide composite layer, an antioxidant bonding layer and a metamaterial layer from inside to outside in sequence. The silicon carbide composite layer is composed of a three-dimensional knitted part reinforced silicon carbide composite sewn through continuous silicon carbide fiber plain cloth in the Z direction, and the fiber electrical resistivity of the composite ranges from 10<5> omega.cm to 10<6> omega.cm; the antioxidant bonding layer is composed of a cordierite coating, and the metamaterial layer is formed by periodically arranging resistance coatings of capacitive or inductive periodic patterns. The advantages of achieving wide frequency and low frequency wave absorption, being resistant to high temperature, high in wave absorbing performance regulation and control performance, achieving bearing and the like are integrated, the technical problem of poor low frequency wave absorbing performance troubling a high-temperature wave absorbing material all the time is solved, the structure is simple, implementation is easy, and high designability is achieved. The invention further discloses a preparation method of the silicon carbide composite wave absorbing ceramic based on the metamaterial. The raw materials are easy to obtain, and engineering application is convenient.

Description

technical field [0001] The invention belongs to the field of high-temperature-resistant wave-absorbing materials, and in particular relates to a supermaterial-based silicon carbide composite wave-absorbing ceramic and a preparation method thereof. Background technique [0002] According to the service temperature range, radar absorbing materials can be divided into two categories: normal temperature (operating temperature below 200°C) and high temperature. In contrast, the current research on normal-temperature radar absorbing materials is relatively mature, while the research on high-temperature radar absorbing materials is still in active exploration. [0003] Continuous silicon carbide fiber-reinforced silicon carbide composite materials have the advantages of high temperature resistance, low density, high strength, high toughness, etc. At the same time, silicon carbide materials have semiconductor characteristics, and can be made to have different compositions and proper...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/565C04B35/622C04B41/89
CPCC04B35/565C04B35/622C04B35/80C04B41/52C04B41/89C04B41/5022C04B41/46C04B41/4803
Inventor 刘海韬程海峰田浩黄文质周永江姜如
Owner NAT UNIV OF DEFENSE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com