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Preparation method of core-shell carbon-coated micro-nano zirconium powder

A carbon coating, micro-nano technology, applied in the field of micro-nano metal powder coating, can solve problems such as difficult to meet application requirements, high equipment requirements, complex process, etc. simple effect

Inactive Publication Date: 2017-10-27
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relevant studies have been reported at home and abroad, such as the invention patent 201610228036.4, which uses the atomic layer deposition method to prepare carbon-coated zirconium powder particles, but this method requires high equipment, complex processes and low output, which is difficult to meet the application requirements.

Method used

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  • Preparation method of core-shell carbon-coated micro-nano zirconium powder
  • Preparation method of core-shell carbon-coated micro-nano zirconium powder
  • Preparation method of core-shell carbon-coated micro-nano zirconium powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 0.2g of levodopa in 100mL of water, heat to dissolve it completely, and add 2.0g of zirconium powder with an average particle size of 5μm into the dopa solution, stir for 30min and wait for uniform dispersion, then adjust the pH of the system to 9 with concentrated ammonia water ~11, Stir and react at room temperature for 24 hours, let stand, centrifuge, pour out the supernatant after layering, wash the solid with water for several times until neutral and colorless and transparent, put it in a vacuum oven to dry;

[0025] Under an argon atmosphere, the obtained precursor was placed in a tube furnace, the temperature was programmed to rise to 400°C at 5°C / min, kept for 2 hours, and then heated to 650°C for 4 hours to obtain core-shell carbon-coated micro-nano zirconium powder.

Embodiment 2

[0027] Weigh 0.1g of levodopa in 100mL of water, heat to dissolve it completely, and add 2.0g of zirconium powder with an average particle size of 5μm into the dopa solution, stir for 30min and wait for uniform dispersion, then adjust the pH of the system to 9 with concentrated ammonia water ~11, Stir and react at room temperature for 24 hours, let stand, centrifuge, pour out the supernatant after layering, wash the solid with water for several times until neutral and colorless and transparent, put it in a vacuum oven to dry;

[0028] Under an argon atmosphere, the obtained precursor was placed in a tube furnace, the temperature was programmed to rise to 400°C at 10°C / min, kept for 2 hours, and then heated to 650°C for 4 hours to obtain core-shell carbon-coated micro-nano zirconium powder.

Embodiment 3

[0030] Weigh 0.1g of levodopa in 100mL of water, heat to dissolve it completely, and add 2.0g of zirconium powder with an average particle size of 80nm into the dopa solution, stir for 30min and wait for uniform dispersion, then adjust the pH of the system to 9 with concentrated ammonia water ~11, Stir and react at room temperature for 24 hours, let stand, centrifuge, pour out the supernatant after layering, wash the solid with water for several times until neutral and colorless and transparent, put it in a vacuum oven to dry;

[0031] Under an argon atmosphere, the obtained precursor was placed in a tube furnace, the temperature was programmed to rise to 400°C at 5°C / min, kept for 2 hours, and then heated to 650°C for 4 hours to obtain core-shell carbon-coated micro-nano zirconium powder.

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Abstract

The invention discloses a preparation method of core-shell carbon-coated micro-nano zirconium powder. The preparation method comprises the following steps that 1, a carbon source levodopa is auto-polymerized on the surface of the zirconium powder; 2, the core-shell carbon-coated micro-nano zirconium powder is prepared through calcination. The carbon-coated micro-nano zirconium prepared by adopting the method has an obvious core-shell structure. In addition, the reaction conditions of the method are mild, and the process is simple and easy to achieve. The problem of environmental sensitivity and use safety, brought by high chemical reactivity, of the micro-nano zirconium powder are effectively solved, the electrostatic spark sensitivity of the powder is reduced to the most degree, and application of the powder in solid propellant fuel is promoted.

Description

technical field [0001] The invention relates to a coating method of micronano metal powder, in particular to a coating method of micronano zirconium powder. Background technique [0002] Micro-nano metal powder has been widely used as fuel in modern energetic systems, and it is one of the important ways to improve the energy performance of the system. The application of metal powder in solid propellant can not only increase the detonation heat and density, improve combustion efficiency, but also produce solid metal oxide particles, which can also inhibit oscillation combustion and improve the combustion stability of propellant. With the emergence of some explosives with special requirements for density, zirconium has more application advantages than other metals due to its high density, high volume calorific value, and good flammability, especially in ramjet engines and limited volumes. It has broad application prospects in solid rocket motors. [0003] Although zirconium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B82Y40/00
CPCB82Y40/00B22F1/07B22F1/16
Inventor 姜菡雨赵凤起曲文刚郝海霞徐司雨轩春雷姚二岗李恒
Owner XIAN MODERN CHEM RES INST
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