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Preparation method of carbon nanotube toughened boron carbide ceramic

A technology of boron carbide ceramics and carbon nanotubes, applied in the field of composite materials, can solve the problems of high cost and difficult industrialization, and achieve the effect of low production cost and excellent performance

Inactive Publication Date: 2020-04-17
赛福纳米科技(徐州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the production of composite ceramics based on boron carbide still faces many problems, and the cost is high, making it difficult to industrialize

Method used

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  • Preparation method of carbon nanotube toughened boron carbide ceramic
  • Preparation method of carbon nanotube toughened boron carbide ceramic
  • Preparation method of carbon nanotube toughened boron carbide ceramic

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Embodiment 1

[0027] This embodiment relates to a preparation method of carbon nanotube toughened boron carbide ceramics, the specific process is as follows:

[0028] S1, 100g carbon nanotubes (SEM photo as figure 2 Shown) mixes with 850g carbon black and obtains mixture, and the SEM photo of mixture is as image 3 As shown, put it into the synthesis chamber, put 2.5kg of chemically pure boric acid powder into the preheating chamber, connect the preheating chamber, synthesis chamber and condensation chamber through the flange and vacuumize and seal them. The connection is filled with porous graphite insulation felt coated with boron carbide, such as figure 1 shown;

[0029] S2, continuously feed argon gas from the preheating chamber to the synthesis chamber at a flow rate of 0.5L / min, then heat the preheating chamber and synthesis chamber to a temperature of 400°C, and heat the condensation chamber until the temperature reaches 100°C. The boric acid powder decomposes to produce water va...

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Abstract

The invention discloses a preparation method of carbon nanotube toughened boron carbide ceramic, which belongs to the technical field of composite materials. The preparation method of the carbon nanotube toughened boron carbide ceramic comprises the following steps: S1, uniformly mixing carbon nanotubes and carbon black in proportion, putting a mixture into a synthesis cavity, and putting boric acid powder into a preheating cavity; S2, continuously introducing inert gas into the synthesis cavity from the preheating cavity, then heating the synthesis cavity to a set temperature, then heating the preheating cavity to a set temperature, and carrying out a reaction; S3, naturally cooling to room temperature, opening the synthesis cavity, and taking out the high-purity boron carbide / carbon nanotube composite material; and S4, adding water and glucose into the high-purity boron carbide / carbon nanotube composite material, carrying out ball milling, uniformly mixing, carrying out spray granulation, carrying out cold press molding, and carrying out vacuum hot press sintering to obtain the high-toughness and high-hardness carbon nanotube toughened boron carbide ceramic. According to the method, the carbon nanotube toughened boron carbide ceramic can be efficiently prepared.

Description

technical field [0001] The invention relates to a technology in the field of composite materials, in particular to a method for preparing carbon nanotube toughened boron carbide ceramics. Background technique [0002] Boron carbide has the advantages of high melting point, low density, high strength, large neutron absorption cross section, excellent thermoelectric performance and good mechanical stability, and its hardness is second only to diamond and cubic boron nitride. Grinding technology and other fields have a wide range of applications. However, at present, the production of composite ceramics based on boron carbide still faces many problems, and the cost is high, making it difficult to industrialize. [0003] In order to solve the above-mentioned problems existing in the prior art, the present invention comes from this. Contents of the invention [0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a method for prepa...

Claims

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Application Information

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IPC IPC(8): C04B35/563C04B35/622C04B35/626C04B35/645
CPCC04B35/563C04B35/622C04B35/62675C04B35/6268C04B35/645C04B2235/422C04B2235/5445C04B2235/602C04B2235/656C04B2235/6581C04B2235/77C04B2235/96
Inventor 刘媛王金娥董明
Owner 赛福纳米科技(徐州)有限公司
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