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Method for preparing yttrium oxide transparent wave-permeable thin-wall ceramic pipe

A technology of yttrium oxide and ceramic tubes, which is applied in the field of preparing yttrium oxide transparent wave-transmitting thin-walled ceramic tubes, can solve the problems of mass production of unsuitable shapes, poor uniformity of microstructure of products, low solid content of slurry, etc. Superior performance, good light and wave transmittance, uniform composition and density

Inactive Publication Date: 2010-03-10
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Yttrium oxide is a transparent, wave-transparent, high-temperature-resistant ceramic material, which is generally formed by grouting, dry pressing, or injection molding. The shape and size of the product produced by the above-mentioned forming method are subject to certain restrictions. Such as: using grouting and dry pressing, due to the low strength of the green body, it is suitable for forming products with simple shapes and small volumes, and there is a density gradient inside the green body, and the uniformity of the microstructure of the product is poor; although injection molding can be used to prepare Ceramic products with complex shapes, but in this process, organic matter is used as solvent, which is not only costly, but also causes serious pollution to the environment. In the process, the solid content of the slurry is low, the degreasing process is extremely complicated, and the product shrinks when fired. Large, low yield, not suitable for mass production of products with complex shapes and large sizes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The composition of the yttrium oxide composite powder is: 100wt% of yttrium oxide powder with a particle size of 60nm, the composition of the organic solution is: 5wt% of organic monomer, 95wt% of distilled water, wherein the organic monomer is N, N-methylene acrylamide 2wt% mixed with 98wt% acrylamide; the dispersant uses ammonium polyacrylate solution with a concentration of 30wt%; the pH adjuster uses 40wt% ammonia water, and the pH value is controlled within the range of 9-11; the initiator uses a concentration of 4wt % ammonium persulfate solution.

[0016] Preparation: Mix the above-mentioned organic solution, dispersant, and pH adjuster in a ratio of 89:10:1 by weight to make a mixed organic solution, and then mix the yttrium oxide composite powder with the mixed organic solution in a ratio of 80:20 by weight Grinding with ball stones to make a uniformly suspended yttrium oxide composite ceramic slurry, vacuum treatment until the vacuum degree reaches -0.1MPa, an...

Embodiment 2

[0018] The composition of the yttrium oxide composite powder is: the yttrium oxide powder with a particle size of 60nm and the thorium oxide additive are mixed at a ratio of 90:10; the composition of the organic solution is 5wt% of organic monomers and 95wt% of distilled water, wherein the organic monomers The composition and ratio are N, N-methylene acrylamide 2wt%, acrylamide 98wt%; the dispersant uses ammonium polyacrylate solution, the concentration is 30wt%; In the range of -11; the initiator adopts the ammonium persulfate solution whose concentration is 4wt%.

[0019] Preparation: Mix the above-mentioned organic solution, dispersant, and pH adjuster in a ratio of 89:10:1 by weight to make a mixed organic solution, and then mix the yttrium oxide composite powder with the mixed organic solution in a ratio of 80:20 by weight Grinding with ball stones to make a uniformly suspended yttrium oxide composite ceramic slurry, vacuum treatment until the vacuum degree reaches -0.1MP...

Embodiment 3

[0021] The composition of the yttrium oxide composite powder is: 90wt% of yttrium oxide with a particle size of 500nm, 10wt% of lanthanum oxide additive; the composition of the organic solution is: 5wt% of organic monomers, 95wt% of distilled water, wherein the composition of organic monomers is N, N - Methylene acrylamide 5wt%, acrylamide 95wt%; the dispersant uses ammonium polyacrylate solution with a concentration of 30wt%, and the concentration is 30wt%; the ph value adjuster uses 40wt% ammonia water, and the ph value is controlled in the range of 9-11 Inside; the initiator uses ammonium persulfate solution with a concentration of 1 wt%.

[0022] Preparation: Mix the above-mentioned organic solution, dispersant, and pH adjuster in a ratio of 89:10:1 by weight to make a mixed organic solution, and then mix the yttrium oxide composite powder with the mixed organic solution in a ratio of 80:20 by weight Grinding with ball stones to make a uniformly suspended yttrium oxide com...

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Abstract

The invention provides a method for manufacturing the yttria ceramic tubes with a thin wall which are transparent and wave-transparent, the processes show as follow: Synthesizing the yttria ceramic slurry, vacuumizing, forming, demoulding, drying and sintering. The composition and weight ratio of yttria ceramic slurry shows as follow: Composited yttria ceramic powders 30-90wt%, organic solvents 9.5-45wt%, dispersants 0-15wt%, PH adjustment agent 0-5wt%, initiator 0.5-5wt%, and catalyst 0-5wt%. Inject the vacuumized yttria ceramic slurry into the centrifugal molding equipment to solidify it forforming.

Description

technical field [0001] The invention relates to a method for preparing a transparent wave-transmitting thin-walled ceramic tube of yttrium oxide, which belongs to the technical field of special ceramic preparation technology. Background technique [0002] Yttrium oxide is a transparent, wave-transparent, high-temperature-resistant ceramic material, which is generally formed by grouting, dry pressing, or injection molding. The shape and size of the product produced by the above-mentioned forming method are subject to certain restrictions. Such as: using grouting and dry pressing, due to the low strength of the green body, it is suitable for forming products with simple shapes and small volumes, and there is a density gradient inside the green body, and the uniformity of the microstructure of the product is poor; although injection molding can be used to prepare Ceramic products with complex shapes, but in this process, organic matter is used as solvent, which is not only cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/622C04B33/28C03B32/02C03C10/02
Inventor 唐竹兴田贵山
Owner SHANDONG UNIV OF TECH
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