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Production technique of modified silicon carbide ceramic slurry

A technology of silicon carbide ceramics and production process, which is applied in the field of ceramic slurry, can solve the problems of low machinability, limited application range, etc., and achieve the effect of high stability

Inactive Publication Date: 2016-08-24
任海涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low machinability of ceramics, its application range is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The production technology of the modified silicon carbide ceramic slurry of embodiment 1, comprises the following steps:

[0016] S1: Mix silicon carbide micropowder with hydrochloric acid with a mass concentration of 5%, prepare a suspension with a solid phase volume content of 18%, and stir continuously for 20 hours;

[0017] S2: The suspension obtained in S1 is centrifuged, and the solid product is repeatedly washed with distilled water until the solution is neutral;

[0018] S3: Put the solid obtained in S2 in a ball mill for 24 hours, prepare a suspension with a solid phase volume content of 18%, add a coupling agent, heat to 90°C, centrifuge, and dry in a constant temperature oven at 110°C 24h;

[0019] S4: Mix the solid obtained in S3 with tetramethylammonium hydroxide and a stabilizer, ball mill for 16 hours to obtain an alkaline mixed solution, add hydrochloric acid to adjust the pH value to 11.5, and prepare a modified silicon carbide ceramic slurry.

[0020...

Embodiment 2

[0023] The production technology of the modified silicon carbide ceramic slurry of embodiment 2 comprises the following steps:

[0024] S1: Mix silicon carbide micropowder with hydrochloric acid with a mass concentration of 5%, prepare a suspension with a solid phase volume content of 22%, and stir continuously for 24 hours;

[0025] S2: The suspension obtained in S1 is centrifuged, and the solid product is repeatedly washed with distilled water until the solution is neutral;

[0026] S3: put the solid obtained in S2 into a ball mill for 36 hours, prepare a suspension with a solid phase volume content of 22%, add a coupling agent, heat to 90°C, centrifuge, and dry in a constant temperature oven at 110°C 24h;

[0027] S4: Mix the solid obtained in S3 with tetramethylammonium hydroxide and a stabilizer, ball mill for 20 hours to obtain an alkaline mixed solution, add hydrochloric acid to adjust the pH value to 11.5, and prepare a modified silicon carbide ceramic slurry.

[002...

Embodiment 3

[0031] The production technology of the modified silicon carbide ceramic slurry of embodiment 3 comprises the following steps:

[0032] S1: Mix silicon carbide micropowder with hydrochloric acid with a mass concentration of 5%, prepare a suspension with a solid phase volume content of 20%, and stir continuously for 22 hours;

[0033] S2: The suspension obtained in S1 is centrifuged, and the solid product is repeatedly washed with distilled water until the solution is neutral;

[0034] S3: Put the solid obtained in S2 in a ball mill for 30 hours, prepare a suspension with a solid phase volume content of 20%, add a coupling agent, heat to 90°C, centrifuge, and dry in a constant temperature oven at 110°C 24h;

[0035] S4: Mix the solid obtained in S3 with tetramethylammonium hydroxide and a stabilizer, ball mill for 18 hours to obtain an alkaline mixed solution, add hydrochloric acid to adjust the pH value to 11.5, and prepare a modified silicon carbide ceramic slurry.

[0036]...

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PUM

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Abstract

The invention discloses a production technique of a modified silicon carbide ceramic slurry. The production technique comprises the following steps: impurity removal, separation, modification and slurrying. The silane coupling agent can improve the surface functional group structure of the silicon carbide micropowder; compared with the unmodified SiC powder, the C-H stretching vibration peak, -C- skeletal vibration band and C-O stretching vibration peak are newly added, and the Si-O stretching vibration peak can be enhanced. The slurry prepared from the silane-coupling-agent-modified silicon carbide micropowder has lower viscosity and higher stability, thereby satisfying the requirements for injection molding.

Description

technical field [0001] The invention relates to the field of ceramic slurry, in particular to a production process of modified silicon carbide ceramic slurry. Background technique [0002] Silicon carbide ceramics have attracted more and more attention due to their excellent high temperature strength, wear resistance, corrosion resistance and thermal shock resistance. In recent years, they have been widely used in the field of refractories, especially as cement kilns, suspension pre- Insulation lining for heaters, etc. However, its application range is limited due to the low machinability of ceramics. Grouting molding is a simple, easy-to-operate, and low-cost industrial production molding method that can be used in mass production. The key to this molding process is to prepare a uniform and stable ceramic slurry with high solid content and low viscosity. . In the grouting molding process of SiC, as the gypsum mold further absorbs the water in the green body, the high sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/632B09B3/00
Inventor 任海涛
Owner 任海涛