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Thermal press method for preparing zirconium containing carbon base composite material

A composite material and carbon-based technology, which is applied in the processing of coking carbonaceous materials, fibrous fillers, tar pitch/petroleum pitch/natural pitch, etc., can solve the problem of damage, difficulty in finely controlling material uniformity, and inability to give full play to doping Component efficacy and other issues

Inactive Publication Date: 2004-11-17
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method has the following problems: the micropowder used is a particle with a size of 10-50 microns. Because the particle size of the powder is too high, the uniformity of the material is difficult to finely control, and the effect of the doping component cannot be fully exerted; the doping composition and the carbon body There is a more obvious interface between them, which is easy to cause stress concentration and damage during use
As a result, the product quality fluctuates greatly and the yield rate is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] According to the patent "a zirconium-containing pitch and its preparation method" (application number 0116023.3; publication number CN1385494A), coal tar pitch with a softening point of 68°C was reacted with zirconium chloride at a ratio of 100:12 at 350°C for 3 hours That is, pitch with a softening point of 110° C. and a zirconium content of 5 wt % was obtained. Take 150 grams of this asphalt, 850 grams of coke powder calcined to 1200 ° C with a particle size of 100 mesh, and after 24 hours of mechanical mixing and grinding, hot press molding on a hot press at 20 MPa and 2400 ° C to obtain a zirconium-containing carbon-based composite material . The temperature rise curve during hot pressing is: before 450°C, the temperature rise rate is 120°C / hour, during the period from 450 to 2400°C, the temperature rise rate is 250°C / hour, and the temperature is kept at 2400°C for 20 minutes. The density of the material is 1.86g / cm 3 , the bending strength is 25.8Mpa, and the com...

Embodiment 2

[0016] Similar to the method for preparing zirconium-containing pitch in Example 1, take coal tar pitch with a softening point of 68° C., and react with zirconium chloride at a ratio of 100:5 at 350° C. for 3 hours to obtain a softening point of 95° C. and a zirconium-containing 2 wt. % pitch. Take 90 grams of this asphalt, 910 grams of coke powder calcined to 1300 ° C with a particle size of 200 mesh, and after 24 hours of mechanical mixing and grinding, hot press molding on a hot press at 20 MPa and 2600 ° C to obtain a zirconium-containing carbon-based composite material. The temperature rise curve during hot pressing is: before 450°C, the temperature rise rate is 80°C / hour, during the period from 450 to 2600°C, the temperature rise rate is 220°C / hour, and the temperature is kept at 2600°C for 10 minutes. The density of the material is 1.89g / cm 3 , the bending strength is 29.2Mpa, and the compressive strength is 62.6Mpa.

Embodiment 3

[0018] Similar to the method for preparing zirconium-containing pitch in Example 1, take coal tar pitch with a softening point of 68°C, and react with zirconium chloride at a ratio of 100:10 at 350°C for 3 hours to obtain a softening point of 106°C and a zirconium content of 4.2 wt% bitumen. Take 120 grams of this asphalt, 880 grams of coke powder calcined to 1200 ° C with a particle size of 100 mesh, and after 30 hours of mechanical mixing and grinding, hot press molding on a hot press at 30 MPa and 2600 ° C to obtain a zirconium-containing carbon-based composite material. The temperature rise curve during hot pressing is: before 450°C, the heating rate is 100°C / hour, during the period from 450°C to 2600°C, the heating rate is 240°C / hour, and the temperature is kept at 2600°C for 10 minutes. The density of the material is 1.93g / cm 3 , the bending strength is 31.8Mpa, and the compressive strength is 65.1Mpa.

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Abstract

The invention provides a thermal press method for preparing zirconium containing carbon base composite material by employing zirconium-containing asphalt as impregnating agent and binding agent, using incineration pulverized coke as filling material, utilizing hot press forming for preparing zirconium containing carbon base composite material. The advantages of the invention are more homogeneous for the charcoal based composite material, better property, and stabilized product quality.low making cost and high rate of finished products.

Description

technical field [0001] The invention relates to a preparation method of a zirconium-containing carbon-based composite material. Background technique [0002] Carbon and graphite products have the characteristics of low density, high modulus and strength, especially excellent high-temperature mechanical properties, and are widely used in high-tech fields such as aerospace and aviation. However, some properties of carbon materials still have certain deficiencies and need to be further strengthened. Doping is one of the main means to improve the properties of materials, and its process is to add specific elements to carbon materials to form composite materials. [0003] Usually, the production process of carbon-graphite materials is to use fillers and binders, through one-time hot pressing or molding, carbonization, graphitization, and impregnation-carbonization densification processes, and finally make products that meet performance requirements, while carbon fiber Reinforce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/44C10B55/00C10C3/00
Inventor 刘朗史景利
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI