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A kind of preparation method and solid method of ceramic slurry

A technology of ceramic slurry and ceramic powder, which is applied in the field of ceramics, can solve the problems of unfavorable manufacturing of ceramic electronic devices, complex photocuring process engineering, easy cracks or deformation, etc., so as to accelerate the photocuring molding process and shorten the surface solidification time , enhance the effect of quality

Active Publication Date: 2022-03-18
原粒威(深圳)科技有限公司
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  • Summary
  • 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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  • A kind of preparation method and solid method of ceramic slurry

Examples

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 solidification method of ceramic slurry. The method includes the following steps: mixing and ball-milling the oxides, adding photosensitive resin and additives, stirring and mixing, adding ceramic powder, stirring and homogenizing, and obtaining ceramic slurry with a solid content greater than 50%. And using a light-curing 3D printer, the ceramic slurry is applied to the preparation of ceramic products with high precision and excellent surface quality. Beneficial effects: By optimizing the composition and proportion of the ceramic slurry, the surface can be quickly solidified without increasing the intensity of ultraviolet exposure, and the photocuring 3D printing of high solid phase materials can be realized. In the degreasing process, the UV re-curing process is introduced to achieve the shape-conserving degreasing effect and avoid the collapse and cracks caused by the stress change of the ceramic green body in the traditional degreasing process. In the degreasing process, photocatalytic degreasing technology is introduced to further complete the decomposition of organic matter, realize complete degreasing and reduce degreasing time. Realize the technical level that the solid phase content of ceramic green body exceeds 90%.

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 Patents(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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