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SiC aqueous tape casting preparation method

A water-based casting, ceramic slurry technology, applied in the direction of manufacturing tools, ceramic molding machines, etc., can solve the problems of high cost and toxic organic solvents, and achieve the effect of good ductility and low cost

Inactive Publication Date: 2018-01-19
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most organic solvents are toxic and expensive

Method used

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  • SiC aqueous tape casting preparation method
  • SiC aqueous tape casting preparation method
  • SiC aqueous tape casting preparation method

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Embodiment Construction

[0027] In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The reagents and instruments used in the following examples are shown in Table 1. The powder directly selects purchased SiC ceramic powder with a purity of 99.9%.

[0029] Table 1 Reagents used in the experiment and their functions

[0030]

[0031] Using a particle size analyzer, analyze the diameter of the SiC particles. Such as figure 1 As shown, most of the SiC particle sizes are distributed between 180-450nm. The average particle diameter of the SiC particles is about 300 nm.

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Abstract

The invention discloses an SiC aqueous tape casting preparation method, which comprises the following steps that ceramic powder, ammonia water with the PH being 10 and a dispersant are subjected to mixed ball grinding to obtain homogenous ceramic slurry; a binding agent, a plasticizer and a surfactant are proportionally added into the obtained homogenous ceramic slurry; secondary ball grinding isperformed to obtain ceramic slurry; the obtained ceramic slurry is sequentially subjected to bubble removal, tape casting, drying, film uncovering and cutting treatment, wherein the binding agent is PVA with the mass percent being 7 percent; the addition quantity of the PVA is 8 percent of the mass of the ceramic powder; the dispersant is TMAH (tetramethylammonium hydroxide); the surfactant is Surfynol SE-F; the addition quantity of the Surfynol SE-F is 3 percent of the total mass of the ceramic slurry; the plasticizer is glycerinum. An obtained SiC membrane sheet has good ductility, toughnessand uniformity, and certain tensile strength.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a water-based casting preparation method of SiC. Background technique [0002] SiC has become a very promising high-temperature structural material due to its high hardness, oxidation resistance, and high temperature resistance. The SiC composite ceramic material can combine the characteristics of high hardness and high temperature resistance of SiC ceramics and the advantages of strong and tough materials, and is a new material with both comprehensive properties. However, SiC also faces limitations such as harsh preparation and sintering conditions. How to improve the preparation process of SiC materials and study the relationship between the thermal stability and high hardness of SiC materials and the preparation process are urgent problems to be solved in the application. [0003] SiC has many crystal forms. Generally, there are α and β phases. α-SiC is formed above 170...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B35/622B28B1/29
Inventor 范桂芬郝孟猛王晓川梁飞史玉升李晨辉周静怡王为
Owner HUAZHONG UNIV OF SCI & TECH
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