Preparation method and shape fixing method of ceramic slurry

A technology of ceramic slurry and ceramic powder, applied in the field of ceramics, can solve the problems of unfavorable ceramic electronic device manufacturing, complex photo-curing process engineering, prone to cracks or deformation, etc., to accelerate the photo-curing molding process and shorten the surface solidification time. , the effect of enhancing the quality

Active Publication Date: 2021-10-29
原粒威(深圳)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The SLA and DLP light-curing molding process of ceramic products is similar to the light-curing process of photosensitive resin. more complicated
At the same time, the concentration of photosensitive organic materials in the ceramic slurry is much higher than that used in the traditional mechanical molding process, which makes the ceramic green body after photocuring take longer to degrease; the shrinkage rate of the sintered ceramic product is much higher than that of the traditional mechanical molding process. Traditional mechanical molding products are prone to cracks or deformation, which is not conducive to the manufacture of precision MLCC and other ceramic electronic devices

Method used

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  • Preparation method and shape fixing method of ceramic slurry

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Mix and ball mill 3vol% oxides, the oxides include oxide A and oxide B, add 18vol% photosensitive resin and 2vol% additives, stir and mix, add 77vol% ceramic powder, stir and homogenize, and obtain a solid content of 82% ceramic slurry.

[0027]Step 2: Set the light-curing wavelength to 400nm, and print the ceramic slurry layer by layer through a DLP-type light-curing 3D printer. Dry in an oven at 60°C for 2 hours, transfer to a debinding furnace with an inert atmosphere, and heat up to 500°C at a heating rate of 2°C / min under the irradiation of an ultraviolet lamp with a wavelength of 400nm; Degrease for 1 hour; dry again, transfer to a vacuum or inert gas sintering furnace, and sinter at a controlled temperature to obtain a ceramic product.

[0028] In this scheme, oxide A is 10nm SiO 2 ;Oxide B is 20nm TiO 2 . Photosensitive resin urea-formaldehyde resin. Ceramic powder is 250nm Al 2 o 3 And alkali metal titanate mixture, under UVA conditions, the spec...

Embodiment 2

[0030] Step 1: Mix and ball mill 4vol% oxides, the oxides include oxide A and oxide B, add 45vol% photosensitive resin and 1vol% additives, stir and mix, add 50vol% ceramic powder, stir and homogenize, and obtain a solid content of 55% ceramic slurry.

[0031] Step 2: Set the light-curing wavelength to 400nm, and print the ceramic slurry layer by layer through an SLA-type light-curing 3D printer. Dry in an oven at 60°C for 2 hours; transfer to a debinding furnace with an inert atmosphere, and under the irradiation of a UV lamp with a wavelength of 400nm, the temperature rises at a rate of 2°C / min to 500°C; hour, degrease; dry again, transfer to vacuum or inert gas sintering furnace, temperature control sintering, to obtain ceramic products.

[0032] In this scheme, oxide A is 5nm Al 2 o 3 ;Oxide B is 15nm TiO 2 . The photosensitive resin is polyaldehyde resin. The ceramic powder is alkali metal titanate with a thickness of 100 nm, and the spectral light transmittance is ...

Embodiment 3

[0034] Step 1: Mix and ball mill 1vol% oxides, the oxides include oxide A and oxide B, add 10vol% photosensitive resin and 4vol% additives, stir and mix, add 85vol% ceramic powder, stir and homogenize, and obtain a solid content of 85% ceramic slurry.

[0035] Step 2: Set the light-curing wavelength to 300nm, and print the ceramic slurry layer by layer through a DLP-type light-curing 3D printer. Dry in an oven at ℃ for 1 hour, transfer to a debinding furnace with an inert atmosphere, use an oxalic acid catalyst under the irradiation of a UV lamp with a wavelength of 300nm, and set the temperature at 150℃ to degrease; dry again, and transfer to vacuum or inert gas In a sintering furnace, the temperature is controlled and sintered to obtain ceramic products.

[0036] In this scheme, oxide A is 20nm SiO 2 、Al 2 o 3 , ZrO 2 One or more of , CaO, MgO; oxide B is 40nm silicon dioxide surface-modified TiO 2 . The photosensitive resin is polyaldehyde resin. Ceramic powder is 5...

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Abstract

The invention discloses a preparation method and a shape fixing method of ceramic slurry. The method comprises the following steps: mixing and ball-milling an oxide, adding photosensitive resin and an auxiliary agent, stirring and mixing, adding ceramic powder, and stirring and homogenizing to obtain the ceramic slurry with the solid content of more than 50%. And a photo-curing 3D printer is utilized to apply the ceramic slurry to preparation of ceramic products with high precision and excellent surface quality. The method has the beneficial effects that by optimizing the composition and the proportion of the ceramic slurry, surface rapid shaping is completed under the condition that the ultraviolet exposure intensity is not improved, and photocuring 3D printing of a high-solid-phase material is achieved. In the degreasing process, an ultraviolet recuring process is introduced, the shape-preserving degreasing effect is achieved, and the problems of collapse, cracks and the like caused by stress change of the ceramic green body in the traditional degreasing process are solved. In the degreasing process, the photocatalytic degreasing technology is introduced, decomposition of organic matter is further completed, complete degreasing is achieved, and the degreasing time is shortened. The process level that the solid phase content of the ceramic green body exceeds 90% is achieved.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a preparation method and solidification method of ceramic slurry. Background technique [0002] Due to their excellent properties such as high hardness, high wear resistance, high temperature resistance, oxidation resistance, corrosion resistance, and good chemical stability, ceramic materials are listed as the three major solid materials today along with metal materials and polymer materials. However, due to the characteristics of extremely high hardness and high brittleness, ceramic materials have problems such as high cost and low processing efficiency in machining; thus, the traditional molding process greatly limits the application and development of ceramic products with complex structures. [0003] In recent years, the rapid prototyping process based on ceramic products has become a research hotspot due to the advantages of no mold, short manufacturing cycle, and low cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/462C04B35/622C04B35/63C04B35/634C04B35/638C04B35/64B33Y70/10B33Y10/00
CPCC04B35/462C04B35/10C04B35/622C04B35/638C04B35/64C04B35/63472C04B35/6303B33Y70/10B33Y10/00C04B2235/3217C04B2235/3232C04B2235/6026C04B2235/6562C04B2235/6567C04B2235/658C04B2235/6581C04B2235/77C04B2235/96
Inventor 黎兆早余恺为吴明洋
Owner 原粒威(深圳)科技有限公司
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