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Preparation method of silicon-carbide square beams through extruding, molding, reacting and sintering

An extrusion molding and silicon carbide square technology is applied in the field of preparation of extrusion molding reaction sintered silicon carbide square beams, which can solve the problems of unstable product performance, low production efficiency, large floor space, etc., and achieve high overall reliability. , The effect of high production efficiency and improved green body strength

Inactive Publication Date: 2011-01-05
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Extrusion molding reaction sintered silicon carbide square beams are currently produced by slip casting technology. The disadvantages of this method are low production efficiency, manual operation, large floor area, and unstable product performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Extrusion molding reaction sintered silicon carbide square beam molding

[0019] First, mix 3 parts (by weight) of carbon fiber with a diameter of 0.1 μm and a length of 3 mm and 2 parts of liquid paraffin evenly, then add 85 parts of silicon carbide powder with a particle size of 100 μm, and 10 parts of phenolic resin. The silicon carbide ceramic plastic mud is made by kneading in the middle, and extruded, and cut to make a silicon carbide ceramic square beam body.

[0020] 2. Curing:

[0021] The formed silicon carbide ceramic square beam body was cured at 40°C for 12 hours, at 80°C for 12 hours, and at 140°C for 6 hours.

[0022] 3. Firing:

[0023] The solidified extrusion-molded reaction-sintered silicon carbide square beam green body was fired at 2000° C. for 2 hours in a nitrogen atmosphere to produce an extrusion-molded reaction-sintered silicon carbide square beam. The tested compressive strength is 260MPa.

Embodiment 2

[0025] 1. Extrusion molding reaction sintered silicon carbide square beam molding

[0026] First, mix 10 parts (parts by weight) of carbon fiber with a diameter of 3 μm and a length of 2 mm and 5 parts of liquid paraffin evenly, then add 65 parts of silicon carbide powder with a particle size of 50 μm, and 20 parts of phenolic resin. Knead to make silicon carbide ceramic plastic mud, extrude and cut to make silicon carbide ceramic square beam body.

[0027] 2. Curing:

[0028] The formed silicon carbide ceramic square beam body was cured at 30°C for 24 hours, at 60°C for 24 hours, and at 100°C for 12 hours.

[0029] 3. Firing:

[0030] The solidified extrusion-molded reaction-sintered silicon carbide square beam green body was fired at 1580° C. for 4 hours in a nitrogen atmosphere to produce an extrusion-molded reaction-sintered silicon carbide square beam. The tested compressive strength is 280MPa.

Embodiment 3

[0032] 1. Extrusion molding reaction sintered silicon carbide square beam molding

[0033] First, mix 7 parts of carbon fiber with a diameter of 20 μm and a length of 1 mm (parts by weight) and 3 parts of liquid paraffin, and then add 20 parts of silicon carbide powder with a particle size of 10 μm, 10 parts of 1 μm silicon carbide powder, and 5 μm silicon carbide powder. 45 parts and 15 parts of phenolic resin were evenly mixed, kneaded in a vacuum mud mixer to make silicon carbide ceramic plastic mud, extruded and cut to make silicon carbide ceramic square beam body.

[0034] 2. Curing:

[0035] The formed silicon carbide ceramic square beam body was cured at 50°C for 18 hours, at 85°C for 18 hours, and at 130°C for 9 hours.

[0036] 3. Firing:

[0037] The solidified extrusion-molded reaction-sintered silicon carbide square beam green body was fired at 1750° C. for 3 hours in a nitrogen atmosphere to produce an extrusion-molded reaction-sintered silicon carbide square bea...

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Abstract

The invention provides a preparation method of silicon-carbide square beams through extruding, molding, reacting and sintering. The preparation method comprises the steps of ceramic mud preparation, molding, solidifying and sintering and is characterized by evenly mixing the following raw materials in parts by weight: 65-85 parts of silicon-carbide powder with the granularity d50 smaller than 100microns, 3-10 parts of carbon fiber, 10-20 parts of plastic agent and 2-5 parts of liquid paraffin in a vacuum mud-refining machine to prepare silicon-carbide porcelain plastic mud; and extruding andmolding the silicon-carbide porcelain plastic mud, cutting into silicon-carbide porcelain plastic square beams and solidifying into blanks. The silicon-carbide square beams prepared by extruding, molding, reacting and sintering have high strength and production efficiency and can carry out continuous mass production.

Description

technical field [0001] The invention relates to a method for preparing an extrusion-molded reaction-sintered silicon carbide square beam, which belongs to the technical field of ceramic preparation. Background technique [0002] Extrusion molding reaction sintered silicon carbide square beams are currently produced by slip casting technology. The disadvantages of this method are low production efficiency, manual operation, large floor area, and unstable product performance. Contents of the invention [0003] The object of the present invention is to provide a method for preparing an extrusion-molded reaction-sintered silicon carbide square beam that can overcome the above-mentioned defects and is suitable for continuous large-scale production. The product has high strength and high production efficiency. [0004] The preparation method of the extrusion molding reaction sintered silicon carbide square beam of the present invention comprises the preparation, molding, solidif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/622B28B3/00
Inventor 唐竹兴
Owner SHANDONG UNIV OF TECH
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