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Preparation method of high-tolerance nanophase graphene composite ceramic

A graphene composite and nanophase technology, applied in the field of two-dimensional material composite, can solve the problems of limited functional materials, device performance degradation, easy to be physically damaged, etc., and achieve strong chemical bonding force, large structural strain, and high tolerance Effect

Inactive Publication Date: 2019-01-08
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, three-dimensional graphene and graphene films are developed and widely used in the field of composite materials. However, due to the over-exposed surface, these two types of graphene structures are easily damaged physically or even chemically oxidized, which leads to a great decrease in device performance. decline
This poor durability will greatly limit the practical application of functional materials

Method used

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  • Preparation method of high-tolerance nanophase graphene composite ceramic
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  • Preparation method of high-tolerance nanophase graphene composite ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1, preparation nano-phase graphene composite Al2O3 ceramics

[0040] Wash aluminum oxide nanocrystals with a purity of 99.99% and a crystal particle size of 30-50 nm three times with deionized water and then dry them. Take 0.8 g of the dried aluminum oxide and place it in pure water for ultrasonication for 20 minutes. , after cooling, ultrasonication was repeated 15 times to prepare a suspension of aluminum oxide.

[0041] Put the metal nickel powder with a purity of 99%, a crystal particle size of 50nm, and a mass of 0.2g into ethanol for ultrasonication and stirring for 20 minutes, then ultrasonication after cooling, and repeat 6 times to prepare a metallic nickel dispersion; Mixed with aluminum oxide suspension.

[0042] Drying is carried out by heating while stirring. The mixed liquid was placed on the hot stage, the temperature of the hot stage was 130° C., and the two kinds of nanocrystals were fully mixed by heating while stirring. A mixed nanocryst...

Embodiment 2

[0051] Embodiment 2, preparation nano-phase graphene composite silicon nitride ceramics

[0052] Wash silicon nitride nanocrystals with a purity of 99.99% and a crystal particle size of 30-50 nm three times with deionized water and then dry them. Take 0.8 g of the dried silicon nitride and place it in pure water for ultrasonication. The ultrasonication time is 20 minutes and cooled. Then ultrasonication was repeated 15 times to prepare a silicon nitride suspension.

[0053] Put the metal nickel powder with a purity of 99%, a crystal particle size of 50nm, and a mass of 0.2g into ethanol for ultrasonication and stirring for 20 minutes, then ultrasonication after cooling, and repeat 6 times to prepare a metallic nickel dispersion; Mixing with silicon nitride suspension.

[0054] Drying is carried out by heating while stirring. The mixed liquid was placed on the hot stage, the temperature of the hot stage was 130° C., and the two kinds of nanocrystals were fully mixed by heatin...

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Abstract

The invention relates to a preparation method of a high-tolerance nanophase graphene composite ceramic, and belongs to the field of composition of two-dimensional materials. A metal mixed ceramic nanopowder substrate is prepared first, then nanophase graphene is catalyzed to grow on the surface of the substrate through chemical vapor deposition so as to finish the preparation of the nanophase graphene; an obtained nanophase graphene composite ceramic powder is rapidly sintered by discharge plasma so as to finish the preparation of the nanophase graphene composite ceramic. The graphene ceramicmaterial prepared by the invention is excellent in electric conduction, heat conduction and chemical stability.

Description

technical field [0001] The invention belongs to the field of two-dimensional material compounding, and relates to a preparation method of high tolerance nano-phase graphene composite ceramics. Background technique [0002] Graphene has many excellent properties, including very high carrier mobility, high light transmittance, and its thermal and mechanical properties are also excellent. It is considered to be a strong competitor for building a new generation of high-performance devices. At present, three-dimensional graphene and graphene films are developed and widely used in the field of composite materials. However, due to the over-exposed surface, these two types of graphene structures are easily damaged physically or even chemically oxidized, which leads to a great decrease in device performance. decline. Such poor durability will greatly limit the practical application of functional materials. In this case, in order to cope with these common external environments, such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/584C04B35/622C01B32/186
CPCC04B35/10C04B35/584C04B35/622C04B2235/405C04B2235/425C01B32/186
Inventor 付磊刘津欣笪煜民
Owner WUHAN UNIV
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