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Preparation method for porous Au coating inhibiting microdischarge effect

A micro-discharge effect and coating technology, applied in coating, metal material coating process, liquid chemical plating, etc., can solve the problem of damaged surface performance, poor environmental stability of trap structure silver, complex ion beam etching process, etc. problem, to achieve the effect of good environmental stability

Inactive Publication Date: 2017-06-13
SHAANXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ion beam etching process is complicated, and a suitable mask needs to be selected, and high energy may damage the surface properties.
In addition, the environmental stability of trap structure silver in the prior art is poor

Method used

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  • Preparation method for porous Au coating inhibiting microdischarge effect
  • Preparation method for porous Au coating inhibiting microdischarge effect
  • Preparation method for porous Au coating inhibiting microdischarge effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Use 50mL HF / HNO 3 / H 2 The O etching system etched the silver-coated aluminum alloy with a length of 20 mm, a width of 12 mm, and a height of 1 mm. The etching temperature was 25 °C and the etching time was 2 min. The silver-coated aluminum alloy was cleaned with 50 mL of deionized water and then Sonicate for 3 minutes, and dry in a 50°C oven for 30 minutes. Then, 12g of Fe(NO 3 ) 3 The sample was etched with an aqueous solution, the etching temperature was 45°C, and the etching time was 35s. The silver-plated aluminum alloy was cleaned with 50mL deionized water and ultrasonicated for 3 minutes, and dried in an oven at 50°C for 30 minutes. Among them, HF / HNO 3 / H 2 The O etching system is prepared by the following method: mix hydrofluoric acid, nitric acid and water uniformly to obtain HF / HNO 3 / H 2 O etching system, wherein the volume ratio of hydrofluoric acid, nitric acid and water in every 50mL is 2:12.5:35.5.

[0035] (2) Immerse the silver-plated alumi...

Embodiment 2

[0038] (1) Use 50mL HF / HNO 3 / H 2The O etching system etched the silver-coated aluminum alloy with a length of 20 mm, a width of 12 mm, and a height of 1 mm. The etching temperature was 30 °C and the etching time was 4 min. The silver-coated aluminum alloy was cleaned with 100 mL of deionized water and removed. Sonicate for 3 minutes, and dry in an oven at 70°C for 40 minutes. Then, 12g of Fe(NO 3 ) 3 The sample was etched with an aqueous solution, the etching temperature was 55°C, and the etching time was 45s. The silver-plated aluminum alloy was cleaned with 100mL deionized water and ultrasonicated for 3 minutes, and dried in an oven at 70°C for 40 minutes. Among them, HF / HNO 3 / H 2 The O etching system is prepared by the following method: mix hydrofluoric acid, nitric acid and water uniformly to obtain HF / HNO 3 / H 2 O etching system, wherein the volume ratio of hydrofluoric acid, nitric acid and water in every 50mL is 3.5:12.5:34.

[0039] (2) Immerse the silver-pla...

Embodiment 3

[0042] (1) Use 50mL HF / HNO 3 / H 2 The O etching system etches the silver-coated aluminum alloy with a length of 20 mm, a width of 12 mm, and a height of 1 mm. The etching temperature is 28 °C, and the etching time is 3 min. The silver-coated aluminum alloy is cleaned with 100 mL of deionized water and removed Sonicate for 3 minutes, and dry in an oven at 60°C for 40 minutes. Then, 12g of Fe(NO 3 ) 3 The sample was etched with an aqueous solution, the etching temperature was 50°C, and the etching time was 40s. The silver-plated aluminum alloy was cleaned with 100mL deionized water, ultrasonicated for 3min, and dried in an oven at 60°C for 40min. Among them, HF / HNO 3 / H 2 The O etching system is prepared by the following method: mix hydrofluoric acid, nitric acid and water uniformly to obtain HF / HNO 3 / H 2 O etching system, wherein the volume ratio of hydrofluoric acid, nitric acid and water in every 50mL is 3:12.5:34.5.

[0043] (2) Immerse the silver-plated aluminum al...

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Abstract

The invention discloses a preparation method for a porous Au coating inhibiting the microdischarge effect. Firstly, a porous structure is constructed on the surface of silver-coated aluminum alloy; secondly, a TiO2 film is deposited on the surface of the porous structure in a profile-followed mode through a sol-gel method; and finally, an Au film is prepared on the surface of the TiO2 through a chemical plating method, so that the porous Au coating inhibiting the microdischarge effect is formed on the surface of the silver-coated aluminum alloy, the porosity and the number of pores of the surface of the silver-coated aluminum alloy can be greatly increased, and thus the microdischarge inhibiting characteristic and environment stability of the silver-coated aluminum alloy are improved.

Description

technical field [0001] The invention relates to a method for preparing a porous Au coating that suppresses micro-discharge effects, in particular to constructing a porous Au coating on the surface of a silver-plated aluminum alloy to improve the micro-discharge suppression characteristics and environmental stability of the surface of the silver-plated aluminum alloy. Background technique [0002] The micro-discharge effect is a vacuum resonance discharge phenomenon that occurs between two metal surfaces or on the surface of a single medium. The secondary electrons are excited by the incident surface of the initial electrons, causing the continuous accumulation of secondary electrons, resulting in an electronic avalanche leading to discharge. . The generation of micro-discharge effect will cause detuning of resonant equipment, resulting in the misadjustment of the transmitted microwave signal, generating narrow-band noise close to the carrier frequency, and even causing the p...

Claims

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Application Information

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IPC IPC(8): C23C18/04C23C18/12C23C18/44C23F1/20C23F1/30C23F1/14
CPCC23C18/04C23C18/1216C23C18/1241C23C18/1254C23C18/1648C23C18/165C23C18/44C23F1/14C23F1/20C23F1/30
Inventor 鲍艳吴朵朵马建中崔万照胡天存杨晶
Owner SHAANXI UNIV OF SCI & TECH
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