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Electrophoretic suspension for substrate surface layer coating and preparation method thereof

An electrophoretic suspension, surface layer technology, applied in electrophoretic plating, coating, electrolytic coating, etc., to achieve the effect of uniform and thorough dispersion, high stability and simple process

Inactive Publication Date: 2019-02-01
ZHENJIANG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] mn x Fe 3-x o 4 It is a ferrite material, which has great applications in the fields of wave absorption, microwave, etc., but it has not been applied to electrophoretic suspension so far

Method used

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  • Electrophoretic suspension for substrate surface layer coating and preparation method thereof
  • Electrophoretic suspension for substrate surface layer coating and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of electrophoretic suspension that is used for substrate surface layer coating of the present invention, comprises Mn x Fe 3-x o 4 Solid phase, where x=1.

[0027] The MnFe 2 o 4 The mass fraction range of the solid phase in the electrophoretic suspension is 15%.

[0028] A kind of preparation method of the electrophoretic suspension that is used for substrate surface coating of the present invention comprises the following steps:

[0029] Step 1. Preparation of Mg by combining solid phase method and high energy ball milling x Fe 3-x o 4 Powder, the powder particle size is 200nm;

[0030] Step 2, using ethanol / acetylacetone as solvent, at 5°C, MnFe 2 o 4 The powder is dispersed in the above solvent, tributyl phosphate is added, and the pH value is adjusted to 5 by glacial acetic acid, and the dispersion is uniform with mechanical stirring and ultrasonic oscillation.

[0031] Among them, the MnFe 2 o 4 The specific preparation steps of the powder are:...

Embodiment 2

[0040] An electrophoretic suspension for substrate surface coating according to the present invention specifically includes MnxFe3-xO4 solid phase, wherein x=0.8.

[0041] The mass fraction range of the Mn0.8Fe2.2O4 solid phase in the electrophoretic suspension is 5%.

[0042] A kind of preparation method of manganese ferrite electrophoretic suspension of the present invention comprises the following steps:

[0043] Step 1. Preparation of Mg by combining solid phase method and high energy ball milling x Fe 3-x o 4 Powder, powder particle size is 100nm;

[0044] Step 2, using ethanol / acetylacetone as solvent, at 30°C, Mn 0.8 Fe 2.2 o 4 The powder is dispersed in the above solvent, tributyl phosphate is added, and the pH value is adjusted to 5.5 by glacial acetic acid, and the dispersion is uniform with mechanical stirring and ultrasonic oscillation.

[0045] Among them, the Mn 0.8 Fe 2.2 o 4 The specific preparation steps of the powder are: the MnCO 3 and Fe 2 o 3 ...

Embodiment 3

[0054] A kind of electrophoretic suspension that is used for substrate surface layer coating of the present invention, specifically comprises Mn x Fe 3-x o 4 Solid phase, where x = 0.5.

[0055] The Mn 0.5 Fe 2.5 o 4 The mass fraction range of the solid phase in the electrophoretic suspension is 1%.

[0056] A kind of preparation method of the electrophoretic suspension that is used for substrate surface coating of the present invention comprises the following steps:

[0057] Step 1. Preparation of Mg by combining solid phase method and high energy ball milling x Fe 3-x o 4 Powder, powder particle size is 20nm;

[0058] Step 2, using ethanol / acetylacetone as solvent, at 45°C, Mn 0.5 Fe 2.5 o 4 The powder is dispersed in the above solvent, tributyl phosphate is added, and the pH value is adjusted to 6 by glacial acetic acid, and the dispersion is uniform with mechanical stirring and ultrasonic oscillation.

[0059] Among them, Mn 0.5 Fe 2.5 o 4 The specific prep...

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Abstract

The invention discloses an electrophoretic suspension for substrate surface layer coating and a preparation method of the electrophoretic suspension. The electrophoretic suspension specifically comprises MnxFe3-xO4, wherein 0.5<=x<=1. The preparation method comprises the following steps of the synthesis and dispersive suspension of MnxFe3-xO4 powder. The electrophoretic suspension prepared according to the preparation method of the electrophoretic suspension has positive charge, dispersion is complete, the aging time is long, Zeta potential is larger than 40mV, the stability is high, the preparation process is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of colloid chemistry and electrophoresis, relates to electrophoretic deposition coating technology, in particular to an electrophoretic suspension used for substrate surface coating and a preparation method thereof. Background technique [0002] Electrophoretic deposition is a widely used material coating preparation technology. Its principle is to pass an electric field into the suspension of charged particles. Under the action of the electric field, the charged particles move to the opposite polarity and deposit on the electrode to form a uniform The thickness of the film layer can be in the range of 0.2 μm to 200 μm. Its advantages include controllable coating thickness, accurate stoichiometric ratio, simple equipment, and not limited by the shape of the substrate. The properties of the electrophoretic suspension, such as stability, are key factors in determining the performance of the coating. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/02
CPCC25D13/02
Inventor 赵飞
Owner ZHENJIANG COLLEGE