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A method for surface modification of ceramic powder

A ceramic powder and surface modification technology, which is applied in coating, dyed organic silicon compound treatment, dyed low-molecular organic compound treatment, etc., can solve the problems that the powder is not easy to agglomerate and the effect is not good, and achieve uniform particle size distribution , Improve technical problems, the effect of not being easy to reunite

Active Publication Date: 2021-04-16
GUANGDONG REAL FAITH LIGHTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned problems in the prior art, the present invention provides a method for surface modification of ceramic powder, which can modify the surface of ceramic powder, so that the powder is not easy to agglomerate, can be evenly dispersed in the solvent, and improves the direct adding method. Technical issues with surface modifiers but poor results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, the polarity difference between the first solvent and the second solvent is 7.8.

[0036] The invention provides a method for surface modification of ceramic powder, comprising the steps of:

[0037] S1: Al with a particle size of 30nm 2 o 3 The ceramic powder is dispersed in a mixed solution of water and absolute ethanol, and the powder is fully soaked in the solvent by rapid stirring or ultrasound to make Al 2 o 3 ceramic powder dispersion,

[0038] The volume ratio of water and absolute ethanol is 1:1,

[0039] Al 2 o 3 The weight ratio of ceramic powder to mixed solution of water and absolute ethanol is 1:1;

[0040] S2: Take toluene, add Span-40, and stir through high-speed shearing to turn the solution into an emulsion,

[0041] Toluene and Al 2 o 3 The weight ratio of the ceramic powder dispersion is 0.5:1,

[0042] The addition of Span-40 is 1% of the weight of the total ceramic powder solution;

[0043] S3: Quickly disperse and s...

Embodiment 2

[0047] In this embodiment, the polarity difference between the first solvent and the second solvent is 4.8.

[0048] The invention provides a method for surface modification of ceramic powder, comprising the steps of:

[0049] S1: Disperse the BN ceramic powder with a particle size of 3um in acetone, stir rapidly or ultrasonically to fully soak the powder in the solvent, and make a BN ceramic powder dispersion.

[0050] Al 2 o 3 The weight ratio of ceramic powder to acetone is 1:2;

[0051] S2: Take water, add Tween-40, and stir through high-speed shearing to turn the solution into an emulsion,

[0052] The weight ratio of water to BN ceramic powder dispersion is 1:1,

[0053] Tween-40 addition is 2% of total ceramic powder solution weight;

[0054] S3: quickly disperse and stir the emulsion in S2 with a high-speed dispersing wheel type agitator, then slowly add the ceramic powder dispersion in S1 to it, and continue to disperse and stir for 10 minutes at a speed of 1000 ...

Embodiment 3

[0058] In this embodiment, the polarity difference between the first solvent and the second solvent is 6.0.

[0059] The invention provides a method for surface modification of ceramic powder, comprising the steps of:

[0060]S1: Disperse the SiC ceramic powder with a particle size of 5um in a mixed solution of tetrahydrofuran and propylene glycol methyl ether acetate, stir rapidly or ultrasonically to fully soak the powder in the solvent, and make a SiC ceramic powder dispersion.

[0061] The volume ratio of tetrahydrofuran to propylene glycol methyl ether acetate is 2:1,

[0062] Al 2 o 3 The weight ratio of the ceramic powder to the mixed solution of acetone tetrahydrofuran and propylene glycol methyl ether acetate is 1:1;

[0063] S2: Take water, add silicone oil-type surfactant DC193, and stir through high-speed shearing to turn the solution into an emulsion,

[0064] The weight ratio of water to SiC ceramic powder dispersion is 3:1,

[0065] The amount of silicone o...

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Abstract

The invention discloses a method for modifying the surface of ceramic powder, which belongs to the technical field of inorganic material modification. The method includes the following steps: S1: Disperse the ceramic powder in the first solvent to fully infiltrate the ceramic powder to obtain a ceramic powder dispersion; S2: Take the second solvent, add a dispersant, and stir at high speed to obtain an emulsion ; The sequence of S1 and S2 can be changed or can be carried out at the same time; S3: Take the uniformly dispersed emulsion, add the ceramic powder dispersion and continue to stir to obtain a ceramic powder solution with evenly dispersed ceramic powder; S4: Put the ceramic powder solution into drying in an oven to obtain a surface-modified ceramic powder; wherein: the particle size of the ceramic powder is 30nm-10um. Through the method of the invention, the ceramic powder is surface-modified, so that the powder is not easy to agglomerate and can be evenly dispersed in a solvent, thereby improving the technical problem that the surface modifier is directly added but the effect is not good.

Description

technical field [0001] The invention belongs to the technical field of inorganic material modification, and relates to a method for modifying the surface of ceramic powder. Background technique [0002] Ceramic materials have excellent electrical, thermal, and optical stability, and have been widely used in electronics, electrical appliances, aerospace and other fields. Ceramic powder has most of the properties of ceramic materials and is widely used in coatings to improve the performance of coatings. [0003] In the application of coatings, inorganic ceramic powder filled with organic resin combines the excellent mechanical properties, wear resistance and corrosion resistance of inorganic ceramics and high thermal conductivity and heat resistance with the high flexibility and processability of organic resins, which can significantly improve the performance of organic resins. The thermal properties, mechanical properties, and tribological properties of materials have attrac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/04C09C3/08C09C3/12C09D7/62
CPCC08K3/34C08K9/04C08K2003/2227C08K2003/385C08K2201/011
Inventor 林家声董睿智丁萍
Owner GUANGDONG REAL FAITH LIGHTING TECH