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Tantalum charcoal material precursor preparation method

A technology of asphalt and coal tar pitch, which is applied in the field of preparation of tantalum-containing carbon-based composite material precursors, can solve problems such as dispersion in the molecular state, and achieve high element utilization and excellent performance

Inactive Publication Date: 2007-05-30
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Although the existing form of tantalum has been greatly improved compared with the traditional mechanical physical mixing, it has not yet achieved complete dispersion of the molecular state.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take 200 grams of coal tar pitch with a softening point of 60° C., 20 grams of tantalum pentaethoxide and 2 grams of ethanol, stir at 150° C. for 2 hours, further heat up to 350° C. and polycondense for 5 hours to obtain tantalum-containing pitch with a product yield of 95.5%. . The softening point of the pitch is 80°C, the content of tantalum is 2.17wt%, and the carbon production rate is 50.0wt%. The softening point of tantalum-containing pitch is determined according to GB2294-80, and the carbonization residue is determined according to GB8729-89, the same below.

Embodiment 2

[0016] Take 200 grams of coal tar pitch with a softening point of 80 ° C, 80 grams of tantalum pentaethoxide and 16 grams of n-butanol, stir at 200 ° C for 2 hours, and further heat up to 350 ° C for 2 hours to obtain tantalum-containing pitch, and the product yield is 97.2 %. The softening point of the pitch is 122°C, it contains tantalum 4.40wt%, and the carbon yield is 52.4wt%.

Embodiment 3

[0018] Take 200 grams of petroleum asphalt with a softening point of 50 ° C, 60 grams of tantalum pentaethoxide and 12 grams of ethanol, stir at 250 ° C for 3 hours, further heat up to 400 ° C and polycondense for 4 hours to obtain the raw material of tantalum-containing pitch, and the product yield is 90.5 %. The softening point of the pitch is 90°C, the content of tantalum is 3.32wt%, and the carbon yield is 54.8wt%.

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Abstract

The invention provides a method for preparing precursor of titanium-containing carbon material, which comprises mechanically agitating coal-tar asphalt with a softening point of 60-80 deg C, petroleum asphalt with a softening point of 50-70 deg C, penta ethyoxyl tantalum or Ta(OC4H9)5 and assisting solvent at 150-250 deg. C, in inert atmosphere and anhydrous environment, homogeneously mixing, carrying out thermal polycondensation reaction for 2-5 hours at 350-450 deg. C. The advantage of the invention includes that molecular bonding between organic tantalum and asphalt molecules can be achieved.

Description

technical field [0001] The invention belongs to a method for preparing a tantalum-containing carbon-based composite material precursor, in particular to a method for preparing a tantalum-containing carbon material precursor by eutectic mixing of pitch and organic tantalum. Background technique [0002] Carbon-based composite materials have the advantages of good dimensional stability, high specific strength at high temperature, easy processing, light weight and low price, and are widely used as high-temperature structural materials. However, ablation in an oxidizing atmosphere higher than 800 °C seriously hinders its application. Therefore, it is necessary to improve the ablation resistance of carbon materials to meet the requirements of carbon materials in extreme environments and expand their application range. [0003] The United States pointed out in the AIAA "Carbon / Carbon Materials for Solid Propulsion Rocket Motor" report No. 76-609 in 1976 that the introduction of ta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/02
Inventor 刘朗李秀涛史景利郭全贵
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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