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A method for preparing flake graphene-aluminum mixed powder

A flake graphite and mixed powder technology is applied in the field of preparing graphene-aluminum mixed powder, which can solve the problems of high defect content of graphene and easy oxidation of flake aluminum powder, so as to shorten the ball milling time and alleviate the problem of oxidation heat release. , The effect of improving the efficiency of ball milling

Active Publication Date: 2020-05-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of high defect content of graphene, agglomeration of aluminum powder particles and easy oxidation of the prepared flake aluminum powder in the process of preparing flake aluminum powder by ball milling, the present invention proposes a preparation method using silicone oil as a grinding aid and repair agent. Method for flake graphene-aluminum mixed powder

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  • A method for preparing flake graphene-aluminum mixed powder
  • A method for preparing flake graphene-aluminum mixed powder
  • A method for preparing flake graphene-aluminum mixed powder

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specific Embodiment approach 1

[0032] Specific embodiment one: the present embodiment uses silicone oil as grinding aid and repairing agent to prepare the method for flaky graphene-aluminum mixed powder to carry out according to the following steps:

[0033] 1. Weighing: Weigh 0.5% to 4% graphene, 0.5% to 10% silicone oil and the rest of aluminum powder as raw materials according to the mass fraction;

[0034] 2. Raw material pre-mixing: put the raw material weighed in step 1 into the ball mill tank, start the ball mill for pre-mixing;

[0035] 3. Ball milling: Introduce protective gas into the ball milling tank in step 2, and ball mill at a speed of 100-400rpm for 0.2-10 hours, and pause for 10-30 minutes after every 5-10 minutes of ball milling during the ball milling process to obtain mixed powder;

[0036] 4. Insulation treatment of flake graphene-aluminum mixed powder:

[0037] Put the mixed powder obtained in step 3 into a vacuum or atmosphere constant temperature furnace, keep it at 400-460°C for 1-...

specific Embodiment approach 2

[0046] Embodiment 2: This embodiment differs from Embodiment 1 in that the silicone oil described in Step 1 is an analytical reagent. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0047] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the silicone oil in Step 1 is polydimethyl silicone oil, polydiethyl silicone oil or polyphenyl silicone oil. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a method for preparing flake graphene-aluminum mixed powder with silicone oil serving as a grinding aid and a repairing agent and relates to the method for preparing the graphene-aluminum mixed powder. The problems that in the process that the flake aluminum powder is prepared through a ball-milling method, the defect content of graphene is high, agglomeration of aluminum powder particles occurs, and the prepared flake aluminum powder is prone to be oxidized are solved. The preparation method comprises the steps that the graphene, the silicone oil and the aluminum powderare weighed to serve as raw materials; the raw materials are subjected to ball-milling again after being subjected to ball-milling and premixing, an obtained powder body is subjected to heat preservation in a vacuum or atmospheric constant-temperature furnace, finally sieving and separating are performed, and the graphene-aluminum mixed powder is obtained. The silicone oil is selected as the grinding aid, the flake aluminum powder is separated from the surface of a ball-milling medium beneficially, agglomeration is avoided, cold welding and oxidation of the aluminum powder are avoided, ball-milling time can be remarkably shortened, ball-milling efficiency is improved, dispersing of the graphene in the aluminum powder is facilitated, the silicone oil is discomposed to generate free Si atoms to repair and remedy the defect structure, the stability of the graphene is improved, and good Al-Si-C interface combination is formed. The method is suitable for preparing the flake graphene-aluminum mixed powder.

Description

technical field [0001] The invention relates to a method for preparing graphene-aluminum mixed powder. Background technique [0002] Powder is an important raw material for production, and powder manufacturing technology plays an important role in the material preparation process. Especially in the production process of aluminum matrix composites, uniform dispersion of raw aluminum powder and reinforcement is an important process. When the reinforcement is graphene, because graphene is easy to agglomerate, it is difficult to achieve uniform dispersion of graphene by conventional methods; the complete delocalized π bond structure of graphene will be destroyed in the process of oxidation and mechanical exfoliation. sp 2 to sp 3 Transformation will increase the defect content of graphene, and the graphene at the defect will break preferentially, which is not conducive to the enhancement effect of graphene; the wettability of graphene and aluminum powder is poor, and graphene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/04C22C1/10C22C21/00
CPCB22F1/0003B22F9/04B22F2009/043C22C1/1005C22C1/1084C22C21/00
Inventor 鞠渤宇武高辉杨文澍姜龙涛张强陈国钦康鹏超修子扬乔菁
Owner HARBIN INST OF TECH