Preparation method of aluminum oxide anti-ion feedback film of micro-channel plate

An anti-ion feedback film and aluminum oxide technology, which is applied in the manufacture of secondary emitter electrodes, electron multiplier tubes, and light-emitting cathodes, can solve the problems of carbon pollution in microchannel plates, long time-consuming processes, etc. , to achieve the effects of avoiding pollution, avoiding high equipment investment costs and low preparation costs

Active Publication Date: 2020-09-01
LUDONG UNIVERSITY
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Problems solved by technology

The use of organic support film will bring carbon pollution to the microchannel plate, and vacuum coating equipment such as ion sputtering coating and magnetron sputtering coating have high cost and long process time
The preparation method of the microchannel plate with anti-ion feedback film combines the preparation of aluminum oxide anti-ion feedback film with the preparation of mic

Method used

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  • Preparation method of aluminum oxide anti-ion feedback film of micro-channel plate
  • Preparation method of aluminum oxide anti-ion feedback film of micro-channel plate
  • Preparation method of aluminum oxide anti-ion feedback film of micro-channel plate

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Experimental program
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Effect test

Embodiment 1

[0028] (1) In an environment with an ambient temperature of 20°C and a nitrogen atmosphere, use Ga 62.5 In 21.5 sn 16.0 Liquid alloy as a solvent, weighed 390 grams of Ga 62.5 In 21.5 sn 16.0 The liquid alloy is poured into a 100 ml large-mouth conical glass flask, and 4 grams of spherical aluminum powder with a diameter of 25 microns and a purity of 99.95% is added to Ga 62.5 In 21.5 sn 16.0 Formation of high-purity aluminum powder and Ga in liquid alloy 62.5 In 21.5 sn 16.0 Liquid alloy mixture, for high-purity aluminum powder and Ga 62.5 In 21.5 sn 16.0 The liquid alloy mixture was fully stirred for 12 minutes to obtain a gallium-based liquid alloy containing 1 wt% of aluminum.

[0029] (2) In an environment with an ambient temperature of 20°C and a nitrogen atmosphere, pour an appropriate amount of the gallium-based liquid alloy containing 1wt% aluminum obtained in step (1) into a clean glass petri dish with a diameter of 60 mm, and wait until it contains 1wt% ...

Embodiment 2

[0033] (1) Under the environment of ambient temperature 30℃ and nitrogen atmosphere, use Ga 75.5 In 24.5 Liquid alloy as a solvent, weighed 381 grams of Ga 75.5 In 24.5 The liquid alloy is poured into a 100 ml large-mouth conical glass flask, and 8 grams of spherical aluminum powder with a diameter of 25 microns and a purity of 99.95% is added to Ga 75.5 In 24.5 Formation of high-purity aluminum powder and Ga in liquid alloy 75.5 In 24.5 Liquid alloy mixture, for high-purity aluminum powder and Ga 75.5 In 24.5 The liquid alloy mixture was fully stirred for 15 minutes to obtain a gallium-based liquid alloy containing 2 wt% of aluminum.

[0034] (2) In an environment with an ambient temperature of 30°C and a nitrogen atmosphere, pour an appropriate amount of the gallium-based liquid alloy containing 2wt% aluminum obtained in step (1) into a clean glass petri dish with a diameter of 60 mm, and wait until it contains 2wt% aluminum After the shape of the gallium-based liqui...

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Abstract

The invention discloses a preparation method of an aluminum oxide anti-ion feedback film of a micro-channel plate. According to the technical scheme, a room-temperature gallium-based liquid alloy is used as a solvent; high-purity aluminum powder is added into the room-temperature gallium-based liquid alloy to form a room-temperature aluminum-containing gallium-based liquid alloy; the room-temperature aluminum-containing gallium-based liquid alloy is exposed in an air environment to form a sub-nano aluminum oxide film on a liquid alloy-air interface, the input surface of the micro-channel plateis in contact with the aluminum oxide film, and the high-quality sub-nano aluminum oxide anti-ion feedback film is prepared on the micro-channel plate. Ion feedback of the micro-channel plate can beprevented, the service life of a photoelectric imaging device is prolonged, and the imaging background is improved. The method has the advantages of being simple, low in cost, free of thin film deposition equipment and the like.

Description

technical field [0001] The invention relates to a preparation method of an aluminum oxide anti-ion feedback film of a microchannel plate, belonging to the technical field of electric vacuum imaging devices. Background technique [0002] The low-light image intensifier is the core device of the low-light night vision device, which is mainly composed of a photocathode, a micro-channel plate (MCP for short) and a fluorescent screen. The photocathode receives external weak light information and converts the light information into escaping photoelectrons; the microchannel plate performs electron multiplication on the escaping photoelectrons from the photocathode to form an enhancement of the photoelectron signal; the fluorescent screen receives the photoelectrons emitted by the microchannel plate to form an optical image . As a key component of the low-light image intensifier, the micro-channel plate plays a vital role in the signal enhancement of the low-light image intensifier...

Claims

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Application Information

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IPC IPC(8): H01J9/12H01J43/24B82Y40/00
CPCH01J43/246H01J9/125B82Y40/00
Inventor 赵银女闫金良闫慧龙
Owner LUDONG UNIVERSITY
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