A kind of core-shell powder ultra-black material and preparation method thereof

An ultra-black material, core-shell technology, applied in chemical instruments and methods, metal material coating technology, other chemical processes, etc., can solve the problems of reducing the surface energy of ultra-black powder and low light absorption performance, etc.

Active Publication Date: 2020-12-11
HARBIN INST OF TECH
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  • Abstract
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Problems solved by technology

[0003] The invention controls the deposition of ultra-thin oxide film on the surface of ultra-black powder through atomic layer deposition technology, which can form a stable chemical bond with the surface of carbon black, improve the dispersibility and extinction performance of carbon nanomaterials, and reduce the The surface energy of ultra-black powder can effectively solve the problem of low light absorption performance caused by powder agglomeration

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  • A kind of core-shell powder ultra-black material and preparation method thereof

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Experimental program
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Effect test

specific Embodiment approach 1

[0027] Specific embodiment one: the specific steps of the preparation method of a core-shell type powder ultra-black material in this embodiment are as follows:

[0028] 1. ①Place carbon black powder with a particle size of 100nm in the reaction chamber, and under the conditions of temperature 150°C and pressure 0.15torr, pass diethyl zinc in the form of pulses for reaction, and the pulse time is 0.02s , and then feed nitrogen with a mass purity of 99.999% to purge the reaction residue, and the purge time is 40s; Purging the reaction residue with nitrogen with a mass purity of 99.999%, the purging time is 40s, step ① to step ② is a cycle;

[0029] 2. Repeat the cycle of step 1 100 times to complete the atomic layer deposition reaction, and obtain a core-shell powder ultra-black material with an oxide film deposited on the surface of the carbon black powder.

[0030] The thickness of the zinc oxide thin film in the core-shell powder ultra-black material obtained in this embodi...

specific Embodiment approach 2

[0031] Specific embodiment two: the specific steps of the preparation method of a core-shell type powder ultra-black material in this embodiment are as follows:

[0032] 1. ①Place carbon black powder with a particle size of 100nm in the reaction chamber, and under the conditions of temperature 150°C and pressure 0.15torr, pass diethyl zinc in the form of pulses for reaction, and the pulse time is 0.02s , and then feed nitrogen with a mass purity of 99.999% to purge the reaction residue, and the purge time is 40s; Purging the reaction residue with nitrogen with a mass purity of 99.999%, the purging time is 40s, step ① to step ② is a cycle;

[0033] 2. Repeat the cycle of step 1 for 150 times to complete the atomic layer deposition reaction, and obtain a core-shell powder ultra-black material with an oxide film deposited on the surface of the carbon black powder.

[0034] The thickness of the zinc oxide thin film in the core-shell powder ultra-black material obtained in this em...

specific Embodiment approach 3

[0036] Specific embodiment three: the specific steps of the preparation method of a core-shell type powder ultra-black material in this embodiment are as follows:

[0037] 1. ① Put the carbon black powder with a particle size of 100nm in the reaction chamber, and under the conditions of temperature 150°C and pressure 0.15torr, pass trimethylaluminum in the form of pulses for reaction, and the pulse time is 0.02s , and then feed nitrogen with a mass purity of 99.999% to purge the reaction residue, and the purge time is 40s; Purging the reaction residue with nitrogen with a mass purity of 99.999%, the purging time is 40s, step ① to step ② is a cycle;

[0038] 2. Repeat the cycle of step 1 100 times to complete the atomic layer deposition reaction, and obtain a core-shell powder ultra-black material with an oxide film deposited on the surface of the carbon black powder.

[0039] The thickness of the aluminum oxide thin film in the core-shell powder ultra-black material obtained ...

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Abstract

The invention discloses a core-shell-type ultra black powder material and a preparation method thereof, belongs to the technical field of ultra black materials, and solves the problems of easy agglomeration and poor controllability of the powder in a traditional ultra black powder material. An ultra thin oxide film is deposited on the surface of carbon black powder through an atomic layer deposition technology of a product to obtain a core-shell-type ultra black powder material, carbon black is used as a matrix material and has higher solar absorption rate, excellent coloring capability and high spatial stability, stray light generated by extreme space environment can be effectively eliminated, and the dispersion and extinction performance of a carbon nano material can be improved by forming stable chemical bond between the oxide film through atomic layer deposition and the surface of the carbon black. By means of the preparation method, the ultra black material with high shape preserving performance and uniform core-shell structures has high dispersion and excellent light absorption performance, and has wide application prospects in the fields such as astronomical photography, military reconnaissance, space observation and light heat conversion.

Description

technical field [0001] The invention belongs to the technical field of ultra-black materials, and in particular relates to a core-shell powder ultra-black material and a preparation method thereof. Background technique [0002] The performance of optical systems such as optical devices and sensors is affected due to unnecessary stray light reflections at key interfaces, which will reduce the signal-to-noise ratio, sensitivity and reliability of optical devices. Ultra-black powder is usually used as a light-absorbing material, which can absorb and eliminate most of the stray light within a certain range. At present, with the continuous improvement of the requirements for the stability and sensitivity of the optical system, the light absorption performance of the ultra-black powder can no longer meet the requirements; It solves the problem that it is difficult to further improve the light absorption capacity of ultra-black powder materials. Therefore, it is very important to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/40C23C16/455C09K3/00
CPCC09K3/00C23C16/40C23C16/45555
Inventor 吴晓宏卢松涛秦伟李杨熊启阳
Owner HARBIN INST OF TECH
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