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A method for treating the surface of a multi-stage step-down collector CU electrode with graphene

A technology of electrode surface and multi-layer graphene, which is applied to the surface treatment of multi-stage step-down collectors of high-efficiency space traveling wave tubes. The multi-stage step-down collector Cu electrode surface is treated with graphene, which can solve the problem of many reagents, Problems such as limited effect and complex processing process, etc., to achieve the effect of large-area uniform growth graphene coating process

Active Publication Date: 2017-02-01
HEFEI UNIV OF TECH
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Problems solved by technology

However, this method uses more reagents in the reaction process, the processing process is relatively complicated, and the requirements for the material of the collector are more stringent, and special manufacturing of the collector material is required. In the actual application process, the effect is limited to a certain extent.

Method used

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  • A method for treating the surface of a multi-stage step-down collector CU electrode with graphene
  • A method for treating the surface of a multi-stage step-down collector CU electrode with graphene
  • A method for treating the surface of a multi-stage step-down collector CU electrode with graphene

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Embodiment Construction

[0031] The invention adopts vapor deposition method to grow graphene material coating on the Cu electrode surface of the multi-stage step-down collector, and performs material modification on the surface of the collector to effectively reduce the secondary electron emission coefficient of the multi-stage step-down collector electrode.

[0032] Process flow of the present invention:

[0033] 1. Pre-treatment of the electrode: Soak in 10% acetic acid aqueous solution for 30 minutes; ultrasonic for acetone for 5 minutes; ultrasonic for ethanol for 5 minutes; ultrasonic for pure water for 5 minutes; dry the electrode;

[0034] 2. Put the electrode into the sputter coater, and coat a layer of metal Ni with a thickness of about 20-50nm;

[0035] 3. Wrap the coated electrode with nickel skin on the outside and place it in the quartz tube of the graphene production equipment;

[0036] Clean the quartz tube 3 times with nitrogen;

[0037] 4. Set CVD furnace heating: C 1 =0°C, T 1 =...

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Abstract

The invention discloses a method for processing the surface of a Cu electrode of a multistage depressed collector through graphene, relates to the technology of vacuum electronics, and provides a novel collector processing technology applicable to a high-efficiency travelling-wave tube. According to the method, a grapheme coating is adopted and can be directly used for processing the oxygen-free copper electrode, secondary electron emission is restrained, the recovery efficiency of the multistage depressed collector is improved, and the overall efficiency of the travelling-wave tube is improved. The method is simple in process, controllable in technology and low in cost, and the processed multistage depressed collector can achieve the same secondary electron emission restraining effect as a collector made of graphite. The processed multistage depressed collector has the advantages of a traditional graphite collector, has higher mechanical performance, electric conduction performance and heat conduction performance, and solves the problems that the structure is loose, strength is low and the graphite collector is prone to generating graphite dust under a long-term bombardment of electron beams, thereby effectively improving the efficiency and reliability of the travelling-wave tube.

Description

technical field [0001] The invention relates to a surface treatment method of a multi-stage step-down collector of a high-efficiency space traveling wave tube, in particular a method for treating the Cu electrode surface of a multi-stage step-down collector with graphene, which belongs to the technical field of microwave vacuum electronics . Background technique [0002] Space traveling wave tube is a type of traveling wave tube widely used in spaceborne transponders of various space communication systems, manned spaceflight and lunar exploration projects, navigation and positioning, space radar detection and electronic countermeasure transmitters, etc. The final microwave power amplifier can amplify weak communication signals to improve communication quality and increase communication distance. [0003] As a key component of a satellite communication system, a space traveling wave tube should have the characteristics of wide frequency band, high gain, high efficiency, high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/02H01J23/027
Inventor 杨军邱龙臻李军英李鹏邓光晟尹治平阮久福
Owner HEFEI UNIV OF TECH
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