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Preparation method of high-quality ceramic flat plate

A high-quality, flat-panel technology used in the field of ceramics to improve performance, enhance integration, and reduce interfacial voids

Active Publication Date: 2022-04-12
无锡特科精细陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a method for preparing a high-quality ceramic flat panel, which solves the defects of the existing large-area ceramic flat panel, uses powder dry pressing and isostatic pressing to form a high-pressure compact structure, and utilizes the active alumina The hydroxyl structure promotes the powder to form a tight connection and improves the performance of ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of preparation method of high-quality ceramic plate, comprises the steps:

[0020] Step 1: Add POSS to hydrochloric acid for ultrasonic treatment for 20 minutes, take out the precipitate and put it into sodium hydroxide solution for microwave treatment for 1 hour, take it out, wash and dry to obtain hydroxylated POSS; the pH of the hydrochloric acid is 5, and the POSS is dissolved in hydrochloric acid The concentration in the solution is 50g / L, the temperature of the ultrasonic treatment is 50°C, the ultrasonic frequency is 50kHz, the concentration of the sodium hydroxide is 0.03mol / L, the pH of the microwave reaction is 8, the temperature of the microwave treatment is 70°C, and the microwave The power is 400W, and the drying temperature is 120°C;

[0021] Step 2: Add aluminum isopropoxide into ethanol and stir evenly to form a solution, then put the hydroxylated POSS into it and treat it with low-temperature microwave for 20 minutes, then treat it at a constant ...

Embodiment 2

[0028] A kind of preparation method of high-quality ceramic plate, comprises the steps:

[0029] Step 1, adding POSS to hydrochloric acid for ultrasonic treatment for 30 minutes, taking out the precipitate and putting it into sodium hydroxide solution for microwave treatment for 2 hours, taking it out, washing and drying to obtain hydroxylated POSS; the pH of the hydrochloric acid is 6, and the POSS is dissolved in hydrochloric acid The concentration in the solution is 100g / L, the temperature of the ultrasonic treatment is 80°C, the ultrasonic frequency is 50-80kHz, the concentration of the sodium hydroxide is 0.05mol / L, the pH of the microwave reaction is 9, and the temperature of the microwave treatment is 90°C , the microwave power is 700W, and the drying temperature is 140°C;

[0030] Step 2: Add aluminum isopropoxide into ethanol and stir evenly to form a solution, then put the hydroxylated POSS into it and treat it with low-temperature microwave for 30 minutes, then trea...

Embodiment 3

[0037] A kind of preparation method of high-quality ceramic plate, comprises the steps:

[0038] Step 1, adding POSS to hydrochloric acid for ultrasonic treatment for 25 minutes, taking out the precipitate, putting it into sodium hydroxide solution for microwave treatment for 2 hours, taking it out, washing and drying to obtain hydroxylated POSS; the pH of the hydrochloric acid is 6, and the POSS is dissolved in hydrochloric acid The concentration in the solution is 80g / L, the temperature of the ultrasonic treatment is 70°C, the ultrasonic frequency is 70kHz, the concentration of the sodium hydroxide is 0.04mol / L, the pH of the microwave reaction is 8, the temperature of the microwave treatment is 80°C, and the microwave The power is 500W, and the drying temperature is 130°C;

[0039] Step 2: Add aluminum isopropoxide into ethanol and stir evenly to form a solution, then put the hydroxylated POSS into it and treat it with low-temperature microwave for 25 minutes, then treat it...

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Abstract

The invention belongs to the field of ceramics, and particularly relates to a preparation method of a high-quality ceramic flat plate, which comprises the following steps: adding POSS (Polyhedral Oligomeric Silsesquioxane) into hydrochloric acid, carrying out ultrasonic treatment for 20-30 minutes, taking out a precipitate, putting the precipitate into a sodium hydroxide solution, carrying out microwave treatment for 1-2 hours, taking out, washing and drying to obtain hydroxylated POSS; the preparation method comprises the following steps: adding aluminum isopropoxide into ethanol, uniformly stirring to form a dissolving solution, putting hydroxylated POSS into the dissolving solution, carrying out low-temperature microwave treatment for 20-30 minutes, carrying out constant-temperature treatment for 30-50 minutes to form a concentrated solution, taking out the concentrated solution, naturally airing the concentrated solution, and carrying out heating treatment to obtain aluminoxyl modified POSS; carrying out ball milling on nano aluminum oxide, aluminoxyl modified POSS, methyl cellulose and an ethanol water solution, and carrying out constant-temperature treatment for 20-30 minutes to obtain slurry; carrying out vacuum stirring and defoaming on the slurry, and then carrying out tape casting and preliminary sintering to obtain a ceramic green body; coating the surface of the ceramic green body with silicon-aluminum liquid, coating the surface with aluminum foil after drying, carrying out microwave treatment for 20-40 minutes, and cooling and standing to obtain a pretreated flat plate; and carrying out presintering treatment on the pretreated flat plate for 1-2 hours, and carrying out isostatic pressing treatment for 2-5 hours to obtain the high-quality ceramic flat plate.

Description

technical field [0001] The invention belongs to the field of ceramics, and in particular relates to a preparation method of a high-quality ceramic flat plate. Background technique [0002] Ceramic materials refer to a class of inorganic non-metallic materials made of natural or synthetic compounds through shaping and high-temperature sintering. It has the advantages of high melting point, high hardness, high wear resistance and oxidation resistance. It can be used as structural material, tool material, and because ceramics also have some special properties, they can also be used as functional materials. [0003] The main component of alumina ceramics is alumina, generally with a content greater than 45%. Alumina ceramics have various excellent properties. High temperature resistance, generally can be used for a long time at 1600 ° C, corrosion resistance, high strength, its strength is 2-3 times that of ordinary ceramics, and the highest can reach 5-6 times. Its disadvan...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622C04B41/87
Inventor 刘名剑王征
Owner 无锡特科精细陶瓷有限公司
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