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Surface ceramic bovine stephanoporate bamboo charcoal wave-suction material of load magnetic metal and method of producing the same

A technology of magnetic metal and wave absorbing material, applied in the direction of magnetic field/electric field shielding, electrical components, etc., can solve problems such as difficulty, and achieve the effect of increasing performance, enhancing electrical conductivity, and improving the degree of graphitization

Inactive Publication Date: 2008-09-24
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of tactical technical indicators and environmental conditions, it is quite difficult to carry out ideal design; the second is to apply wave-absorbing materials

Method used

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  • Surface ceramic bovine stephanoporate bamboo charcoal wave-suction material of load magnetic metal and method of producing the same
  • Surface ceramic bovine stephanoporate bamboo charcoal wave-suction material of load magnetic metal and method of producing the same
  • Surface ceramic bovine stephanoporate bamboo charcoal wave-suction material of load magnetic metal and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Cut bamboo slices of 20mm×8mm×3mm from the thorny bamboo, and dry the bamboo slices to remove moisture. The bamboo slices were soaked in a sodium hydroxide solution with a concentration of 3 mol / L for 10 hours, then suction filtered and rinsed with deionized water until the pH value of the filtrate was 7. Bamboo slices were dried at 120°C. Bamboo slices were placed in a carbonization furnace and carbonized at 800°C under the protection of nitrogen for 3 hours to prepare bamboo charcoal.

[0021] Bamboo charcoal was soaked in 3mol / L nickel sulfate solution for 12 hours, and then suction filtered. Bamboo charcoal was dried at 120°C.

[0022] Put the bamboo charcoal in the prepared silica sol and infiltrate it in vacuum for 10 hours, then take it out and heat it in the oven at 60°C for 4 hours to make the silica sol gelation reaction, and then continue to heat it at 120°C Tumble dry.

[0023] Finally, the bamboo charcoal was placed in a carbonization furnace and carbon...

Embodiment 2

[0027] Take by weighing 5g of bamboo charcoal powder with a particle size of 500 mesh, dry and remove moisture. The bamboo charcoal powder was soaked in a sulfuric acid solution with a concentration of 1mol / L for 18 hours, then suction filtered and rinsed with deionized water until the pH value of the filtrate was 7.

[0028] Dry the bamboo charcoal powder in an oven at 120°C. Then soak the bamboo charcoal powder in 2mol / L ferric chloride solution for 18 hours, then suction filter. Dry the bamboo charcoal powder at 120°C.

[0029] Put the bamboo charcoal powder in the prepared silica sol and infiltrate it in a vacuum for 8 hours, then take it out and keep it in the oven at 60°C for 3 hours, so that the silica sol will undergo gelation reaction, and continue to dry at 120°C Tumble dry.

[0030] Finally, the bamboo charcoal powder is placed in a carbonization furnace and carbonized at 1450°C under the protection of nitrogen. The holding time is 2 hours, and the surface cerami...

Embodiment 3

[0033] Cut bamboo slices of 15mm x 6mm x 3mm from moso bamboo, and dry the bamboo slices to remove moisture. The bamboo slices were soaked in a nitric acid solution with a concentration of 2mol / L for 20 hours, then suction filtered and rinsed with deionized water until the pH value of the filtrate was 7. Bamboo slices were dried at 120°C. Bamboo slices were placed in a carbonization furnace for carbonization treatment at 1000°C under nitrogen protection, and the holding time was 1 hour to prepare bamboo charcoal.

[0034] Bamboo charcoal was soaked in 2.5mol / L ferric chloride solution for 12 hours, and then suction filtered. Bamboo charcoal was soaked in 2.5mol / L nickel sulfate solution for 12 hours, and then suction filtered. Bamboo slices were dried at 120°C.

[0035] Put the bamboo charcoal in the prepared silica sol and infiltrate it in vacuum for 12 hours, then take it out and heat it in the oven at 60°C for 5 hours to make the silica sol gelation reaction, and continu...

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Abstract

The present invention relates to a porous ceramic bamboo charcoal absorbing material that is used on the surface of load magnetic metal, and a preparation method thereof, belonging to the field of the absorbing material of electromagnetic wave. The generation of the ceramic surface of the bamboo charcoal, the inner load magnetic metal and the silicon-based ceramic crystal whisker in the pore channel can simultaneously has the functions of three loss mechanisms that comprise resistance, dielectric and magnetic media, so as to effectively absorb electromagnetic radiation.

Description

Technical field: [0001] The invention relates to a surface ceramicized porous bamboo charcoal wave absorbing material loaded with magnetic metal and a preparation method thereof, belonging to the field of electromagnetic wave absorbing materials. Background technique: [0002] In modern warfare, stealth technology has become one of today's cutting-edge military technologies, and the research and application of radar wave absorbing materials (referred to as absorbing materials) is an important part of the development of stealth technology [Kang Feiyu, Zheng Yongping, Peng Junfang, Chinese Patent, 2003 , CN1395466]. There are two main ways to achieve stealth technology: one is to minimize the radar wave scattering cross-section through shape design. However, due to the limitation of tactical technical indicators and environmental conditions, it is quite difficult to carry out ideal design; the second is to apply wave-absorbing materials. Because the development of absorbing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/52C04B41/51H05K9/00
Inventor 陈晓红岳永德刘金明张东升宋怀河
Owner BEIJING UNIV OF CHEM TECH
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