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Preparation method and application of Fe3O4 coating with improved thermal radiation coefficient

A heat radiation coefficient, fe3o4-tio2 technology, applied in coatings, X-ray tube parts, metal material coating process, etc., can solve the problem of low heat radiation coefficient, low heat radiation coefficient of coating, and easy peeling off of coating And other issues

Active Publication Date: 2020-05-15
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the X-ray tube is a vacuum device, the heat conduction in the tube is quite unsatisfactory
[0003] In order to conduct a large amount of heat generated by the rotating anode X-ray tube to the insulating medium oil layer outside the vacuum tube in time, a coating process is adopted on the surface of the CT tube, but the performance effect of the existing coating in the vacuum environment is not good. It needs to be further improved, specifically in: the bonding strength between the coating and the substrate is low in a vacuum environment, the coating is easy to fall off, and the thermal radiation coefficient is low in a high temperature environment.
[0004] Fe 3 o 4 The coating has attracted people's attention in recent years because of its simple process, low cost and good performance, but pure Fe 3 o 4 The thermal radiation coefficient of the coating cannot meet the above-mentioned problems, and it needs to be modified to enhance its thermal radiation performance

Method used

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  • Preparation method and application of Fe3O4 coating with improved thermal radiation coefficient
  • Preparation method and application of Fe3O4 coating with improved thermal radiation coefficient
  • Preparation method and application of Fe3O4 coating with improved thermal radiation coefficient

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Experimental program
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Effect test

Embodiment 1

[0050] The reagents used in this embodiment are all commercially available, and the deposition equipment is an L5 electron beam physical vapor deposition (EB-PVD) equipment manufactured by the Ukrainian Paton Welding Institute.

[0051] A kind of Fe that improves thermal radiation coefficient 3 o 4 The preparation method of coating specifically comprises the following steps:

[0052] S1: Substrate processing:

[0053] S11: First polish the surface of the substrate with 2000-mesh water sandpaper to remove scale, and then polish with 2000-mesh metallographic sandpaper to remove rough scratches on the surface;

[0054] S12: Ultrasonic cleaning the substrate in acetone for 20-30 minutes to remove surface oil stains;

[0055] S13: Wash with deionized water, insert it into the card slot after air drying, and wait for coating.

[0056] S2: Material preparation:

[0057] S21: Preparation of nanoscale Fe 3 o 4 、TiO 2 :

[0058] S211: Preparation of Fe by co-precipitation metho...

Embodiment 2

[0078] Embodiment 2 is different from Embodiment 1 except that the following parts are different, and all the other contents are the same:

[0079] In step S23, TiO 2 Particles are mixed with magnetic Fe at a ratio of 10wt% 3 o 4 particle mixing;

[0080] In step S322, the external uniform magnetic field=0.3Ts.

Embodiment 3

[0082] Embodiment three is different from embodiment one except the following parts, and all the other contents are the same:

[0083] In step S23, TiO 2 Particles are mixed with magnetic Fe at a ratio of 20wt% 3 o 4 particle mixing;

[0084] In step S322, the external uniform magnetic field=0.4Ts.

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Abstract

The invention relates to the technical field of coating materials, in particular to a preparation method and application of a Fe3O4 coating with an improved thermal radiation coefficient, and particularly relates to a Fe3O4 coating with a double-layer structure. The surface coating is composed of a magnetic Fe3O4 paint regulated and controlled by an external uniform magnetic field, a rough surfaceis provided for the Fe3O4 coating, and absorption and emission of electromagnetic waves are improved. The inner coating is a Fe3O4-TiO2 doped composite coating, so that the microwave emissivity is enhanced, the upper-layer nano particles are tightly adhered to the surface of the matrix by the inner layer taken as an adhesive, and the structural stability of the coating is improved. A later test shows that the Fe3O4 coating with the novel double-layer structure not only has an excellent high thermal radiation performance, but also has full-wave band radiance of 0.94-0.95; and moreover, the binding strength between the Fe3O4 coating and a CT bulb tube matrix is strong, and the stability of the Fe3O4 coating in a high-temperature environment is enhanced.

Description

technical field [0001] The invention relates to the technical field of coating materials, in particular to a Fe 3 o 4 Coating methods and applications. 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 on the anode target surface (the target surface material is generally tungsten), but X-rays only account for about 1% of the electron energy, while 99% are converted into heat. Since the X-ray tube is a vacuum device, the heat conduction in the tube is quite unsatisfactory. [0003] In order to conduct a large amount of heat generated by the rotating anode X-ray tube to the insulating medium oil layer outside the vacuum tube in a timely manne...

Claims

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Application Information

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IPC IPC(8): C01G49/08C01G23/053C23C14/08C23C14/30H01J35/16C09D163/00C09D7/61
CPCC01G49/08C01G23/053C23C14/30C23C14/085C23C14/083H01J35/16C09D163/00C09D7/61C08K2003/2275C08K2201/01C08K2201/011C08K3/22
Inventor 杨平陈梅侯蕊杨维娟樊龙辉
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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