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Ceramic material for photocuring forming as well as emulsion coating preparation method and application of ceramic material

A ceramic material and light-curing technology, which is applied in the field of ceramic materials, can solve the problems of low curing thickness of a single layer of ceramic slurry, influence on the performance of final formed ceramics, and large difference in refractive index of photosensitive resins, etc., so as to achieve short preparation cycle and reduce Absorption or scattering, small effect

Active Publication Date: 2020-06-30
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, some ceramic powders (such as silicon nitride, titanium dioxide, etc.) have low single-layer curing thickness of ceramic slurry due to their own physical properties such as high absorption rate of ultraviolet light, strong scattering, and large difference in refractive index with photosensitive resin. , it is difficult to form by light curing forming method
By oxidizing the non-oxide ceramic powder to generate corresponding oxides on the surface of the ceramic powder, the single-layer solidified thickness of the ceramic slurry can be significantly increased, but it will affect the performance of the final shaped ceramic, and the thickness of the coating layer is difficult to control. The adsorption or chemical reaction of coupling agent, surfactant, etc. on the surface of ceramic powder coats the surface of ceramic powder or uses other organic methods, which have little effect on the ultraviolet absorption and refractive index of ceramic powder. Single layer curing thickness is still low

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  • Ceramic material for photocuring forming as well as emulsion coating preparation method and application of ceramic material

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preparation example Construction

[0028] Specifically, the method for preparing the emulsion coating of the ceramic material for photocuring molding mainly includes the following steps:

[0029] Step 1: Mix the photosensitive resin, emulsifier and deionized water into a completely dispersed coating precursor emulsion, then add ceramic powder into the coating precursor emulsion, and make the ceramic powder uniformly dispersed in the coating precursor emulsion.

[0030] Specifically, the photosensitive resin, emulsifier and deionized water are mixed into a completely dispersed coating precursor emulsion by a mixing and stirring method, and then the ceramic powder is added to the coating precursor emulsion and stirring is continued.

[0031] In this embodiment, the mixing and stirring method includes one or both of magnetic stirring and mechanical stirring; wherein, the rotational speed used for the magnetic stirring is 500-3000 rpm; the rotational speed used for the mechanical stirring is 300-2000 rpm; The phot...

Embodiment 1

[0040] The preparation method for the emulsion coating of the ceramic material for photocuring and forming provided by the embodiment 1 of the present invention mainly includes the following steps:

[0041] (1) The magnetic stirrer stirs and mixes hydroxyethyl methacrylate, deionized water and alkylphenol polyoxyethylene ether at a rotating speed of 500rpm to form a hydroxyethyl methacrylate-deionized water emulsified solution, and then the silicon nitride ceramic The powder is added to the hydroxyethyl methacrylate-deionized water emulsified solution.

[0042] Wherein, the concentration of the hydroxyethyl methacrylate in the hydroxyethyl methacrylate-deionized water emulsified solution is 1 g / L; the alkane in the hydroxyethyl methacrylate-deionized water emulsified solution The concentration of phenol polyoxyethylene ether is 1 g / L; the particle size of the silicon nitride ceramic powder is 0.1 μm, and the silicon nitride ceramic powder is emulsified with the hydroxyethyl me...

Embodiment 2

[0046] The preparation method for the emulsion coating of the ceramic material for photocuring and forming provided by the embodiment 2 of the present invention mainly includes the following steps:

[0047] (1) Trimethylolpropane triacrylate, deionized water and alkylphenol polyoxyethylene ether are stirred and mixed into a trimethylolpropane triacrylate-deionized water emulsified solution with a magnetic stirrer at a rotating speed of 3000 rpm, and then the Silicon carbide ceramic powder is added to the trimethylolpropane triacrylate-deionized water emulsified solution.

[0048] Wherein, the concentration of the trimethylolpropane triacrylate in the trimethylolpropane triacrylate-deionized water emulsified solution is 5 g / L; the trimethylolpropane triacrylate-deionized water The concentration of the alkylphenol polyoxyethylene ether in the emulsified solution is 2g / L; the particle size of the silicon nitride ceramic powder is 100 μm, and the silicon nitride ceramic powder and...

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Abstract

The invention belongs to the related technical field of ceramic materials. The invention discloses a ceramic material for photocuring forming as well as an emulsion coating preparation method and application of the ceramic material. The method comprises the following steps: (1) mixing a photosensitive resin, an emulsifier and deionized water to form a completely dispersed coating precursor emulsion, adding ceramic powder into the coating precursor emulsion, and uniformly dispersing the ceramic powder into the coating precursor emulsion; and (2) adding a photoinitiator into a mixture obtained in the step (1), irradiating with ultraviolet light, carrying out a cross-linking reaction on the photosensitive resin under the irradiation of the ultraviolet light to form a gel on the surface of theceramic powder, and uniformly coating the ceramic powder with the gel to obtain the ceramic material. The method is environmentally friendly, low in cost, high in universality, simple in process, short in preparation period and capable of effectively solving the photocuring manufacturing problem of ceramic parts such as silicon nitride and titanium dioxide.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and more particularly, relates to a ceramic material used for photocuring and forming, and a preparation method and application of the emulsion coating thereof. Background technique [0002] Advanced structural ceramic parts are widely used in national defense, energy, aerospace, machinery, petrochemical, metallurgy, electronics and other fields due to their unique and excellent properties such as high strength, high hardness, wear resistance, corrosion resistance and low thermal conductivity. At present, the traditional manufacturing method is to shape the ceramic powder or slurry through a mold, and then go through post-processing such as sintering and machining to obtain the desired ceramic parts. Complex parts seriously limit the application and development of advanced ceramics. [0003] The additive manufacturing method can directly form parts of the required shape without a mold,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/584C04B35/565C04B35/46C04B35/622C04B35/634C08F20/20C08F22/20C08F2/48
CPCC04B35/46C04B35/565C04B35/584C04B35/622C04B35/63448C08F2/48C08F20/20
Inventor 吴甲民李萌陈双程立金陆路史玉升李晨辉
Owner HUAZHONG UNIV OF SCI & TECH
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