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Bismuth ferrite electrophoretic suspension liquid, preparation method and application thereof

A technology of electrophoretic suspension and bismuth ferrite, which is applied in electrophoretic coatings, coatings, etc., to achieve the effects of high stability, simple process, and low cost

Inactive Publication Date: 2019-03-29
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Bi x SM 1-x FeO 3 is a multiferroic material with huge applications in novel storage and devices, but has not been applied to electrophoretic suspensions so far

Method used

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  • Bismuth ferrite electrophoretic suspension liquid, preparation method and application thereof
  • Bismuth ferrite electrophoretic suspension liquid, preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0026] A kind of bismuth ferrite electrophoretic suspension, described electrophoretic suspension specifically comprises Bi x SM 1-x FeO 3 , where x=1.

[0027] The BiFeO 3 The mass fraction range of the solid phase in the electrophoretic suspension is 0.5%.

[0028] A preparation method of bismuth ferrite electrophoretic suspension, comprising the following steps:

[0029] Step 1: Synthesis of BiFeO by sol-gel method 3 Powder, the powder particle size is about 100nm;

[0030] In the second step, using toluene / ethanol as solvent, at 5°C, BiFeO 3 The powder is dispersed in the above solvent, tributyl phosphate is added, and the pH value is adjusted to 5 by hydrochloric acid, and the dispersion is uniform with mechanical stirring and ultrasonic oscillation.

[0031] Among them, the BiFeO 3 The specific preparation steps of the powder are: Fe(NO 3 ) 3 and Bi(NO 3 ) 3 (1:1 molar ratio) dissolve in deionized water, heat the solution to 80°C, add ethylenediaminetetraacet...

Embodiment 2

[0040] A kind of bismuth ferrite electrophoretic suspension, described electrophoretic suspension comprises Bi x SM 1-x FeO 3 , where x=0.9.

[0041] The Bi 0.9 SM 0.1 FeO 3 The mass fraction range of the solid phase in the electrophoretic suspension is 5%.

[0042] A preparation method of bismuth ferrite electrophoretic suspension, comprising the following steps:

[0043] Step 1: Synthesis of Bi by sol-gel method 0.9 SM 0.1 FeO 3 Powder, the powder particle size is 200nm;

[0044] Step 2, using toluene / ethanol as solvent, at 30°C, Bi 0.8 Fe 1.2 o 3 The powder is dispersed in the above solvent, tributyl phosphate is added, and the pH value is adjusted to 5.5 by hydrochloric acid, and the dispersion is uniform with mechanical stirring and ultrasonic oscillation.

[0045] Among them, the Bi 0.8 Fe 1.2 o 3 The specific preparation steps of the powder are: Fe(NO 3 ) 3 , Bi(NO 3 ) 3 and Sm(NO 3 ) 3 Dissolve in deionized water at a molar ratio of 1:0.9:0.1, hea...

Embodiment 3

[0054] A kind of bismuth ferrite electrophoretic suspension, described electrophoretic suspension comprises Bi x SM 1-x FeO 3 , where x=0.8.

[0055] The Bi 0.8 SM 0.2 FeO 3 The mass fraction range of the solid phase in the electrophoretic suspension is 10%.

[0056] A preparation method of bismuth ferrite electrophoretic suspension, comprising the following steps:

[0057] Step 1: Synthesis of Ni by chemical co-precipitation 0.5 Fe 1.5 o 3 Powder, the powder particle size is about 400nm;

[0058] Step 2, using toluene / ethanol as solvent, under the condition of 45 ℃, Ni 0.5 Fe 1.5 o 3 The powder is dispersed in the above solvent, tributyl phosphate is added, and the pH value is adjusted to 6 by hydrochloric acid, and the dispersion is uniform with mechanical stirring and ultrasonic oscillation.

[0059] Among them, the Ni 0.5 Fe 1.5 o 3 The specific preparation steps of the powder are: Fe(NO 3 ) 3 , Bi(NO 3 ) 3 and Sm(NO 3 ) 3 Dissolve in deionized water ...

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Abstract

The invention discloses a bismuth ferrite electrophoretic suspension liquid, a preparation method and application thereof. The electrophoretic suspension liquid comprises BixSm1-xFeO3, wherein x is greater than or equal to 0.8 and less than or equal to 1. The electrophoretic suspension liquid is prepared by the following two steps: synthesis of BixSm1-xFeO3 powder and disperse suspension of BixSm1-xFeO3 powder. The bismuth ferrite electrophoretic suspension liquid prepared according to the invention has the characteristics of positive charge, complete dispersion, long aging time, a zeta potential of greater than 30 mV, high stability, simple preparation process and low cost.

Description

technical field [0001] The invention belongs to the technical field of colloid chemistry and electrophoresis, relates to an electrophoretic deposition coating technology, in particular to a bismuth ferrite electrophoretic suspension and its preparation method and application. 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 in the opposite direction and deposit on the electrode to form a uniform coating. 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. There...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/44C09D7/63
CPCC09D5/448
Inventor 简刚刘美瑞郭宇航
Owner JIANGSU UNIV OF SCI & TECH