Ceramic material for photocuring and its emulsion coating preparation method and application

A ceramic material and photocuring technology, which is applied in the field of ceramic materials, can solve the problems of affecting the performance of the final formed ceramics, the low thickness of a single layer of ceramic slurry cured, and the large difference in the refractive index of photosensitive resins, achieving short preparation cycles and reduced Absorb or scatter, increase the effect of curing depth

Active Publication Date: 2021-11-19
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 and its emulsion coating preparation method and application

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preparation example Construction

[0028] Specifically, the described preparation method for emulsion coating of ceramic materials for photocuring and forming mainly includes the following steps:

[0029] Step 1, mix the photosensitive resin, emulsifier and deionized water into a fully dispersed coating precursor emulsion, then add the 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 fully dispersed coating precursor emulsion by a mixing and stirring method, and then ceramic powder is added into the coating precursor emulsion and the stirring is continued.

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

Embodiment 1

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

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

[0042] Wherein, the concentration of the hydroxyethyl methacrylate in the hydroxyethyl methacrylate-deionized water emulsified solution is 1g / L; The concentration of phenol polyoxyethylene ether is 1g / 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 methacrylate-deionized water The concentration of the silicon nitride ceramic powder in the mixture formed b...

Embodiment 2

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

[0047] (1) A magnetic stirrer stirs and mixes trimethylolpropane triacrylate, deionized water and alkylphenol polyoxyethylene ether with a rotating speed of 3000rpm to form a trimethylolpropane triacrylate-deionized water emulsified solution, and then The silicon carbide ceramic powder is added into the trimethylolpropane triacrylate-deionized water emulsified solution.

[0048] Wherein, the concentration of the trimethylolpropane triacrylate in the trimethylolpropane triacrylate-deionized water emulsified solution is 5g / 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 the trimethylol...

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Abstract

The invention belongs to the related technical field of ceramic materials, and discloses a preparation method and application of a ceramic material for photocuring forming and its emulsion coating. The method includes the following steps: (1) mixing photosensitive resin, emulsifier and Ionized water is mixed into a fully dispersed coating precursor emulsion, and then ceramic powder is added to the coating precursor emulsion, and the ceramic powder is evenly dispersed in the coating precursor emulsion (2) Add the photoinitiator to the mixture obtained in step (1), and irradiate with ultraviolet light, and the photosensitive resin undergoes a crosslinking reaction under the irradiation of ultraviolet light, so that the ceramic A gel is formed on the surface of the powder, and the gel uniformly covers the ceramic powder, thereby obtaining the ceramic material. The invention is environmentally friendly, low in cost, strong in universal applicability, simple in process and short in preparation period, and can effectively solve the problem of photocuring manufacturing of ceramic parts such as silicon nitride and titanium dioxide.

Description

technical field [0001] The invention belongs to the technical field related to ceramic materials, and more specifically relates to a ceramic material for photocuring and its emulsion coating preparation method and application. 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 form ceramic powder or slurry through a mold, and then undergo post-processing such as sintering and machining to obtain the required ceramic parts. This mold forming process makes the processing cost of parts higher and it is difficult to prepare structures. Complex parts severely limit the application and development of advanced ceramics. [0003] The additive man...

Claims

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Application Information

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Patent Type & Authority Patents(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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