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Preparation method of carbon nanotube/ceramic matrix composite material

A technology of carbon nanotubes and composite materials, which is applied in the field of preparation of carbon nanotubes/ceramic matrix composites, which can solve problems such as uneven dispersion, affecting the performance of composite materials, and the inability to disperse carbon nanotubes and ceramic powders. good effect

Inactive Publication Date: 2019-06-07
TSINGHUA UNIV
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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that carbon nanotubes and ceramic powder cannot be dispersed in the same dispersion environment, resulting in uneven dispersion and affecting the performance of composite materials, thereby providing a carbon Nanotubes and ceramic powder are dispersed under the same dispersion conditions and environment, carbon nanotubes are evenly distributed in the ceramic green body, and a method for preparing a carbon nanotube / ceramic matrix composite material with excellent composite performance

Method used

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  • Preparation method of carbon nanotube/ceramic matrix composite material
  • Preparation method of carbon nanotube/ceramic matrix composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Carbon nanotube / alumina composite ceramics were prepared with isobam 104 as dispersant.

[0034] Mix 1 g of carbon nanotubes, 0.05 g of isobam 104 and 20 g of water, add ammonia water to adjust the pH to 9.5, and stir ultrasonically for 12 hours to obtain a carbon nanotube suspension for use. Mix 198.1 grams of alumina powder, 0.6 grams of isobam 104, 30 grams of water and the above suspension of carbon nanotubes, adjust the pH value to 9.5 with ammonia water, and ball mill for 24 hours to obtain a solid phase content of 50% by volume. %, the mass of carbon nanotubes accounts for 0.5% of the mass of ceramic powder. The obtained mixed suspension was vacuum-degassed for 45 minutes, injected into a non-porous metal mold, treated in a water bath at 70° C. for 1 hour, and demoulded to obtain a wet body of a composite ceramic material. The obtained wet body of the composite ceramic material was placed at room temperature for 12 hours, then put into an oven, and dried at 80° ...

Embodiment 2

[0037] Carbon nanotube / silica composite ceramics were prepared with isobam 104 as dispersant.

[0038] Mix 1.62 grams of carbon nanotubes, 0.08 grams of isobam 104 and 24 grams of water, add ammonia water to adjust the pH value to 10.5, and ultrasonically stir for 12 hours to obtain a suspension of carbon nanotubes for use. Mix 135.7 grams of silicon oxide powder, 0.81 grams of isobam104, 24 grams of water and the above suspension of carbon nanotubes, adjust the pH value to 10.5 with ammonia water, and ball mill for 24 hours to obtain a solid phase content of 52% in volume percentage , the mixed suspension in which the mass of carbon nanotube accounts for 1.2% of the mass of ceramic powder. The obtained mixed suspension was vacuum degassed for 15 minutes, injected into a non-porous metal mold, treated in a water bath at 70° C. for 1 hour, and a wet body of a composite ceramic material was obtained after demoulding. The obtained wet body of the composite ceramic material was p...

Embodiment 3

[0041] Carbon nanotube / zirconia composite ceramics were prepared with isobam 600 as dispersant.

[0042] Mix 0.9 g of carbon nanotubes, 0.045 g of isobam 600 and 15 g of water, add ammonia water to adjust the pH value to 10, and ultrasonically stir for 12 hours to obtain a suspension of carbon nanotubes for use. Mix 297.45 grams of zirconia powder, 1.18 grams of isobam600, 35 grams of water and the above suspension of carbon nanotubes, adjust the pH value to 10 with ammonia water, and ball mill for 24 hours to obtain a solid phase content of 50% in volume percentage , the mixed suspension in which the mass of carbon nanotube accounts for 0.3% of the mass of ceramic powder. The obtained mixed suspension was vacuum degassed for 30 minutes, injected into a non-porous metal mold, treated in a water bath at 70° C. for 1 hour, and demoulded to obtain a wet body of a composite ceramic material. The obtained wet body of the composite ceramic material was placed at room temperature fo...

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Abstract

The invention provides a preparation method of a carbon nanotube / ceramic matrix composite material, which comprises the following steps: S1, mixing a carbon nanotube, water, a dispersant and a pH regulator, and ultrasonic stirring to obtain a carbon nanotube suspension; S2, mixing and ball milling that carbon nanotube suspension, a ceramic powder, the water, the dispersant and the pH regulator toobtain a mixed suspension; S3, vacuum degassing that mixed suspension, injecting the mixture suspension body into a mold, water bath treatment and demoulding to obtain a wet blank of the composite ceramic material; S4, drying that wet blank of the composite ceramic material to obtain a dry blank of the composite ceramic material; S5, sintering that dry blank of the composite ceramic material to obtain the composite ceramic material; wherein the dispersant is a basic water-soluble polymer of isobutylene and maleic anhydride. By adopting the dispersant, the carbon nanotubes and the ceramic powder can be dispersed under the same conditions, and the carbon nanotubes are uniformly distributed in the ceramic blank, thereby preparing a composite material with excellent performance.

Description

technical field [0001] The invention relates to the technical field of solidification of inorganic non-metallic material suspensions, in particular to a method for preparing a carbon nanotube / ceramic matrix composite material. Background technique [0002] Since the discovery of carbon nanotubes in 1991, researchers from all over the world have attracted extensive attention. Because carbon nanotubes have excellent mechanical properties and unique electrical and optical properties, they play a variety of roles in composite materials. By combining carbon nanotubes with ceramic materials, the performance of ceramic materials can be significantly improved. [0003] The existing carbon nanotube / ceramic matrix composite material preparation technology includes methods for preparing composite materials such as heterocoagulation, vapor deposition and colloidal molding technology. The heterocoagulation method requires the use of different dispersants to disperse carbon nanotubes an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80
Inventor 杨金龙干科杨洁鲁毓钜张笑妍任博陈雨谷王亚利
Owner TSINGHUA UNIV
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