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Method for reducing secondary electron emission coefficient on silver-plated surface of aluminum alloy

A secondary electron emission, aluminum alloy technology, applied in sputtering coating, ion implantation coating, vacuum evaporation coating and other directions, can solve the problems of inapplicability, high microwave transmission loss, large structure size, etc., to achieve loss characteristics and transmission performance is small, the secondary electron emission coefficient is reduced, and the effect of reducing the secondary electron emission coefficient

Active Publication Date: 2012-12-12
XIAN INSTITUE OF SPACE RADIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the size of the trap structure on the surface of the microwave component after surface treatment is large, resulting in high microwave transmission loss, which is not suitable for spacecraft with limited energy

Method used

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  • Method for reducing secondary electron emission coefficient on silver-plated surface of aluminum alloy
  • Method for reducing secondary electron emission coefficient on silver-plated surface of aluminum alloy
  • Method for reducing secondary electron emission coefficient on silver-plated surface of aluminum alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1. Clean aluminum alloy microwave components

[0021] Put the machined aluminum alloy microwave components into the acetone solution for 10 minutes of ultrasonic cleaning, and then put them into the ethanol solution for 10 minutes of ultrasonic cleaning.

[0022] 2. Pretreatment of aluminum alloy microwave components

[0023] Put the aluminum alloy microwave parts into 50g / L NaOH solution for 1 minute, and control the temperature of the solution within the range of 40 degrees Celsius.

[0024] 3. Corrosion of aluminum alloy microwave components

[0025] Put the aluminum alloy microwave parts into a solution of ferric chloride with a concentration of 5g / L and hydrochloric acid with a concentration of 10g / L for 3 minutes, and the temperature of the solution is 40 degrees Celsius.

[0026] 4. Sputtering of aluminum alloy microwave components

[0027] Sputtering a layer of copper and then sputtering a layer of silver on the surface of the corroded aluminum alloy microwav...

Embodiment 2

[0029] 1. Clean aluminum alloy microwave components

[0030] Ultrasonic cleaning of aluminum alloy microwave parts in acetone solution for 10 minutes, and then ultrasonic cleaning in ethanol solution for 10 minutes.

[0031] 2. Pretreatment of aluminum alloy microwave components

[0032] Put the aluminum alloy microwave parts into 50g / L NaOH solution for 1 minute, and control the temperature of the solution within the range of 40 degrees Celsius. Apply protective glue on the non-treated working surface, and hang the aluminum alloy microwave components.

[0033] 3. Corrosion of aluminum alloy microwave components

[0034] Put the aluminum alloy microwave component coated with protective glue into a solution of ferric chloride with a concentration of 5g / L and hydrochloric acid with a concentration of 10g / L for 3 minutes, and the temperature of the solution is 40 degrees Celsius. After the corrosion is completed, remove the protective glue on the surface, and then clean the al...

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Abstract

The invention provides a method for reducing a secondary electron emission coefficient on silver-plated surface of aluminum alloy. The method comprises the following steps: (1) carrying out ultrasonic cleaning with an acetone solution on the interior surface of an aluminum alloy microwave component for 10 min and then carrying out ultrasonic cleaning with an ethanol solution for 10 min; (2) cleaning the cleaned interior surface of the aluminum alloy microwave component with a NaOH solution having a concentration of 50 g / L and a temperature of 50 DEG C for 1 min so as to remove an oxide film on the surface of the aluminum alloy; (3) treating the aluminum alloy microwave component with ferric trichloride having a concentration of 5 g / L and a hydrochloric acid mixed solution having a concentration of 10 g / L for 3 min at a temperature of 40 DEG C; (4) sputtering a layer of copper on the interior surface of the aluminum alloy microwave component; and (5) sputtering a layer of silver on the surface of copper. The method provided by the invention can effectively reduce the secondary electron emission coefficient on the silver-plated surface of the aluminum alloy.

Description

technical field [0001] The invention relates to a realization method for reducing the secondary electron emission coefficient on the silver-plated surface of an aluminum alloy, and belongs to the field of microwave technology. Background technique [0002] The micro-discharge effect is the effect of secondary electron emission and multiplication excited between two metal surfaces under vacuum conditions and electrons accelerated by a radio frequency field. Microdischarge effects are prone to occur in areas with strong internal electric fields of high-power microwave components such as multiplexers and filters in spacecraft, resulting in failure of high-power microwave components, and even complete failure of the entire payload. Therefore, the microwave components of the spacecraft must be designed to suppress the micro-discharge effect to ensure the safe and reliable operation of the spacecraft in orbit. [0003] At present, the main method for suppressing micro-discharge o...

Claims

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Application Information

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IPC IPC(8): C23C14/16C23C14/34
Inventor 胡天存崔万照杨晶贺永宁
Owner XIAN INSTITUE OF SPACE RADIO TECH
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