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A kind of silicon carbide green body for bulletproof plate and preparation method thereof

A technology of silicon carbide blanks and bulletproof plates, which is applied in the field of ceramic production, can solve the problems that the fracture toughness does not meet the bulletproof requirements, cannot make bulletproof plates, and the yield of green bodies is low, so as to achieve high overall yield, good fracture toughness, The effect of high bending strength

Active Publication Date: 2017-12-29
SHANDONG JINHONG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when reaction sintered silicon carbide ceramics are used as general refractory, wear-resistant and corrosion-resistant materials, the density can only be (2.98-3.03) g / cm 3 between
[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following deficiencies: at present, in the production of reaction sintered silicon carbide ceramic bulletproof plate materials, the blank is easy to crack and deform during the production process, and the yield of the blank is low. It is easy to cause the product density, bending strength, and fracture toughness to fail to meet the bulletproof requirements, and it is impossible to use the reaction sintered silicon carbide ceramic process to make the overall bulletproof plate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, a silicon carbide green body for bulletproof boards, prepared from the main material and auxiliary materials, the main material is silicon carbide, and the auxiliary materials are carbon powder, sodium carboxymethyl cellulose powder and polyvinylpyrrolidone K30 powder.

[0033] The ratio of raw materials in parts by weight is: the particle size of silicon carbide micropowder is 300 mesh to 4000 mesh, and its proportioning is 10 parts of 4000 mesh, 25 parts of 2500 mesh, 45 parts of 300 mesh, 20 parts of 3500 mesh carbon powder, 80 - 1 part of 120 mesh sodium carboxymethylcellulose powder, 4 parts of 120 mesh polyvinylpyrrolidone K30 powder.

Embodiment 2

[0034] Embodiment 2, a method for preparing a silicon carbide green body for a bulletproof plate, comprising the following steps:

[0035] (1) Slurry preparation: Take various powders by weight, 10 parts of silicon carbide micropowder of 3800-5000 mesh, 25 parts of silicon carbide micropowder of 1250-3500 mesh, 45 parts of silicon carbide micropowder of 250-450 mesh, 3500 mesh carbon 20 parts of powder, 1 part of sodium carboxymethylcellulose, 4 parts of polyvinylpyrrolidone K30 powder, add 50 parts of water, add in a mixing tank and stir for 4 hours, then pump it into a ball mill with a diaphragm pump and mill for 6 hours to obtain a slurry.

[0036] (2) Granulation: Use a diaphragm pump to pump the slurry milled in step 1 into the slurry with a mixer for granulation, and the particle size obtained is 80 mesh to 200 mesh.

[0037] (3) Humidification: Humidify the particles obtained in step 2 with a particle size of 80 mesh to 200 mesh with ethanol to the required uniform humi...

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PUM

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Abstract

The invention relates to a silicon carbide green body for bulletproof boards, which is prepared from silicon carbide micropowder, carbon powder, sodium carboxymethyl cellulose powder and polyvinylpyrrolidone K30 powder, and the ball milled slurry is pumped to the Carry out granulation in the slurry with agitator, the particle size obtained is 80-200 mesh, the particles with particle size of 80-200 mesh are humidified with ethanol, the water content is 3%-5%, sealed for 3.5-4.5 hours, The blank is pressed by a hydraulic press, and the press is used for automatic cloth secondary exhaust and pressurization. The density of the blank is high after baking, which reduces the cracking and deformation problems during the baking process of the blank, and the overall yield of the bulletproof plate is high.

Description

technical field [0001] The invention relates to a forming method of reaction sintered silicon carbide ceramics, in particular to a silicon carbide green body for a bulletproof plate and a preparation method thereof, belonging to the field of ceramic production. Background technique [0002] Silicon carbide ceramics have excellent characteristics such as high mechanical strength, high temperature resistance, strong oxidation resistance, good thermal stability, high thermal conductivity, good wear resistance, good chemical corrosion resistance, high hardness, and good thermal shock resistance. Reaction sintered silicon carbide is a new type of high-tech ceramics, widely used in metallurgy, petroleum, chemical industry, electronics, ceramics, and electric porcelain kiln furniture. The basic principle of reaction sintered silicon carbide ceramics is: reactive liquid silicon or gaseous silicon, infiltrated into a carbon-containing porous ceramic green body under capillary action,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/622
Inventor 王汝江张怀顺于海培
Owner SHANDONG JINHONG NEW MATERIAL CO LTD