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Preparation method of ceramic microbeads

A technology for ceramic microbeads and ceramic powders, which is applied in the field of ultrafine grinding media preparation, can solve the problems of high cost, large labor, not meeting environmental protection and other problems, and achieves the effects of good flexibility and easy burning out.

Active Publication Date: 2020-06-05
长裕控股集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The zirconia microbeads produced by the titration molding process have high sphericity and good wear resistance, but the process is complicated, and the yield and pass rate are greatly limited.
The titration molding process generally uses acrylamide as a monomer, which is highly toxic and does not meet the requirements of environmental protection; in addition, the titration molding is formed by dripping droplets into a high-viscosity oily medium, which makes it difficult to clean the green microbeads, and the production low efficiency
[0004] Spray molding and roll molding processes are simple and can produce ceramic microspheres in large quantities, but it is difficult to prepare high-quality ceramic microspheres
The ball billets produced by spray molding and roll molding have many pores, low green density, and many green defects, resulting in low compressive strength and wear resistance of fired ceramic microspheres. If the isostatic pressing process is used to improve Green body defects require the use of a large number of jacket molds, high cost, cumbersome process, and heavy labor

Method used

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  • Preparation method of ceramic microbeads
  • Preparation method of ceramic microbeads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Carrying out rolling molding of 3mol yttrium-stabilized zirconia powder to obtain a ceramic microball blank, wherein the yttrium oxide content in the 3mol yttrium-stabilized zirconia powder accounts for 3mol%, and the zirconia content accounts for 97mol%;

[0030] (2) Dip the roll-molded ceramic microbead blank into No. 80 microcrystalline paraffin and ethylene-vinyl acetate copolymer high-temperature mixed solution for coating, wherein No. 80 microcrystalline paraffin and ethylene-vinyl acetate copolymer In the mixed solution at high temperature, microcrystalline paraffin accounts for 92wt%, ethylene-vinyl acetate copolymer accounts for 8wt%, and the temperature of the mixed solution is 70°C;

[0031] (3) Take out the coated ceramic microsphere blank, and place it in a warm isostatic pressing device for isostatic pressing, wherein the temperature of the warm isostatic pressing device is set to 50° C. and the pressure is 150 MPa;

[0032] (4) After the isostatic pre...

Embodiment 2

[0037] (1) Spray molding 5 mol of cerium-stabilized zirconia powder to obtain a ceramic microball blank, wherein the content of cerium oxide in the 5 mol of cerium-stabilized zirconia powder accounts for 5 mol%, and the content of zirconia accounts for 95 mol%;

[0038] (2) Dip the spray-formed ceramic microbead blank into No. 80 microcrystalline paraffin and low-density polyethylene high-temperature mixed solution for coating, wherein the microcrystalline paraffin in No. 80 microcrystalline paraffin and low-density polyethylene high-temperature mixed solution Accounting for 85wt%, low-density polyethylene accounting for 15wt%, the temperature of the mixed solution is 80 ℃;

[0039] (3) Take out the coated ceramic microsphere blank, and place it in a warm isostatic pressing device for isostatic pressing, wherein the temperature of the warm isostatic pressing device is set to 60° C. and the pressure is 300 MPa;

[0040] (4) After the isostatic pressing, carry out debinding and ...

Embodiment 3

[0043] (1) Carrying out rolling molding of 92 porcelain alumina powder to obtain ceramic microball blanks, wherein the content of alumina in 92 porcelain alumina accounts for 92wt%;

[0044] (2) Dip the roll-molded ceramic microbead blank into No. 80 microcrystalline paraffin and low-density polyethylene high-temperature mixed solution for coating, wherein the microcrystalline paraffin and low-density polyethylene high-temperature mixed solution contain micro Crystal paraffin accounts for 85wt%, low-density polyethylene accounts for 15wt%, and the temperature of the mixed solution is 80°C;

[0045] (3) Take out the coated ceramic microsphere blank, and place it in a warm isostatic pressing device for isostatic pressing, wherein the temperature of the warm isostatic pressing device is set to 60° C. and the pressure is 100 MPa;

[0046] (4) After the isostatic pressing, carry out debinding and high-temperature sintering, wherein debinding is carried out at 530°C for 1 hour, the ...

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Abstract

The invention belongs to the technical field of ultrafine grinding medium preparation, and particularly relates to a preparation method of ceramic microspheres. The preparation method comprises the following steps: (1) carrying out a pre-forming process on ceramic powder to obtain a ceramic microbead ball blank; (2) immersing the preformed ceramic microbead ball blank into a paraffin and organic binder high-temperature mixed solution for coating; (3) taking out the coated ceramic microbead ball blank, and placing the ceramic microbead ball blank in temperature isostatic pressing equipment forisostatic pressing; (4) after isostatic pressing is completed, performing rubber discharging and high-temperature sintering; and (5) putting the ceramic microbeads subjected to high-temperature sintering and deionized water into a ball-milling tank, and carrying out self-grinding and polishing to obtain the ceramic microbead product. The preparation method has the characteristics of simple and convenient production process, high production efficiency and good product performance, the compressive strength of the prepared ceramic microbeads is improved by 30%, and the abrasion loss of the microbeads is reduced by 50%.

Description

technical field [0001] The invention belongs to the technical field of preparation of ultrafine grinding media, and in particular relates to a preparation method of ceramic microbeads. Background technique [0002] Ceramic microspheres refer to ceramic spheres with a diameter of less than 5mm, usually made of nano-ceramic powder as the main raw material through various molding processes. In recent years, with the development of nano-materials, ceramic grinding media with a particle size greater than 5mm can no longer meet the needs of ultra-fine grinding, and the demand for ceramic microbeads, an indispensable grinding material in the production of ultra-fine powders, is increasing. . Many ultra-fine materials at home and abroad require ultra-fine grinding with ceramic beads, such as paint, ink, dye, polishing material, battery material, cosmetics, ceramic material, etc., especially in ceramic ink, lithium battery material, nano powder and other materials. In ultrafine gri...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/10C04B35/48C04B35/632C04B35/634C04B35/638
CPCC04B35/622C04B35/632C04B35/638C04B35/63408C04B35/48C04B35/10C04B2235/3246C04B2235/3225C04B2235/3229C04B2235/77C04B2235/96
Inventor 高勇刘策王允强杨瑶刚纪庆娟王德昌
Owner 长裕控股集团股份有限公司