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Graphene-ceramic composite powder and preparation method thereof

A ceramic composite and graphene technology, applied in the direction of graphene, single-layer graphene, chemical instruments and methods, etc., can solve the problems of long production cycle, increased production cost, human injury, etc., achieve better dispersion effect and reduce production cost cost, effect of avoiding reunion

Active Publication Date: 2017-05-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods have different disadvantages: organic solvents such as N,N-dimethylformamide are toxic and irritating to the eyes, skin and respiratory tract, and long-term contact will inevitably cause harm to the human body; The cycle is long, usually 4-72 hours, and it is difficult to avoid the occurrence of agglomeration; in addition, the price of graphene is expensive, and the direct introduction of graphene will greatly increase the production cost, making it difficult to mass-produce graphene-ceramic composite powder

Method used

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  • Graphene-ceramic composite powder and preparation method thereof
  • Graphene-ceramic composite powder and preparation method thereof

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Embodiment 1

[0036] A preparation method of graphene-ceramic composite powder, comprising the following steps and process conditions thereof:

[0037] (1) Material preparation: according to the percentage of the total mass of GO and zirconia granulated powder, the mass ratio is: GO (made by Hummers method) 0.1wt.%, zirconia granulated powder 99.9wt.%;

[0038] (2) Dispersion of graphene oxide: Add deionized water to the weighed graphene oxide to wet it for 20 minutes, then dilute with deionized water, stir, and sonicate for 30 minutes to obtain a concentration of 0.25 mg / mL Graphene oxide suspension;

[0039] (3) Powder mixing: quickly add zirconia granulated powder to the above graphene oxide suspension, and stir for 10 minutes to obtain a mixture of graphene oxide and zirconia granulated powder;

[0040] (4) Powder drying: Suction filter the mixture of graphene oxide and zirconia granulated powder to obtain a mixed slurry, which is then vacuum-dried at 35°C with a drying pressure of 0 a...

Embodiment 2

[0044] A preparation method of graphene-ceramic composite powder, comprising the following steps and process conditions thereof:

[0045] (1) Raw material preparation: according to the mass percentage of the total mass of GO and zirconia granulated powder, the mass ratio is: GO (made by Hummers method) 0.5wt.%, zirconia granulated powder 99.5t.%;

[0046] (2) Dispersion of graphene oxide: Add deionized water to the weighed graphene oxide to wet it for 10 minutes, then dilute with deionized water, stir, and sonicate for 10 minutes to obtain a concentration of 0.35 mg / mL Graphene oxide suspension;

[0047] (3) Powder mixing: quickly add zirconia granulated powder to the above graphene oxide suspension, and stir for 5 minutes to obtain a mixture of graphene oxide and zirconia granulated powder;

[0048] (4) Powder drying: Suction filter the mixture of graphene oxide and zirconia granulated powder to obtain a mixed slurry, which is then dried in vacuum at 20°C with a drying pressur...

Embodiment 3

[0053] A preparation method of graphene-ceramic composite powder, comprising the following steps and process conditions thereof:

[0054] (1) Material preparation: according to the mass percentage of the total mass of GO and zirconia granulated powder, the mass ratio is: GO (made by Hummers method) 0.01wt.%, zirconia granulated powder 99.99wt.%;

[0055] (2) Dispersion of graphene oxide: Add deionized water to the weighed graphene oxide for wetting for 15 minutes, then dilute with deionized water, stir, and sonicate for 60 minutes to obtain a concentration of 0.05 mg / mL Graphene oxide suspension;

[0056] (3) Powder mixing: quickly add zirconia granulated powder to the above graphene oxide suspension, and stir for 15 minutes to obtain a mixture of graphene oxide and zirconia granulated powder;

[0057] (4) Powder drying: Suction filter the mixture of graphene oxide and zirconia granulated powder above to obtain mixed slurry, vacuum dry at 40°C, dry at a pressure of 1 atm, and...

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Abstract

The invention discloses graphene-ceramic composite powder and a preparation method thereof. Granulated ceramic powder and a graphene oxide are adopted as raw materials for preparation of the composite powder, wherein the content of the granulated ceramic powder is 99.5 to 99.99 weight percent of the total mass of the granulated ceramic powder and the graphene oxide, and the content of the graphene oxide is 0.01 to 0.5 weight percent of the total mass of the granulated ceramic powder and the graphene oxide. The preparation method comprises the following steps: (1) dispersion of the graphene oxide; (2) powder mixing; (3) drying and thermal reduction treatment. According to the preparation method, the physical adsorption performance of the granulated ceramic powder and high hydrophilicity of the graphene oxide are utilized, and the powder with a uniformly distributed graphene oxide is rapidly obtained. The preparation method has a simple process, is convenient to operate, clean and efficient, and can be applied to large-scale production. The graphene oxide in the prepared graphene-ceramic composite powder is uniformly distributed on a ceramic powder matrix, and the configuration has the structural characteristic of a single layer or few layers.

Description

technical field [0001] The invention relates to the technical field of preparation of graphene-ceramic composite powder, in particular to a ceramic composite powder and a preparation method thereof. Background technique [0002] Due to their high strength, high hardness, good wear resistance and high temperature resistance, ceramic materials have been highly valued by people and widely used in various fields. However, the intrinsic brittleness of ceramic materials greatly restricts the further application of ceramic materials. Around how to improve the toughness of ceramic materials, scholars from various countries have studied a variety of toughening mechanisms, including phase transformation toughening, particle dispersion toughening, whisker composite toughening, and continuous fiber toughening. [0003] Graphene is a carbon atom sp 2 Composed of hybrid orbitals, a hexagonal two-dimensional material with honeycomb lattice, has high specific surface area, high strength, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C01B32/198C01B32/194C04B41/85
CPCC01B2204/02C01B2204/04C01P2002/82C01P2004/03C04B35/48C04B41/85
Inventor 刘允中曾招余波黄誉郑启凡李开沥
Owner SOUTH CHINA UNIV OF TECH
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