Preparation method for graphene-ceramic composite material

A ceramic composite material and ceramic composite technology, applied in the field of graphene composite materials, can solve the problems of unfavorable mixing and dispersion of ceramic powder, increase of process cycle and cost, environmental hazards, etc., and achieve the effect of low cost, optimized performance and short cycle

Active Publication Date: 2018-05-18
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to remove the impurity phases such as magnesium oxide generated by the reaction, this method usually requires repeated pickling of the product, which increases the process cycle and cost, and also brings potential environmental hazards.
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  • Preparation method for graphene-ceramic composite material
  • Preparation method for graphene-ceramic composite material
  • Preparation method for graphene-ceramic composite material

Examples

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Example Embodiment

[0037] Example 1

[0038] A preparation of graphene ceramic composite material includes the following steps:

[0039] Step 1: Take 10g of magnesium powder with an average particle size of 100μm and 90g of Al with an average particle size of 200nm 2 O 3 The powder is uniformly mixed by ball milling for 1 hour;

[0040] Step 2: Place the uniformly mixed raw material powder in the graphite mold of the combustion reaction device. In the carbon dioxide gas of 0.5MPa, a 50A tungsten coil is used to induce a self-propagating combustion reaction between the magnesium powder in the raw material and carbon dioxide, and the device is cooled. Then a gray-black graphene ceramic composite powder was obtained.

[0041] Step 3: Using spark plasma sintering, the graphene ceramic composite powder is sintered at a pressure of 60 MPa at 1500° C. for 30 minutes in a vacuum to obtain a graphene ceramic composite with a diameter of 30 mm and a thickness of 3 mm.

[0042] figure 1 In (a) is the X-ray diffract...

Example Embodiment

[0047] Example 2

[0048] A preparation of graphene ceramic composite material includes the following steps:

[0049] Step 1: Take 9g of magnesium powder with an average particle size of 45μm, 9.69g of MgO powder with an average particle size of 100nm and 62.31g of Al with an average particle size of 200nm 2 O 3 The powder is uniformly mixed by ball milling for 1 hour;

[0050] Step 2: Place the uniformly mixed raw material powder in the graphite mold of the combustion reaction device. In 1.0MPa carbon dioxide gas, a 40A tungsten coil is used to induce a self-propagating combustion reaction between magnesium powder and carbon dioxide in the raw material, and the device is cooled. Then a gray-black graphene ceramic composite powder was obtained.

[0051] Step 3: Using spark plasma sintering, the graphene ceramic composite powder is sintered under a pressure of 60 MPa at 1400° C. for 20 minutes in a vacuum to obtain a graphene ceramic composite with a diameter of 10 mm and a thickness o...

Example Embodiment

[0056] Example 3

[0057] A preparation of graphene ceramic composite material includes the following steps:

[0058] Step 1: Take 10g of magnesium powder with an average particle size of 25μm and 68g of ZrO with an average particle size of 500nm 2 Powder and 2g Y with an average particle size of 50nm 2 O 3 The powder is uniformly mixed by ball milling for 1 hour;

[0059] Step 2: Place the uniformly mixed raw material powder in the graphite mold of the combustion reaction device. In the carbon dioxide gas of 2.0MPa, a 30A tungsten coil is used to induce a self-propagating combustion reaction between the magnesium powder in the raw material and carbon dioxide, and the device is cooled. Then a gray-black graphene ceramic composite powder was obtained.

[0060] Step 3: Using pressureless sintering, the graphene ceramic composite powder is cold isostatically pressed at a pressure of 200 MPa, and sintered at 1500° C. under vacuum for 4 hours to obtain a graphene ceramic composite with a d...

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Abstract

The invention discloses a preparation method for a graphene-ceramic composite material, which comprises the following steps: magnesium powder and ceramic powder are uniformly mixed, so that mixed powder is obtained, the mixed powder is burned in carbon dioxide gas to react, so that graphene-ceramic composite powder is obtained, and the graphene-ceramic composite powder is shaped and sintered, so that the graphene-ceramic composite material is obtained. The preparation method disclosed by the invention has the characteristics of simple process, short preparation period, low cost and the like, and the prepared graphene-ceramic composite material has the characteristics of uniform component structure, excellent properties and the like. The preparation method utilizes the characteristic of in-situ deposition combination in the gas-solid reaction between magnesium and carbon dioxide to realize the uniform mixing and dispersion of graphene and the ceramic powder on a microscale.

Description

technical field [0001] The invention relates to the technical field of graphene composite materials. More specifically, it relates to a method for preparing a graphene ceramic composite material. Background technique [0002] Graphene has excellent properties such as high modulus, high strength, high electron mobility and high thermal conductivity. Combining graphene with ceramic materials can significantly improve the mechanical, thermal, electrical and optical properties of ceramic materials, and has broad application prospects in many fields. [0003] At present, there are two main methods for preparing graphene ceramic composite materials. One is to mix graphene prepared by methods such as graphite oxide reduction, chemical vapor deposition, epitaxial growth or organic synthesis with ceramic powder, and then sinter it to prepare it. It is prepared by high-energy ball milling of expanded graphite and ceramic powder, exfoliation in situ to obtain graphene ceramic composi...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622C04B35/626C04B35/48C04B35/584C04B35/565C04B35/58C04B35/14
CPCC04B35/10C04B35/14C04B35/48C04B35/565C04B35/58078C04B35/584C04B35/622C04B35/6265C04B2235/3206C04B2235/3225C04B2235/77C04B2235/96C04B2235/9646
Inventor 贺刚鲁楠李宏华李江涛
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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