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

Nickel-encapsulated boron and nitrogen co-doped carbon nanotube wave-absorbing material and preparation method thereof

A technology of carbon nanotubes and wave absorbing materials, applied in the field of wave absorbing materials, can solve the problems such as the inability to realize large-scale mass production of carbon nanotubes, which is unfavorable for industrial production, and achieve the realization of large-scale large-scale production and equal distribution of pipe diameters. , the effect of simple synthesis process

Inactive Publication Date: 2021-09-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for easy control over how well different types of materials are made from small particles called carbon tubules (CNTs). By heat treating them with specific conditions or chemical agents it becomes possible to create tiny structures like CNT's without damaging their properties. These techniques make producing these materials more efficient than previous methods while also allowing for larger amounts of such materials to be massively prepared at once.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the ability for absorbing electric fields without causing excessive temperature rise or degradations over longer periods of operation due to high thermal impedances associated with conventional materials like ferrite/ferritum type alloys.

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
  • Nickel-encapsulated boron and nitrogen co-doped carbon nanotube wave-absorbing material and preparation method thereof
  • Nickel-encapsulated boron and nitrogen co-doped carbon nanotube wave-absorbing material and preparation method thereof
  • Nickel-encapsulated boron and nitrogen co-doped carbon nanotube wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of the nickel-encapsulated boron and nitrogen co-doped carbon nanotube wave-absorbing material of the present invention comprises the following steps:

[0033] Step 1: Dissolve 2.38g nickel chloride hexahydrate in 20ml water and stir well.

[0034] Step 2: Dissolve 0.76g sodium borohydride and 0.08g sodium hydroxide in 20ml water and mix well. Slowly and uniformly drop the prepared solution into the prepared solution in step 1 to obtain a black nickel boride precipitate.

[0035] Step 3: wash the nickel boride precipitate obtained in step 2 with ethanol and water, filter, and dry in an oven at 80°C.

[0036] Step 4: Mix 0.3846g of the clean nickel boride obtained in step 3 with 5.045g of dicyandiamide and grind them evenly.

[0037] Step 5: Transfer the mixture obtained in step 4 into a porcelain boat, and heat-treat it under inert gas. Min rise 700 ℃ heat preservation 2h, natural cooling, you can get a black powder material, that is, carbon na...

Embodiment 2

[0040] The preparation method of the nickel-encapsulated boron and nitrogen co-doped carbon nanotube wave-absorbing material of the present invention comprises the following steps:

[0041] Step 1: Dissolve 2.38g nickel chloride hexahydrate in 20ml water and stir well.

[0042] Step 2: Dissolve 0.76g sodium borohydride and 0.08g sodium hydroxide in 20ml water and mix well. Slowly and uniformly drop the prepared solution into the prepared solution in step 1 to obtain nickel boride precipitation.

[0043] Step 3: wash the nickel boride precipitate obtained in step 2 with ethanol and water, filter, and dry in an oven at 80°C.

[0044] Step 4: Mix 0.3846g of the clean nickel boride obtained in step 3 with 5.045g of dicyandiamide and grind them evenly.

[0045] Step 5: Transfer the mixture obtained in step 4 into a porcelain boat, and heat-treat it under inert gas. Min liter 800 ℃ heat preservation 2h, natural cooling, you can get the black powder material.

[0046] The carbon ...

Embodiment 3

[0048] The preparation method of the nickel-encapsulated boron and nitrogen co-doped carbon nanotube wave-absorbing material of the present invention comprises the following steps:

[0049] Step 1: Dissolve 2.38g nickel chloride hexahydrate in 20ml water and stir well.

[0050] Step 2: Dissolve 0.76g sodium borohydride and 0.08g sodium hydroxide in 20ml water and mix well. Slowly and uniformly drop the prepared solution into the prepared solution in step 1 to obtain nickel boride precipitation.

[0051] Step 3: wash the nickel boride precipitate obtained in step 2 with ethanol and water, filter, and dry in an oven at 80°C.

[0052] Step 4: Mix 0.3846g of the clean nickel boride obtained in step 3 with 5.045g of dicyandiamide and grind them evenly.

[0053] Step 5: Transfer the mixture obtained in step 4 into a porcelain boat, and heat-treat it under inert gas. Incubate at 900°C for 2 hours, cool naturally to obtain black powdery material.

[0054] The diameter of the carbo...

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
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a nickel-encapsulated boron and nitrogen co-doped carbon nanotube wave-absorbing material and a preparation method thereof. The method comprises the steps of dissolving sodium hydroxide and sodium borohydride in water, and uniformly mixing to obtain a solution; slowly and uniformly dropwise adding the prepared solution into an aqueous solution of nickel chloride hexahydrate in a mechanical stirring process, precipitating nickel boride in the solution, and filtering, cleaning and drying to obtain nickel boride; mixing nickel boride and dicyandiamide in proportion, and grinding uniformly; and carrying out high-temperature calcination treatment on the uniformly mixed mixture of nickel boride and dicyandiamide in an inert atmosphere to obtain the final material. The method disclosed by the invention is simple in process and high in repeatability, and the prepared nickel-encapsulated boron and nitrogen co-doped carbon nanotube wave-absorbing material has the characteristics of light weight, corrosion resistance, good wave-absorbing performance and the like. The prepared carbon nanotube is uniform in tube diameter, has magnetic loss due to doping of nickel, and has excellent electromagnetic wave-absorbing performance as a wave-absorbing material.

Description

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

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
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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