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Method for preparing powder of nanometer tantalum carbide

A nano-tantalum carbide and powder technology is applied in the field of non-metallic materials, which can solve the problems of high energy consumption, inability to prepare nano-tantalum carbide powder, and high investment cost, and achieve the effects of low energy consumption, solving preparation problems and small equipment investment.

Inactive Publication Date: 2011-08-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the traditional preparation method of tantalum carbide powder has high investment cost, large energy consumption and inability to prepare nanometer tantalum carbide powder

Method used

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  • Method for preparing powder of nanometer tantalum carbide
  • Method for preparing powder of nanometer tantalum carbide
  • Method for preparing powder of nanometer tantalum carbide

Examples

Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, 1.00 g of tantalum pentachloride is placed in a beaker, 10 ml of absolute ethanol is added to the beaker and stirred evenly with a glass rod, then the beaker is placed in an ultrasonic cleaner, and the heating temperature is set to 55°C , the operating frequency is 40kHz, the ultrasonic power is 80W, after ultrasonic oscillation for 5 minutes, a liquid phase precursor is made, and 0.20 g of activated carbon powder with a particle size of 24 nanometers is added to the liquid phase precursor, and ultrasonic oscillation is continued for 20 minutes;

[0031] Transfer the mixed liquid to a 95 porcelain crucible, and distribute it on the inner wall of the crucible as evenly as possible, and dry it slowly with a hot air blower;

[0032] Put the crucible into a vacuum furnace, perform high-temperature treatment on it under a vacuum of 100 Pa, the heating rate is 20°C / min, heat up to 1300°C for 0.5 hours, and cool with the furnace; take out the crucible, and u...

Embodiment 2

[0035] In this embodiment, 1.00 g of tantalum pentachloride is placed in a beaker, 20 ml of absolute ethanol is added to the beaker and stirred evenly with a glass rod, then the beaker is placed in an ultrasonic cleaner, and the heating temperature is set to 65°C , the operating frequency is 40kHz, the ultrasonic power is 90W, after ultrasonic oscillation for 8 minutes, a liquid phase precursor is made, and 0.40 g of activated carbon powder with a particle size of 24 nanometers is added to the liquid phase precursor, and ultrasonic oscillation is continued for 30 minutes;

[0036] Transfer the mixed liquid to a 95 porcelain crucible, and distribute it on the inner wall of the crucible as evenly as possible, and dry it slowly with a hot air blower;

[0037] Put the crucible into a vacuum furnace, carry out high-temperature treatment on it under a vacuum of 100 Pa, the heating rate is 15°C / min, heat it up to 1200°C for 4 hours, and cool down with the furnace; take out the crucibl...

Embodiment 3

[0040] In this embodiment, 0.50 g of tantalum pentachloride is placed in a beaker, 5 ml of absolute ethanol is added to the beaker and stirred evenly with a glass rod, then the beaker is placed in an ultrasonic cleaner, and the heating temperature is set to 50°C , the operating frequency is 40kHz, the ultrasonic power is 85W, after ultrasonic oscillation for 3 minutes, a liquid phase precursor is made, and 0.10 g of activated carbon powder with a particle size of 24 nanometers is added to the liquid phase precursor, and ultrasonic oscillation is continued for 15 minutes;

[0041] Transfer the mixed liquid to a 95 porcelain crucible, and distribute it on the inner wall of the crucible as evenly as possible, and dry it slowly with a hot air blower;

[0042] Put the crucible into a vacuum furnace, carry out high-temperature treatment on it under a hydrogen atmosphere, the heating rate is 25°C / min, heat up to 1300°C for 0.5 hours, and cool with the furnace; take out the crucible, a...

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Abstract

The invention provides a method for preparing powder of nanometer tantalum carbide and belongs to the field of non-metallic materials. The method for preparing the powder of nanometer tantalum carbide comprises the following steps of: placing tantalic chloride in a container, adding absolute ethyl alcohol and evenly stirring, and placing the container containing the liquid in an ultrasonic cleaner to perform ultrasonic oscillation for 3 to 10 minutes to obtain a liquid phase precursor; adding nanometer-grade powder of active carbon to the liquid phase precursor, continuing the ultrasonic oscillation for 10 to 40 minutes, transferring the liquid phase precursor to a crucible and making the liquid phase precursor arranged on the inner wall of the crucible as evenly as possible, and using a hot air heater to slowly dry the liquid phase precursor; placing the crucible in a vacuum furnace for high temperature treatment in a non-oxidation atmosphere, heating the crucible to the temperature of between 1,200 and 1,300 DEG C and then kept the temperature for 0.5 and 4 hours, and cooling the crucible along with the cooling of the furnace; and finally obtaining the powder of tantalum carbideof which the average grain size is between 50 and 80 nanometers. The method has the advantages of low equipment cost, simple process and low energy consumption, and effectively solves the problem of preparing the powder of nanometer tantalum carbide.

Description

technical field [0001] The invention belongs to the field of non-metallic materials, relates to a preparation method of tantalum carbide, in particular provides a method and a product for preparing nano tantalum carbide powder in a non-oxidizing atmosphere by adding nano activated carbon to a liquid phase precursor. Background technique [0002] Tantalum carbide is a transition metal carbide with excellent physical and chemical properties, such as high hardness, high melting point, good electrical conductivity and thermal shock resistance, good chemical corrosion resistance, high oxidation resistance, etc. Due to the excellent characteristics of tantalum carbide, it is widely used in industry. [0003] Tantalum carbide has important uses in the coating industry. It can be used as jet engine turbine blade and rocket nozzle coating, which can significantly improve its ablation resistance and prolong service life. The powder added to the coating is generally ultrafine powder. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/30
Inventor 沈卫平马明亮王青云葛昌纯
Owner UNIV OF SCI & TECH BEIJING