Preparation method of graphene oxide homodisperse reinforced alumina composite material
A composite material, uniform dispersion technology, applied in the direction of graphene, chemical instruments and methods, carbon compounds, etc., can solve the problems of composite material discount, limitation, long period of graphene, etc.
Inactive Publication Date: 2017-09-08
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
However, how to achieve a uniform distribution of GO in the matrix is still a major problem for GO-reinforced ceramic matrix composites.
The method of mechanical ball milling and ultrasonic pulverization can exfoliate graphene with a large degree of agglomeration into few layers and mix it evenly with composite powder, but the graphene structure will be damaged during the ball milling and pulverization process, and the mechanical properties of the prepared composite material Great discount; the period required for mechanical ball milling and ultrasonic pulverization of graphene is long, the efficiency is low, and it is difficult to obtain a single layer of graphene with high transparency, and it is also difficult to disperse evenly in the matrix, which limits graphene as a reinforcement The application of body in ceramics, the problem of dispersion is still a huge obstacle to the research and development of this type of material
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[0022] S1. Use a 1000ml beaker to measure 400ml of concentrated sulfuric acid, put it in an ice bath at 0°C, add 5g of graphite and then 5g of potassium nitrate under magnetic stirring, and slowly add 40g of potassium permanganate within 40min under magnetic stirring, and transfer to the oil bath After keeping at 38°C for 4.5h, turn to ice bath at 0°C, slowly add 400ml of deionized water, turn to oil bath at 80°C for 30min, add 40ml of hydrogen peroxide (H 2 o 2 , 30%), then add 100-200ml deionized water to obtain a mixed solution;
[0023] S2, after the mixed solution is statically precipitated, pour off the supernatant, add distilled water to make up to 1000ml, add 50ml of hydrochloric acid (HCl, 36%) under stirring with a glass rod; statically precipitate, remove the supernatant, add distilled water to make up to After 1000ml, add 50ml of hydrochloric acid under glass rod stirring, static precipitation, remove the supernatant, until there is no supernatant, pour the precip...
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The invention discloses a preparation method of a graphene oxide (GO) homodisperse reinforced alumina composite material. The method includes the steps of: preparing a graphene oxide hydrosol; preparing a TiO2-CuO sintering additive; preparing an AlOOH sol; adding the AlOOH sol into the TiO2-CuO sintering additive according to certain weight percentage, then dispersing the graphene oxide hydrosol in the AlOOH sol according to a GO / alpha-Al2O3 weight ratio of 0.2%-0.6%, and conducting heating till water evaporation to obtain gel, and carrying out molding, drying, calcination and hot pressing sintering, thus obtaining the graphene oxide homodisperse reinforced alumina composite material. The method provided by the invention realizes homodisperse of graphene oxide in an alpha-Al2O3 matrix, and achieves an excellent strengthening and toughening effect.
Description
technical field [0001] The invention relates to the field of composite material preparation, in particular to a method for preparing a graphene oxide uniformly dispersed reinforced alumina composite material. Background technique [0002] αα-Al 2 o 3 Based advanced structure ceramic materials have outstanding advantages such as high mechanical strength, high insulation resistance, high hardness, corrosion resistance, wear resistance, high temperature resistance, etc., and are rich in resources and low in price. They are currently the most widely used and the largest production and sales of oxide ceramics New materials can be used in aerospace, national defense and other fields. However, alumina also has its own shortcomings, such as high brittleness and poor thermal shock resistance, but its low toughness limits its development. Toughening with graphene oxide can improve the mechanical properties. Graphene oxide (Graphene Oxide, GO) is an intermediate product of graphene ...
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Login to View More IPC IPC(8): C04B35/10C04B35/80C04B35/624C01B32/198
CPCC01B2204/32C01P2002/72C04B35/10C04B35/624C04B2235/425
Inventor 贾建刚刘第强高昌琦季根顺郭铁明
Owner LANZHOU UNIVERSITY OF TECHNOLOGY