Preparation method of porous ceramic material rapidly formed based on photocuring

A technology of light-curing molding and porous ceramics, applied in the direction of additive processing, etc., can solve problems such as shape and structure optimization, application limitations, etc., and achieve the effect of high porosity

Inactive Publication Date: 2017-08-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the preparation of porous ceramic materials mostly adopts mold molding, which can only pr

Method used

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  • Preparation method of porous ceramic material rapidly formed based on photocuring
  • Preparation method of porous ceramic material rapidly formed based on photocuring

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preparation example Construction

[0029] see figure 1 , a method for preparing a porous ceramic material based on light-curing rapid prototyping provided by the present invention, which specifically includes the following steps:

[0030] 1) The photocurable resin prepolymer, reactive diluent and surface modifier are mechanically mixed to obtain a premixed liquid; the photocurable resin prepolymer, reactive diluent and surface modifier are respectively by weight :

[0031] Photocurable resin prepolymer: 0-100 parts

[0032] Active diluent: 1-40 parts

[0033] Surface modifier: 1-15 parts;

[0034] The photocurable resin prepolymer is selected from any one of epoxy resin and acrylic resin and a mixture of the two. The surface modifier is selected from any one or more mixtures of surfactants, coupling agents, unsaturated organic acids, and organic oligomers; the reactive diluent is an acrylate monomer; the acrylate Monomers are 1,6-ethylene glycol diacrylate, isobornyl acrylate, propoxylated neopentyl glycol...

Embodiment 1

[0041]First, 100 parts of 1,6-ethylene glycol diacrylate and propoxylated neopentyl glycol diacrylate are mixed in a mass ratio of 1:1, and 1 part of sodium dodecylbenzenesulfonate is fully mixed to obtain a pre- Mixed liquid; mix starch and alumina ceramic powder at the same time to obtain porous ceramic powder, wherein starch accounts for 1vol% of the porous ceramic powder; mix porous ceramic powder into the premixed liquid, and ball mill to obtain primary slurry, wherein the powder The addition amount is 40vol% of the primary slurry; Add the initiator 1-hydroxycyclohexyl phenyl ketone of premixed liquid quality 0.1wt% to obtain light-cured porous ceramic slurry; Put the prepared light-cured porous ceramic slurry into light In the curing molding equipment, the light-curing molding green body is obtained through light-curing 3D printing; the green body is heated to 550°C for 3 hours for degreasing, and heated to 1600°C for 2 hours for sintering. Alumina ceramic parts with uni...

Embodiment 2

[0043] Firstly, three different porous ceramic slurries were prepared for subsequent printing of parts with gradient pore microstructure.

[0044] Material 1: First, 100 parts of epoxy acrylic resin, such as dicyclopentadiene phenol type epoxy resin, 50 parts of 1,6-ethylene glycol diacrylate, and 5 parts of sodium dodecylbenzenesulfonate are fully mixed to obtain a pre- mixed liquid; at the same time, carbon powder and calcium phosphate ceramic powder are mixed to obtain porous ceramic powder, wherein carbon powder accounts for 30vol% of the porous ceramic powder; the porous ceramic powder is mixed into the premixed liquid, and ball milled to obtain primary slurry, wherein The powder is added in an amount of 70vol% of the primary slurry; a cationic initiator bis-2,6-difluoro-3-pyrrolephenylferrocene is added in an amount of 0.2wt% of the premix to obtain a light-cured porous ceramic slurry.

[0045] Material 2: First, 100 parts of 1,6-ethylene glycol diacrylate and 10 parts o...

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Abstract

Provided is a preparation method of a porous ceramic material rapidly formed based on photocuring. The preparation method comprises the steps that firstly, a photo-cured resin prepolymer, an active diluent and a surface modifier are evenly mixed to obtain a premixed solution, ceramic powder and a pore-forming agent are mixed to obtain porous ceramic powder, then the porous ceramic powder is mixed in the premixed solution to obtain primary slurry, and then a photoinitiator is added to prepare a photocured porous ceramic slurry; the ceramic slurry is put in a photocuring forming device to prepare a photocuring forming blank; finally the blank is degreased and sintered to obtain the porous ceramic material. By designing and optimizing the components and proportion of the photocured porous ceramic slurry and using a photocuring 3D printing device, the limitations of traditional mold processing to shapes are overcome. The micropores formed by adopting the pore-forming agent and macropores for 3D printing are combined, and the high-porosity foam ceramic material can be prepared. In addition, the macropores are controllable in shape and distribution, and gradient porous ceramic material can be prepared.

Description

technical field [0001] The invention relates to the technical field of ceramic material preparation, in particular to a porous ceramic material based on photocuring rapid prototyping and a preparation method thereof. Background technique [0002] Light-curing rapid prototyping technology is one of the methods with the highest molding precision in additive manufacturing technology. The light-curing rapid prototyping technology uses photosensitive resin as a raw material, and the material changes from liquid to solid under the irradiation of a light source of a corresponding wavelength to realize part molding. This method has high precision and strong process flexibility. [0003] Light-curing rapid prototyping of ceramic materials is a new process for forming complex ceramic parts in the past two years. It has the characteristics of high precision, fast speed, high material compatibility, and the ability to form large-sized ceramic parts. It uses photosensitive resin as a bin...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/634C04B35/638C04B38/06B33Y70/00
CPCB33Y70/00C04B35/622C04B35/634C04B35/638C04B38/06C04B2235/6026
Inventor 吕志刚胡可辉李培杰
Owner TSINGHUA UNIV
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