A kind of preparation method of tooth-shaped special-shaped ceramics

Abstract

The invention relates to the technical field of ceramic preparation, in particular to a preparation method of tooth-like special-shaped ceramics. Slurry is applicable to a photo-curing forming method to prepare tooth-like ceramic bodies by optimizing the composition and proportioning of the slurry, the forming efficiency is high, ceramic particles in the bodies can be also dispersed evenly, and the shape and size accuracy of the bodies is high; the bodies cannot deform and crack in the producing process by controlling process parameters in degreasing and sintering steps, the sintered compactness is higher, tooth-like ceramic products are more uniform in structure, higher in accuracy and better in surface smoothness, the thickness of the tooth-like ceramic products can be greater than 8 mm, and accordingly the reliability of the ceramic products is improved.

Description

technical field

[0001] The invention relates to the technical field of ceramic preparation, in particular to a method for preparing tooth-shaped special-shaped ceramics. Background technique

[0002] Multi-tooth oxide ceramic components are widely used in the fields of machinery, chemical industry and automobile, such as zirconia or alumina ceramic gears and ceramic spirals. The current molding methods for manufacturing such multi-tooth oxide ceramic parts include cold isostatic pressing, dry pressing, slip casting and hot die casting. Although the dry pressing method has high efficiency, there are problems of density difference and uneven microstructure of the formed products, and it is not easy to form complex shapes and special-shaped products; the cold isostatic pressing method can obtain high-density and high-uniformity molding However, it is still difficult to form ceramic parts with complex shapes, and the forming efficiency is low and manual operations are many. Al...

Examples

Embodiment 1

[0036] This embodiment provides a preparation method of tooth-shaped special-shaped ceramics, the specific steps are as follows:

[0037] (1) Preparation of slurry

[0038] Preparation of premix: Weigh 650g of deionized water and 100g of glycerin as solvent; respectively weigh 234.3g of acrylamide and 15.6g of N–N’methylenebisacrylamide as organic solute. Mix the organic solute and the solvent evenly to dissolve all the organic solute to obtain 1000 g of a slightly yellowish transparent premixed solution.

[0039]Take the above premixed solution, and weigh 3g ammonium polyacrylate, 1000g α-alumina (ceramic powder, with bimodal distribution structure; 0.1μm≤particle size≤0.5μm, purity 99.99%), 1g 2-hydroxy- 2-methyl-1-phenyl-1-propanone (photoinitiator 1173), 12 g stearic acid (surface modifier).

[0040] Preparation of ceramic powder dispersion: put the ceramic powder, ethanol, and part of the dispersant in a planetary ball mill for 6 hours to form a ceramic powder dispersio...

Embodiment 2

[0053] This embodiment provides a preparation method of tooth-shaped special-shaped ceramics, the specific steps are as follows:

[0054] (1) Preparation of slurry

[0055] Preparation of premix: Weigh 760g of deionized water and 140g of glycerin as solvent; respectively weigh 290g of acrylamide and 10g of N–N’methylenebisacrylamide as organic solute. Mix the organic solute and the solvent evenly to dissolve all the organic solute to obtain 1200 g of a slightly yellowish transparent premixed solution.

[0056] Take the above premixed solution, and weigh 14.4g PVP, 1800g α-alumina (ceramic powder, with bimodal distribution structure; 0.1μm≤particle size≤0.5μm, purity 99.99%), 12g 2-hydroxy-2- Methyl-1-phenyl-1-propanone (photoinitiator 1173), 18 g stearic acid (surface modifier).

[0057] Preparation of ceramic powder dispersion: put the ceramic powder, ethanol, and part of the dispersant in a planetary ball mill for 3 hours to form a ceramic powder dispersion. The ball mill...

Embodiment 3

[0070] This embodiment provides a method for preparing tooth-shaped special-shaped ceramics. The specific steps are basically the same as those in Example 1. The difference is that the parameters set by the light-curing molding equipment in the molding step are different. The details are as follows: set the parameters of the light-curing molding equipment The scanning speed is 800mm / s, the scanning distance is 0.2mm, and the scanning method is XYSTA.

[0071] Density of the tooth-shaped special-shaped ceramics prepared in this embodiment is 3.91g / cm 3 , Vickers hardness is 17.7GPa. The structure and size of the tooth-shaped special-shaped ceramics prepared in this embodiment are basically consistent with the target structure, the shrinkage is small, and the deformation is small and negligible. The shape of the teeth on the rim is intact, and the shape and size of the finished product are high.

technical field

[0001] The invention relates to the technical field of ceramic preparation, in particular to a method for preparing tooth-shaped special-shaped ceramics. Background technique

[0002] Multi-tooth oxide ceramic components are widely used in the fields of machinery, chemical industry and automobile, such as zirconia or alumina ceramic gears and ceramic spirals. The current molding methods for manufacturing such multi-tooth oxide ceramic parts include cold isostatic pressing, dry pressing, slip casting and hot die casting. Although the dry pressing method has high efficiency, there are problems of density difference and uneven microstructure of the formed products, and it is not easy to form complex shapes and special-shaped products; the cold isostatic pressing method can obtain high-density and high-uniformity molding However, it is still difficult to form ceramic parts with complex shapes, and the forming efficiency is low and manual operations are many. Al...

Examples

Embodiment 1

[0036] This embodiment provides a preparation method of tooth-shaped special-shaped ceramics, the specific steps are as follows:

[0037] (1) Preparation of slurry

[0038] Preparation of premix: Weigh 650g of deionized water and 100g of glycerin as solvent; respectively weigh 234.3g of acrylamide and 15.6g of N–N’methylenebisacrylamide as organic solute. Mix the organic solute and the solvent evenly to dissolve all the organic solute to obtain 1000 g of a slightly yellowish transparent premixed solution.

[0039]Take the above premixed solution, and weigh 3g ammonium polyacrylate, 1000g α-alumina (ceramic powder, with bimodal distribution structure; 0.1μm≤particle size≤0.5μm, purity 99.99%), 1g 2-hydroxy- 2-methyl-1-phenyl-1-propanone (photoinitiator 1173), 12 g stearic acid (surface modifier).

[0040] Preparation of ceramic powder dispersion: put the ceramic powder, ethanol, and part of the dispersant in a planetary ball mill for 6 hours to form a ceramic powder dispersio...

Embodiment 2

[0053] This embodiment provides a preparation method of tooth-shaped special-shaped ceramics, the specific steps are as follows:

[0054] (1) Preparation of slurry

[0055] Preparation of premix: Weigh 760g of deionized water and 140g of glycerin as solvent; respectively weigh 290g of acrylamide and 10g of N–N’methylenebisacrylamide as organic solute. Mix the organic solute and the solvent evenly to dissolve all the organic solute to obtain 1200 g of a slightly yellowish transparent premixed solution.

[0056] Take the above premixed solution, and weigh 14.4g PVP, 1800g α-alumina (ceramic powder, with bimodal distribution structure; 0.1μm≤particle size≤0.5μm, purity 99.99%), 12g 2-hydroxy-2- Methyl-1-phenyl-1-propanone (photoinitiator 1173), 18 g stearic acid (surface modifier).

[0057] Preparation of ceramic powder dispersion: put the ceramic powder, ethanol, and part of the dispersant in a planetary ball mill for 3 hours to form a ceramic powder dispersion. The ball mill...

Embodiment 3

[0070] This embodiment provides a method for preparing tooth-shaped special-shaped ceramics. The specific steps are basically the same as those in Example 1. The difference is that the parameters set by the light-curing molding equipment in the molding step are different. The details are as follows: set the parameters of the light-curing molding equipment The scanning speed is 800mm / s, the scanning distance is 0.2mm, and the scanning method is XYSTA.

[0071] Density of the tooth-shaped special-shaped ceramics prepared in this embodiment is 3.91g / cm 3 , Vickers hardness is 17.7GPa. The structure and size of the tooth-shaped special-shaped ceramics prepared in this embodiment are basically consistent with the target structure, the shrinkage is small, and the deformation is small and negligible. The shape of the teeth on the rim is intact, and the shape and size of the finished product are high.

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