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Method for preparing ceramic microspheres by adopting direct titration molding technology

A technology of ceramic microspheres and titration, which is applied in ceramic molding machines, manufacturing tools, and liquid droplets and granulation, etc., can solve the problems of low uniformity of microsphere molding, difficult automatic control, and cumbersome production process. Achieve automatic control, efficient automatic control, good internal uniformity

Pending Publication Date: 2021-06-11
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low uniformity of microsphere formation, insufficient roundness, cumbersome production process, and difficulty in realizing automatic control in the prior art, the present invention provides a method for preparing ceramic microspheres using direct titration forming technology

Method used

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  • Method for preparing ceramic microspheres by adopting direct titration molding technology
  • Method for preparing ceramic microspheres by adopting direct titration molding technology

Examples

Experimental program
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Effect test

Embodiment 1

[0052] A method for preparing ZrO2 microspheres by direct titration molding technology (gel casting process), mainly includes the following steps:

[0053] Step 1. Take 800g of ZrO2 ceramic powder with an average particle size of 0.1 μm, weigh 2.5% of the powder’s mass of acrylamide, 0.29% of the powder’s mass of N-N’methylenebisacrylamide, and Ammonium polycarboxylate with a mass of 1.0% and water accounting for 18% of the mass of the powder were stirred for 10 minutes to prepare a water solvent, and the ZrO2 ceramic powder and water solvent were added to a 20L planetary ball mill tank, wherein the spherical tank was a polyurethane tank, and the ball mill The medium is a ZrO2 ball with a diameter of 3 mm, and the ratio of material to ball (mass ratio) is 2:1. The rotational speed of the ball mill was set at 180r / min. After 7 hours of ball milling, the fluidity of the slurry was good. The measured viscosity was 82mPa·s (room temperature, rotational speed 20s-1), and the solid ...

Embodiment 2

[0058] A method for preparing ZrO2 microspheres by direct titration molding technology (normal temperature curing process), mainly comprising the following steps:

[0059] Step 1, get the ZrO2 powder 800g that average particle size is 0.1 μm, take by weighing the ammonium polycarboxylate dispersant that accounts for 1.0% of powder mass and the water that accounts for 20% of powder mass, make water solvent after stirring 10min; ZrO2 powder and water solvent are added to a 20L planetary ball mill tank, wherein the spherical tank is a polyurethane tank, the ball milling medium is a ZrO2 ball with a diameter of 3mm, and the material-to-ball ratio (mass ratio) is 2:1. The rotational speed of the ball mill was set at 180r / min. After 7 hours of ball milling, the fluidity of the slurry was good. The measured viscosity was 66mPa·s (room temperature, rotational speed 20s-1), and the solid content was 80%. Add Isobam, a normal temperature curing agent accounting for 1% of the mass of the...

Embodiment 3

[0064] A method for preparing Gd2O2S microspheres by direct titration molding technology (gel casting process), mainly includes the following steps:

[0065] Step 1: Take 800 g of Gd2O2S powder with an average particle size of 0.05 μm, weigh 2.55% of the mass of the powder, acrylamide, 0.31% of N-N'methylenebisacrylamide, 1.2% of ammonium polycarboxylate and Water, which accounts for 25% of the mass of the powder, is stirred for 10 minutes to obtain a water solvent; Gd2O2S powder and water solvent are added to a 20L planetary ball mill tank, wherein the spherical tank is a polyurethane tank, and the ball mill medium is a ZrO2 ball with a diameter of 3mm. (Mass ratio) is 2:1. The rotational speed of the ball mill is set at 180r / min. After 7 hours of ball milling, the fluidity of the slurry is good. The measured viscosity value is 110mPa•s (room temperature, rotational speed 20s-1), and the solid content is 80%. Add 0.47‰ of ammonium persulfate and 0.18‰ of tetramethylethylened...

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Abstract

The invention discloses a method for preparing ceramic microspheres by adopting a direct titration molding technology. The method mainly comprises the following steps: weighing ceramic powder and a water solvent, carrying out ball milling on the ceramic powder and the water solvent to obtain ceramic slurry with a solid content of 75-85%, adding a curing agent into the ceramic slurry, and conducting uniform mixing, wherein forming of the ceramic slurry is carried out on dispensing machine system equipment; preparing a super-hydrophobic film on the surface of an inclined-plane track, controlling the ceramic slurry injected by a titration needle cylinder to form liquid drops with sizes of 0.1-1.5 mm, allowing the liquid drops to drop to the top end of the inclined-plane track, and enabling the liquid drops to freely roll to the bottom end from the top end of the inclined-plane track so as to complete curing to form a ball blank; and drying the ball blank for 5-10 hours at a temperature of 100-120 DEG C, conducting degreasing for 10-20 hours at a temperature of 550-600 DEG C, performing sintering at a temperature of 1400-1550 DEG C, and keeping the ball blank at the temperature for 2-5 hours to obtain the ceramic microspheres. The prepared ceramic microspheres are high in sphericity degree and uniform in internal structure, and have the advantages of being low in process cost, few in procedure, high in efficiency, easy to achieve automatic control and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic ceramic microspheres, in particular to a method for preparing ceramic microspheres by adopting direct titration forming technology. Background technique [0002] Ceramic microspheres generally refer to spherical structures or functional materials with a diameter of less than 1mm (usually 0.1mm~1mm). At present, the types of microspheres commonly used in the field of ceramic microspheres include: grinding media (such as ZrO2 ceramic microspheres for grinding powder in sand mills), functional types (such as Gd2O2S for new cold storage materials in G-M ultra-low temperature refrigerators, lithium ceramics (Li4SiO4 and Li2TiO3) and ZrN ceramic microspheres are used for tritium-producing cladding functional materials and inert matrix materials in the nuclear industry, respectively). [0003] In the current field of ceramic microsphere molding technology, it mainly includes rolling met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/486C04B35/58C04B35/547C04B35/16C04B35/626C04B35/634B28B1/00B01J2/02
CPCC04B35/622C04B35/486C04B35/58028C04B35/547C04B35/16C04B35/6263C04B35/63444B28B1/004B01J2/02C04B2235/3203C04B2235/3895C04B2235/656C04B2235/6567C04B2235/6023C04B2235/95C04B2235/96
Inventor 杨硕刘汉强薛建强师琳璞苏摇
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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