In situ preparation of 3D carbide nanowire arrays by immersion pyrolysis and magnetic pulling of precursors

A technology of nanowire array and impregnation cracking, which is applied in the field of precursor impregnation cracking and magnetic pulling method to prepare 3D carbide nanowire array in situ, which can solve the limitation of one-dimensional carbide nanomaterial design and one-dimensional nanomaterial growth Uncontrollable direction and other problems, to achieve the effect of improving anti-oxidation and anti-ablation performance, controllable growth direction, and good crystallinity

Active Publication Date: 2021-10-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the biggest disadvantage of one-dimensional nanomaterials is that the growth direction is uncontrollable, which severely limits the designability of one-dimensional carbide nanomaterials.

Method used

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  • In situ preparation of 3D carbide nanowire arrays by immersion pyrolysis and magnetic pulling of precursors
  • In situ preparation of 3D carbide nanowire arrays by immersion pyrolysis and magnetic pulling of precursors
  • In situ preparation of 3D carbide nanowire arrays by immersion pyrolysis and magnetic pulling of precursors

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The high-purity graphite sheet was cut into a sheet of 20 × 20 × 5 mm by a cutter, and the graphite sheet was placed in a beaker containing alcohol, and then washed in an ultrasonic cleaning device for 30 min. It is weighed in the bicycle of nerves and the nine-water nitrate, which is dissolved in the beaker with deionized water, wherein the molar ratio of urea and nine-water nitrate is 3: 2, magnetic force for 30 min, and then move the solution into the graphite sheet. Polytetrafluorine liner, blocking kettle. The reactor was placed in an oven, the maximum temperature of the oven was 120 ° C, and the constant temperature was 1 h. The graphite sheet in the reactor was taken, and it was dried, and the temperature of the hydrogen reduction was placed in the horizontal heat treatment furnace, and the reduction time was 1 h, the reduction time was transferred simultaneously, the flow ratio of the two gases To 2: 1. When the temperature drops to room temperature, a large amount ...

Embodiment 2

[0054] The high-purity graphite sheet was cut into a sheet of 20 × 20 × 5 mm with a cutting machine, and the graphite sheet was placed in a beaker containing alcohol, and then washed in an ultrasonic cleaning device for 60 min. It is weighed with a number of glycin and nine-water nitrate, which is dissolved in the beaker with deionized water, wherein the molar ratio of urea and nine-water nitrate is 3: 2, magnetic force is stirred for 60 min, and then the solution is moved into the graphite sheet. Polytetrafluorine liner, blocking kettle. The reactor was placed in an oven, and the maximum temperature of the oven was 180 ° C, and the temperature was 3 h. The graphite sheet in the reactor was taken, and it was dried, and the temperature of the hydrogen reduction was 700 ° C in the horizontal heat treatment furnace, and the reduction time was 3 h, the hydrogen gas was simultaneously introduced, and the flow rate ratio of the two gases. To 2: 1. When the temperature drops to room temp...

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Abstract

The invention relates to a method for in-situ preparation of 3D carbide nanowire arrays by impregnating and cracking precursors and magnetic pulling method. The three-dimensional carbide nanowire arrays are synthesized in situ on the surface of graphite sheets by combining precursor impregnating cracking and magnetic pulling methods. method. Prepare nano-scale iron oxide on the surface of high-purity graphite sheet by co-precipitation method, and then prepare nano-Fe particles by hydrogen reduction; then impregnate graphite sheet containing Fe particles in ZrC precursor, and then heat treatment in a magnetic field environment. ZrC nanowire arrays were obtained. The invention has simple preparation method, designable nanowires, no pollution, safety and stability, improves the field emission performance and electromagnetic wave absorption performance of the carbide nanomaterial, reduces the field emission turn-on voltage of the material, and enhances the combination of the matrix and the coating. It is widely used in ceramic matrix composite materials, resin matrix composite materials, field emitter shoe materials and hard alloys, and has good economic and social benefits.

Description

Technical field [0001] The present invention pertains to a precursor macerated situ prepared magnetic pull carbide nanowire array in three-dimensional composite materials, functional materials and application technology art alloy, to a precursor and macerated in situ process for preparing a magnetic pull 3D carbonized an array of nanowires, the method using a precursor in combination with a magnetic pull macerated wears, in situ synthesis method of a three-dimensional array of nanowires carbide graphite sheet surface. Background technique [0002] Carbide having a high melting point nanomaterials, temperature greater specific strength and specific modulus, good absorbing properties, excellent thermal properties, chemical stability, etc., are widely used in aerospace, military, medical and construction. Carbide carbon electronegative element, or close to the generated binary compounds (other than hydrogen) is smaller than it, the properties of metal carbide elements is divided and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/914
CPCC01P2004/03C01P2004/16C01P2006/40C01P2006/42C01B32/914
Inventor 付前刚闫宁宁史小红李贺军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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