A fe for thermal spraying 3 o 4 -co 3 o 4 Powder Preparation Method

A fe3o4-co3o4, thermal spraying technology, applied in coating, fusion spraying, metal material coating process, etc., can solve the problem of low thermal radiation coefficient of coating of metal parts, achieve high thermal radiation coefficient, stable structure, The effect of increasing the thermal radiation coefficient

Active Publication Date: 2021-09-24
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low thermal radiation coefficient of the metal parts coating in the medical x-ray tube in the prior art, and to provide a Fe coating for thermal spraying. 3 o 4 -Co 3 o 4 The preparation method of powder, the Fe prepared by this method 3 o 4 -Co 3 o 4 Powder is a thermal spraying material structure with uniform particle size distribution, high density, high blackness, high thermal radiation coefficient, stable crystal structure, and low deposition temperature.

Method used

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  • A fe for thermal spraying <sub>3</sub> o <sub>4</sub> -co <sub>3</sub> o <sub>4</sub> Powder Preparation Method
  • A fe for thermal spraying <sub>3</sub> o <sub>4</sub> -co <sub>3</sub> o <sub>4</sub> Powder Preparation Method
  • A fe for thermal spraying <sub>3</sub> o <sub>4</sub> -co <sub>3</sub> o <sub>4</sub> Powder Preparation Method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A Fe for thermal spraying 3 o 4 -Co 3 o 4 The preparation method of powder, comprises the following steps:

[0027] (1) Fe 3 o 4 Impurity removal: select Fe with a purity of more than 99% and a particle size of 1 μm 3 o 4 Commercially available mechanical crushing powder. Because it contains a certain amount of impurity elements, such as S, Si and so on. Fe 3 o 4 The powder is first heat-treated to remove Fe 3 o 4 The volatile impurities contained in the powder are further removed by chemical impregnation to obtain purified Fe 3 o 4 powder; the specific steps are: the original Fe 3 o 4 The powder is put into a heat treatment furnace, and under the protection of an inert atmosphere, the temperature is raised to 450 ° C, and the heat treatment time is 3 hours to remove the original Fe 3 o 4 The volatile impurities in the powder are removed, cooled naturally, and the first-grade Fe is obtained 3 o 4 Purified powder; then the primary Fe 3 o 4 The purifi...

Embodiment 2

[0034] This embodiment is basically the same as Embodiment 1, the difference is:

[0035] In the batching, the following powders are batched according to weight percentage, 88% of the purified Fe 3 o 4 Powder, 12% ZIF-67 powder.

Embodiment 3

[0037] This embodiment is basically the same as Embodiment 1, the difference is:

[0038] In the batching, the following powders are batched according to weight percentage, 92% of the purified Fe 3 o 4 Powder, 8% ZIF-67 powder.

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Abstract

The invention provides a Fe for thermal spraying 3 o 4 ‑Co 3 o 4 Method of preparation of powders, including Fe 3 o 4 The steps of impurity removal, batching, emulsification pulping, spray drying, high-temperature sintering, and densification, the present invention is based on Fe 3 o 4 A small amount of ZIF-67 powder is added to the powder as an improvement, and the Fe 3 o 4 The powder and ZIF‑67 powder are evenly combined, and the ZIF‑67 powder is converted into a hollow dodecahedral Co by gradient sintering 3 o 4 , compared to pure Fe 3 o 4 The heat radiation coefficient of the thermal sprayed coating formed by powder is greatly improved. In addition, Fe 3 o 4 ‑Co 3 o 4 The denser structure of the powder is more stable, which further improves the thermal radiation coefficient of the coating. The final result is a powder material with a composite thermal spray coating with a thermal emissivity coefficient as high as 0.90‑0.96.

Description

technical field [0001] The invention belongs to the technical field of thermal spraying materials, in particular to a Fe material used for thermal spraying 3 o 4 -Co 3 o 4 Method of powder preparation. Background technique [0002] The rotating anode X-ray tube is a high-vacuum electric vacuum device. Its working principle is to apply a high voltage (generally 125-150kV) to the positive and negative terminals of the X-ray tube, and the electron beam emitted by the cathode is under the action of a high-vacuum high-voltage electric field. , X-rays are generated by electron bombardment to the anode target surface, only a small part of the kinetic energy of the electrons bombarded on the anode surface is converted into X-rays, and about 98% of the kinetic energy of the electrons is converted into heat energy through a complex energy conversion process, making the temperature of the ray tube rise rapidly. Since the X-ray tube is a vacuum device, the heat conduction in the tu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/11C23C4/12
CPCC23C4/12C23C4/11
Inventor 杨平陈梅侯蕊
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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