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A kind of heat-conducting anisotropic SIC composite ceramic bulk material and its preparation method

A technology of composite ceramics and bulk materials is applied in the field of inorganic non-metallic materials to achieve the effects of low cost, broad application prospects and simple process

Active Publication Date: 2019-10-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the application of thermally conductive anisotropic materials in the field of high-energy laser weapon protection.

Method used

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  • A kind of heat-conducting anisotropic SIC composite ceramic bulk material and its preparation method
  • A kind of heat-conducting anisotropic SIC composite ceramic bulk material and its preparation method
  • A kind of heat-conducting anisotropic SIC composite ceramic bulk material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of thermally conductive anisotropic SiC composite ceramic bulk material containing 5wt% graphene:

[0034] Step 1. 85.5g of silicon carbide with an average particle size of 0.5 μm, 5 g of graphene with a diameter of 5 μm to 10 μm, 5.42 g of yttrium oxide with an average particle size of 0.3 μm, 4.08 g of aluminum oxide with an average particle size of 0.5 μm, and Put zirconia balls with different particle sizes into the ball milling jar, then add absolute ethanol to 2 / 3 of the volume of the ball milling jar, then place the ball milling jar in an ultrasonic instrument for 30 minutes, and then put it into a planetary ball mill at 400r / Ball mill for 6 hours at a rotating speed of 1 min to obtain a uniformly mixed slurry; put the uniformly mixed slurry into a rotary evaporator heated by a water bath, and then remove anhydrous ethanol, and then place the rotary-evaporated solid in a constant temperature drying oven at 80°C for 24 hours to obtain a dry powder;

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Embodiment 2

[0040] Preparation of thermally conductive anisotropic SiC composite ceramic bulk material containing 5wt% graphene oxide:

[0041] Step 1. 85.5g of silicon carbide with an average particle size of 0.5μm, 5g of graphene oxide with a diameter of 1μm to 5μm, 5.42g of yttrium oxide with an average particle size of 0.3μm, and 4.08g of alumina with an average particle size of 0.5μm And zirconia balls with different particle sizes are added to the ball milling tank, then add absolute ethanol to 2 / 3 of the volume of the ball milling tank, and then put the ball milling tank in an ultrasonic instrument for 30 minutes, and then put it into a planetary ball mill at 400r Ball milling at a rotating speed of 30r / min for 6 hours to obtain a uniformly mixed slurry; put the uniformly mixed slurry into a rotary evaporator heated by a water bath, and then remove impurities at a rotating speed of 30r / min and a heating temperature of a water bath of 70°C. water and ethanol, and then place the rota...

Embodiment 3

[0047] Preparation of thermally conductive anisotropic SiC composite ceramic bulk material containing 3wt% graphene:

[0048] Step 1. 87.3g of silicon carbide with an average particle size of 0.5 μm, 3 g of graphene with a diameter of 5 μm to 10 μm, 5.53 g of yttrium oxide with an average particle size of 0.3 μm, 4.17 g of aluminum oxide with an average particle size of 0.5 μm, and Put zirconia balls with different particle sizes into the ball milling jar, then add absolute ethanol to 2 / 3 of the volume of the ball milling jar, then place the ball milling jar in an ultrasonic instrument for 30 minutes, and then put it into a planetary ball mill at 300r / Ball mill for 8 hours at a rotating speed of min to obtain a uniformly mixed slurry; put the uniformly mixed slurry into a rotary evaporator heated by a water bath, and then remove anhydrous ethanol, and then place the rotary-evaporated solid in a constant temperature drying oven at 100°C for 20 hours to obtain a dry powder;

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Abstract

The invention relates to a heat conduction anisotropic SiC composite ceramic block material and a preparation method and belongs to the technical field of inorganic non-metallic materials. The composite ceramic block material is composed of silicon carbide, a sheet-layer-shaped carbon material and yttrium aluminum garnet. The preparation method includes the following preparation steps that silicon carbide, the sheet-layer-shaped carbon material, yttrium oxide, aluminum oxide and anhydrous ethanol are added into a ball-milling tank to be subjected to ball milling, a ball-milled sizing agent is placed into a rotary evaporation instrument to remove anhydrous ethanol; solids obtained after rotary evaporation are dried, and dried powder is obtained; and the dried powder is placed into a graphite mold and then is placed into a discharge plasma sintering furnace to be subjected to pressure sintering, furnace cooling is performed, and the solids in the graphite mold are the heat conduction anisotropic SiC composite ceramic block material. The method is simple in process and low in cost; and the prepared composite ceramic block material can achieve that heat is fast conducted all around, meanwhile, a heat insulating protection effect on a matrix is achieved, and an effective protection effect is achieved.

Description

technical field [0001] The invention relates to a thermally conductive anisotropic SiC composite ceramic block material and a preparation method thereof, belonging to the technical field of inorganic non-metallic materials. Background technique [0002] In recent years, due to some characteristics of laser, it has been applied in many fields, and the use of laser as a weapon has become a research hotspot in various countries. At present, high-energy laser weapons have been applied in sea-based, land-based and air-based defense systems. High-energy laser weapons can disable or destroy military targets, and can be used in defense systems against aircraft such as missiles, satellites, and drones. Therefore, research on laser protective materials is imminent. [0003] Thermal damage is one of the main mechanisms for laser weapons to destroy targets. That is, when the radiation power received by the target reaches a certain value when the radiation power received by the target r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/622
Inventor 高丽红魏彬彬马壮王富耻
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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