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Ceramic product and preparation method thereof

A product, a technology of ceramics, applied in the field of ceramic products and its preparation, can solve problems such as product structure looseness, achieve uniform distribution, increase strength, and increase density

Active Publication Date: 2018-02-13
BEIHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ceramic products manufactured by this process generally have the disadvantage of loose product structure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The invention provides a kind of preparation method of ceramic product, comprises the following steps:

[0031] (1) Activate the nano-ceramic powder in lye and acid solution sequentially to obtain activated ceramic powder;

[0032] (2) granulating after mixing the activated ceramic powder with a surfactant and a binding agent to obtain ceramic particles;

[0033] (3) coating the ceramic particles in a mixed solution including a crosslinking agent and a lubricant to obtain coated ceramic particles;

[0034] (4) Under an inert atmosphere, the coated ceramic particles are used for layering to obtain a powder layer;

[0035] (5) under computer control, according to the layering results of the three-dimensional model, using energy beams to selectively sensitize and crosslink the powder layer to obtain a rough billet;

[0036] (6) performing low-temperature sintering and high-temperature sintering sequentially on the final rough body to obtain ceramic products;

[0037] Th...

Embodiment 1

[0070] Prepare dilute sodium bicarbonate solution (pH=12), dilute hydrochloric acid solution (pH=3);

[0071] Alumina powder (Al 2 o 3 ) soaked in dilute sodium bicarbonate solution for 3 minutes and dilute hydrochloric acid for 1 minute (the volume ratio of aluminum oxide powder to dilute sodium bicarbonate solution and dilute hydrochloric acid is 3:1), wash with deionized water and Dried, call it A.

[0072] By weight, the nano-alumina powder (Al 2 o 3 ) 100 parts, silicone 3 parts, non-ionic surfactant (YD10) 0.6 parts heated and dissolved in an appropriate amount of carbon tetrachloride, called B.

[0073] B is ball milled, the rotating speed of the ball mill is 800 rpm, and the time of ball milling is 1 hour.

[0074] The slurry should be stirred at 60°C for 6 hours, granulated, and the solvent recovered to obtain particles with a particle size of 100 microns, called C. When spraying, the feed rate is 15 ml / min, the nozzle air flow rate is 0.1 MPa, the air inlet tem...

Embodiment 2

[0085] Prepare dilute sodium bicarbonate solution (pH=12), dilute hydrochloric acid solution (pH=3);

[0086] Zirconia powder (ZrO) with an average particle size of 80 nm 2) were soaked in dilute sodium bicarbonate solution for 3 minutes, and dilute hydrochloric acid for 1 minute (the volume ratio of zirconia powder, dilute sodium bicarbonate solution, and dilute hydrochloric acid were both 3:1), and washed in deionized water. and dry, call it A.

[0087] Heat and dissolve 100 parts of A, 5 parts of polymethyl acrylate, and 2 parts of nonionic surfactant (YD10) in ethanol, called B.

[0088] B is ball milled, the rotating speed of the ball mill is 1000 rpm, and the time of ball milling is 1.5 hours.

[0089] The slurry was stirred at 50° C. for 5 hours, and granulated to obtain particles with a particle size of 80 microns, called C. When spraying, the feed rate is 15 ml / min, the nozzle air flow rate is 0.1 MPa, the air inlet temperature is 400°C, and the outlet temperature ...

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Abstract

The invention provides a ceramic product and a preparation method thereof. Ceramic particles are coated by using a cross-linking agent and a lubricating agent, so that the distribution of the cross-linking agent in a ceramic body is uniform, the binding effect among ceramic particles is enhanced, the strength of the ceramic body is improved, and the cross-linking agent is easily removed during sintering. Meanwhile since nano ceramic powder serves as a raw material, the manufacturing precision and product surface quality are improved, and partial products with low glaze requirements can be completely molded at a time. Moreover, due to high surface activity of the nano powder, the sintering temperature and temperature maintaining time can be reduced, and product deformation caused by a hightemperature can be greatly reduced; dense nano powder contributes to forming dense grains, and the mechanical property of the product is improved. Furthermore, since the outer layer of the spray is coated with the lubricating agent, friction in the powder and between the powder and the sprayer can be reduced while powder agglomeration is inhibited, and the powder laying efficiency and compaction degree are improved.

Description

technical field [0001] The invention relates to the technical field of ceramic products, in particular to a ceramic product and a preparation method thereof. Background technique [0002] Additive manufacturing is a new manufacturing technology that emerged in the 1990s. It uses the method of gradually accumulating materials to manufacture solid parts. Compared with the traditional cutting / removal processing technology, it is a "bottom-up" manufacturing method. Additive manufacturing does not require traditional tools, fixtures and multiple processing procedures. It can quickly and precisely manufacture complex structural parts that are difficult to prepare with traditional production techniques on one piece of equipment, greatly reducing the processing procedures and shortening the processing cycle. [0003] The traditional ceramic preparation process mainly includes the steps of powder preparation, blank preparation, forming, drying, sintering and post-processing. With th...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/48C04B35/626C04B35/634B28B1/00B28B17/02B33Y10/00B33Y70/00
CPCB28B1/001B28B17/026B33Y10/00B33Y70/00C04B35/10C04B35/48C04B35/62695C04B35/634C04B35/63408C04B2235/3225C04B2235/5454C04B2235/661C04B2235/96
Inventor 白致铭杨中甲孙井永
Owner BEIHANG UNIV
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