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Method for preparing ceramic microbeads, ceramic microbeads and application thereof

A ceramic microbead and microbead technology, which is applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high non-roundness of microbeads, difficult to disperse into balls, and low non-roundness, and achieve non-roundness. The effect of low degree, high density and low oil phase loss

Inactive Publication Date: 2020-05-26
LUOYANG ZHONGCHAO NEW MATERIAL SHARES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the difficulty of dispersing into balls in the preparation process existing in the prior art, the formed micro-bead green body has high out-of-roundness and low hardness, and the surface of the micro-bead green body adheres to oily substances, which not only causes waste of oil, It is not conducive to the problem of sintering. A method for preparing ceramic microspheres and ceramic microspheres and their applications are provided to achieve smooth and clean surfaces of the prepared ceramic microspheres, low out-of-roundness, high density, high strength, and wear resistance. good purpose

Method used

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  • Method for preparing ceramic microbeads, ceramic microbeads and application thereof
  • Method for preparing ceramic microbeads, ceramic microbeads and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0082] (1) Prepare 100g premix solution, wherein the weight content of each component is: 10% of acrylamide, 0.4% of N,N-methylenebisacrylamide, 0.12% of sodium alginate (the number average molecular weight is 100000), and the balance for water;

[0083] 315.4g of α-alumina (α-Al 2 o 3 , the average particle size is 1 μm, and the purity is 99.95%), 1.9g of magnesite (magnesia content is 42% by weight) and 1.6g of ammonium citrate are added in the premixed liquid, and in a ball mill, at 2000rpm, quickly ball mill 5min to obtain a suspension; wherein the volume of α-alumina accounts for 45% of the sum of the volume of α-alumina and the volume of the premixed solution;

[0084] Then add an aqueous solution of ammonium persulfate with a mass concentration of 10% into the suspension, stir evenly, and then vacuum defoam at 0.001 MPa and a rotating speed of 70 rpm for 10 minutes to obtain a slurry. The amount of ammonium persulfate added is 0.017% of the total mass of the slurry ....

Embodiment 2

[0090] (1) Prepare 100g premix solution, wherein the weight content of each component is: 12% of acrylamide, 0.25% of N,N-methylenebisacrylamide, 0.16% of sodium alginate (number average molecular weight is 50000), and the balance for water;

[0091] 323.6g of α-alumina (average particle size of 1 μm, purity of 99.95% by weight), 76g of zirconia (ZrO 2 (3Y), the average particle size is 0.8 μm, and the purity is 99.5% by weight), 0.4 g of La 2 o 3 And the ammonium polyacrylate of 4g is added in the premixed liquid, in ball mill, under 1500rpm, quick ball mill 15min, obtain suspension; Wherein, α-alumina and zirconium dioxide (ZrO 2 The total volume of (3Y) accounts for the volume of α-alumina, zirconia (ZrO2 50% of the sum of the volume of (3Y) and the volume of premix solution;

[0092] Then add ammonium persulfate solution with a mass concentration of 10% into the suspension, stir evenly, then add antifoaming agent methyl silicone oil and stir, remove foam, and obtain slu...

Embodiment 3

[0098] (1) Prepare 100g of premix solution, wherein the weight content of each component is: 15% of acrylamide, 0.6% of N,N-methylenebisacrylamide, 0.22% of sodium alginate, and the balance is water;

[0099] Add 456 zirconium silicate (average particle size of 0.9 μm, purity of 99.5%) and 5 g of sodium polyacrylate into the premix, and quickly ball mill for 3 minutes at 1500 rpm in a ball mill to obtain a suspension; among them, silicic acid The volume of zirconium accounts for 50% of the sum of the volume of zirconium silicate and the volume of premixed solution;

[0100] Add the ammonium persulfate solution with a mass concentration of 10% into the suspension, then add the defoamer n-octanol, stir evenly, and then vacuum defoam at 0.003 MPa and 50 rpm for 5 minutes to obtain a slurry. The amount of ammonium persulfate added It is 0.026% of the total mass of the slurry.

[0101] (2) Add the above-mentioned slurry to the titrator, make it dispersed into droplets with a diame...

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Abstract

The invention relates to the field of ceramics, and discloses a method for preparing ceramic microbeads. The method comprises the following steps: slurry containing an organic monomer, a cross-linkingagent, water-soluble alginate, ceramic powder, a sintering aid, an initiator and a dispersing agent is prepared, and the organic monomer, the cross-linking agent, the water-soluble alginate, the initiator and the dispersing agent are dissolved in the slurry, wherein the number-average molecular weight of the water-soluble alginate is not lower than 4000; the slurry prepared in the step (1) is fedinto an oil phase containing a catalyst in the form of liquid drops, and primary gel casting is carried out to obtain cured microspheres; the cured microbeads obtained in the step (2) are fed into anaqueous solution of a calcium source, and secondary gel casting is carried out to obtain hardened microbeads; and the hardened microbeads obtained in the step (3) are sintered. The ceramic microbeadprepared by the method has the advantages of high density, high strength, high wear resistance, low surface roughness, low out-of-roundness and low oil phase loss.

Description

technical field [0001] The invention relates to the field of preparing ceramic microbeads green bodies, in particular to a method for preparing ceramic microbeads, ceramic microbeads and applications thereof. Background technique [0002] With the rapid development of material science, there are more and more places that require high-purity ultra-fine powder, and the demand for grinding media for producing ultra-fine powder-solid and dense ceramic beads is increasing. Many ultra-fine materials, such as coatings , ink, dyes, ceramic powder, electronic materials, magnetic materials, cosmetics, etc. need to use grinding beads for ultra-fine grinding, so higher requirements are put forward for the wear resistance and size of grinding beads. The traditional methods for preparing ceramic balls include molding method, granulation-rolling method, extrusion-rolling method, melting method, sol-gel method, etc. In terms of beads, these traditional methods are still difficult to achiev...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/16C04B35/478C04B35/48C04B35/565C04B35/581C04B35/584C04B35/622C04B35/64C04B35/632C04B35/636C09K3/14
CPCC04B35/10C04B35/16C04B35/478C04B35/48C04B35/565C04B35/581C04B35/584C04B35/622C04B35/632C04B35/636C04B35/64C04B2235/5436C04B2235/5445C04B2235/6022C09K3/1436
Inventor 陈成裴广斌李岱李敏高强
Owner LUOYANG ZHONGCHAO NEW MATERIAL SHARES CO LTD
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