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Process for preparing transparent ceramic through 3D printing

A transparent ceramic and 3D printing technology, applied in the field of 3D printing, can solve the problems of poor product quality stability, high elongation at break, and fragility, and achieve the goals of improving quality stability, moderate elongation at break, and good antibacterial function Effect

Inactive Publication Date: 2020-04-03
嘉兴饶稷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 1. The process is complicated, the conditions are harsh, the molding speed is limited, and the dimensional accuracy is low when molding products with complex shapes;
[0013] 2. The quality of the products obtained by the 3D printing process is relatively poor, and defective products are prone to appear;
[0014] 3. The yield strength of products obtained by 3D printing process is low, the elongation at break is large or fragile, and the service life is short;
[0015] 4. The product obtained by the 3D printing process has poor transparency, is not wear-resistant, has poor user experience, and has a short service life, so it cannot be used as a crown material

Method used

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  • Process for preparing transparent ceramic through 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A process for preparing transparent ceramics by 3D printing, comprising the following steps:

[0068] A. After mixing zirconia, ethylene-vinyl acetate copolymer, hexanediol diacrylate, carboxyl silica microspheres, nano-titanium dioxide, alumina fibers and edge graphene oxide, in ethanol solution dissolved with dispersant Perform ball milling for 1 to 2 hours to obtain ball milled slurry;

[0069] B. Add a photoinitiator to the ball mill slurry and mix evenly; then adjust the solid content to 80-85% by adding ethanol or ethanol volatilization to obtain a 3D printing ceramic slurry;

[0070] C. Using a DLP printer with a wavelength of 390-420nm to print the 3D printing ceramic slurry and dry it to obtain transparent ceramics.

[0071] Preferably, in step B, the solid content is adjusted to 82.5% by adding ethanol or volatilizing the ethanol to obtain a 3D printing ceramic slurry.

[0072] Preferably, in step C, a DLP printer with a wavelength of 405 nm is used to print...

Embodiment 2

[0104] A process for preparing transparent ceramics by 3D printing, comprising the following steps:

[0105] A. After mixing zirconia, ethylene-vinyl acetate copolymer, hexanediol diacrylate, carboxyl silica microspheres, nano-titanium dioxide, alumina fibers and edge graphene oxide, in ethanol solution dissolved with dispersant Carry out ball milling 1h, obtain ball milling slurry;

[0106] B. Add a photoinitiator to the ball mill slurry and mix evenly; then adjust the solid content to 80% by adding ethanol or ethanol volatilization to obtain a 3D printing ceramic slurry;

[0107] C. Use a DLP printer with a wavelength of 390nm to print the 3D printing ceramic slurry and dry it to obtain transparent ceramics.

[0108] In this embodiment, in step C, a DLP printer with a wavelength of 390nm is used to print the 3D printing ceramic slurry to obtain a transparent ceramic semi-finished product; then immerse the transparent ceramic semi-finished product in absolute ethanol for 3 m...

Embodiment 3

[0127] A process for preparing transparent ceramics by 3D printing, comprising the following steps:

[0128] A. After mixing zirconia, ethylene-vinyl acetate copolymer, hexanediol diacrylate, carboxyl silica microspheres, nano-titanium dioxide, alumina fibers and edge graphene oxide, in ethanol solution dissolved with dispersant Carry out ball milling 2h, obtain ball milling slurry;

[0129] B. Add the photoinitiator to the ball mill slurry and mix evenly; then adjust the solid content to 85% by adding ethanol or ethanol volatilization to obtain 3D printing ceramic slurry;

[0130] C. Using a DLP printer with a wavelength of 420nm, the 3D printing ceramic slurry is printed and dried to obtain transparent ceramics.

[0131] In this embodiment, in step C, a DLP printer with a wavelength of 420nm is used to print the 3D printing ceramic slurry to obtain a transparent ceramic semi-finished product; then immerse the transparent ceramic semi-finished product in absolute ethanol for...

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Abstract

The invention discloses a process for preparing transparent ceramic through 3D printing, which comprises the following steps: A, mixing silicon nitride ceramic powder, silicon carbide fibers, ethoxylated trimethylolpropane triacrylate, aliphatic polyurethane diacrylate and tetra(3-mercaptopropionic acid) pentaerythritol ester, and performing ball milling in an ethanol solution in which a polymerization inhibitor, a dispersing agent and a defoaming agent are dissolved for 1-2h to obtain ball-milled slurry; B, adding a photoinitiator into the ball-milled slurry, mixing the photoinitiator and theball-milled slurry well, and adjusting the solid content to 78-85% to obtain 3D printing ceramic slurry; and C, printing the 3D printing ceramic slurry by adopting a DLP printer with the wavelength of 390-420nm, and carrying out drying to obtain the transparent ceramic. The process for preparing the transparent ceramic through 3D printing is high in forming speed, high in automation degree, capable of forming any complex shape and high in size precision, and the prepared transparent ceramic has excellent heat-conducting property and good mechanical property.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a process for preparing transparent ceramics by 3D printing. Background technique [0002] As one of the important development trends of ceramic 3D printing technology in the future, ceramic SLA (Stereo Lithography Appearance) 3D printing technology based on the principle of stereolithography has the advantages of high molding quality, large size range of prepared parts, and close to ideal density. [0003] SLA molding technology uses photosensitive resin as raw material, controls the laser through computer, and scans point by point on the surface of liquid photosensitive resin according to the layered section information of the air dimension CAD model of the part, and the thin layer of resin in the scanned area produces photopolymerization reaction And assimilation, forming l thin layers of parts. After the assimilation of the first layer is completed, the workbench is move...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F263/04C08F222/14C08K13/04C08K3/22C08K7/18C08K7/08C08K3/04B28B1/00C04B35/48C04B35/80B33Y10/00B33Y40/00B33Y70/10
CPCC08F263/04C08K13/04C08K3/22C08K7/18C08K7/08C08K3/042C04B35/48B28B1/001B33Y10/00B33Y40/00B33Y70/00C04B2235/425C04B2235/5224C04B2235/3418C04B2235/3232C08K2003/2241C08K2003/2244C08K2201/011
Inventor 赵喆姜焱林
Owner 嘉兴饶稷科技有限公司
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