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Graphene ceramic composite material prepared based on 3D printing and preparation method thereof

A ceramic composite material and 3D printing technology, applied in the field of ceramic composite materials, can solve the problems of toughness, poor electrical and thermal conductivity, and achieve the effect of fast sintering, tight bonding and overall heating.

Pending Publication Date: 2020-12-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of poor toughness and poor electrical and thermal conductivity of ceramic materials at present, improve the mechanical properties of ceramic materials, expand the application fields of ceramic materials except aviation and aerospace, and invent a kind of graphene ceramic composite material, and Its preparation method combines 3D printing and microwave sintering technology, the preparation process is convenient and fast, the sintering speed is fast and the sintering is dense

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare SiC powder with a content of 25wt.%, graphene with a content of 3wt.%, and the rest as Al 2 o 3 Powdered 3D Printed Graphene Ceramic Composites:

[0030] Select SiC powder with a particle size of 10um, a purity of 99.5%, and a content of 25wt.%, graphene with a purity of 99.8%, and a content of 3wt.%. The substrate is Al with a particle size of 1um and a purity of 99.8%. 2 o 3 powder, mixed with a certain amount of absolute ethanol, ultrasonically dispersed for 12 hours, and then ball milled. The ball milling medium was zirconia balls, the ball-to-material ratio was 4:1, the ball milled for 8 hours, and the speed was 300r / min. The slurry after ball milling was at 60 Dry in a drying oven at ℃ for 4 hours. After drying, grind through an 80-mesh sieve, then add the dispersant sodium carboxymethyl cellulose and the binder polyvinyl alcohol, dissolve in deionized water at a temperature of 55-85 °C, and stir well Make water-based slurry; then put the water-based sl...

Embodiment 2

[0032] Prepare SiC powder with a content of 30wt.%, graphene with a content of 3wt.%, and the rest as Al 2 o 3 Powdered 3D Printed Graphene Ceramic Composites:

[0033] Select SiC powder with a particle size of 10um, a purity of 99.5%, and a content of 30wt.%, graphene with a purity of 99.8%, and a content of 3wt.%. The substrate is Al with a particle size of 1um and a purity of 99.8%. 2 o 3 powder, mixed with a certain amount of absolute ethanol, ultrasonically dispersed for 12 hours, and then ball milled. The ball milling medium was zirconia balls, the ball-to-material ratio was 4:1, the ball milled for 8 hours, and the speed was 300r / min. The slurry after ball milling was at 60 Dry in a drying oven at ℃ for 4 hours. After drying, grind through an 80-mesh sieve, then add the dispersant sodium carboxymethyl cellulose and the binder polyvinyl alcohol, dissolve in deionized water at a temperature of 55-85 °C, and stir well Make water-based slurry; then put the water-based slur...

Embodiment 3

[0035] Prepare SiC powder with a content of 30wt.%, graphene with a content of 5wt.%, and the rest as Al 2 o 3 Powdered 3D Printed Graphene Ceramic Composites:

[0036] Select SiC powder with a particle size of 10um, a purity of 99.5%, and a content of 30wt.%, graphene with a purity of 99.8%, and a content of 5wt.%. The substrate is Al with a particle size of 1um and a purity of 99.8%. 2 o 3 powder, mixed with a certain amount of absolute ethanol, ultrasonically dispersed for 12 hours, and then ball milled. The ball milling medium was zirconia balls, the ball-to-material ratio was 4:1, the ball milled for 8 hours, and the speed was 300r / min. The slurry after ball milling was at 60 Dry in a drying oven at ℃ for 4 hours. After drying, grind through an 80-mesh sieve, then add the dispersant sodium carboxymethyl cellulose and the binder polyvinyl alcohol, dissolve in deionized water at a temperature of 55-85 °C, and stir well Make water-based slurry; then put the water-based sl...

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Abstract

The invention provides a graphene ceramic composite material prepared based on 3D printing and a preparation method thereof, and belongs to the field of preparation of ceramic composite materials. Thegraphene ceramic composite material is prepared from three raw materials, namely Al2O3, SiC particles and graphene. The preparation process mainly comprises the steps of ball-milling mixing, slurry preparation, 3D printing, drying and microwave sintering. The preparation method has the main advantages that a method combining a 3D printing technology and microwave pressure sintering is adopted, after sintering, aluminum oxide and silicon carbide form a nano ceramic composite material, graphene modifies silicon carbide aluminum oxide ceramic, and the prepared composite material has good fracture toughness, electrical conductivity, thermal conductivity and the like. The ceramic composite material prepared by the method is simple in process and high in universality, the mold-free additive manufacturing of the ceramic composite material is realized, the production cost is greatly reduced, and the economic benefit is good.

Description

technical field [0001] The invention belongs to the technical field of ceramic composite materials, and relates to 3D printing technology, in particular to a graphene ceramic composite material prepared based on 3D printing and a preparation method thereof. Background technique [0002] Modern ceramic materials have many excellent properties such as high temperature resistance, high hardness, wear resistance, corrosion resistance and light relative density, making them have the potential to replace metals as high-temperature structural materials. However, the shortcomings of ceramic materials such as high brittleness, poor thermal shock resistance, and the sensitivity of ceramic materials to cracks, pores and fine defects of inclusions hinder their practical application. Ceramic composite materials are composite materials with fibers, whiskers or particles as reinforcements and ceramics as the matrix. The whiskers commonly used in reinforced ceramic composites include silic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117C04B35/81C04B35/636C04B35/634C04B35/64C04B35/622B28B1/00B28B11/24B33Y70/10B33Y10/00
CPCC04B35/117C04B35/6365C04B35/63416C04B35/64C04B35/622B28B1/001B28B11/243B33Y70/10B33Y10/00C04B2235/3826C04B2235/425C04B2235/5436C04B2235/658C04B2235/667C04B2235/6562C04B2235/6567
Inventor 王宏明李凯李桂荣
Owner JIANGSU UNIV
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