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Calcium titanate electric rheological liquid and preparing process thereof

A technology of electrorheological fluid and calcium titanate, which is applied in the petroleum industry, base materials, lubricating compositions, etc., can solve the problems of low shear strength and failure to reach the industrial application level, and achieve low cost, short cycle time and stable structure Effect

Active Publication Date: 2006-03-29
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects that the existing electrorheological fluid has low shear strength and cannot reach the industrial application level, thereby providing a high shear strength, low current density, stable structure, no pollution, no corrosion, and low raw material cost Calcium titanate electrorheological fluid with low cost, short cycle time and simple preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix 30ml of tetrabutyl titanate and absolute ethanol at a molar ratio of 1:20, and stir evenly to obtain a stable solution T; dissolve calcium acetate in deionized water to prepare a calcium solution C with a molar concentration of 1mol / l; mix oxalic acid Dissolve in deionized water and make a solution O with a concentration of 3mol / l; under stirring conditions, in a 40°C water bath, fully mix solution C and solution T to obtain a uniformly mixed solution CT, add nitric acid dropwise to adjust the pH of the mixed solution value to 2; then the solution O was dropped into the solution CT, and the precipitate gradually formed (the volume ratio of the three solutions was 1.0:1.0:0.7). After the reaction is complete, age the precipitate at 40°C for 8 hours, then wash the precipitate with deionized water and absolute ethanol several times, filter it, and dry it in a drying oven at 50°C for 168 hours, and then dry it at 120°C. That is, calcium titanate particles with the requi...

Embodiment 2

[0023] Mix 30ml of titanium tetrachloride and anhydrous isopropanol in a molar ratio of 1:30, and stir evenly to obtain a stable solution T; dissolve anhydrous calcium chloride in deionized water to prepare a calcium solution with a molar concentration of 3mol / l C; Dissolve oxalic acid in deionized water to prepare an aqueous solution with a concentration of 1mol / l O; under ultrasonic conditions, in a water bath at 50°C, fully mix solution C and solution T to obtain a uniformly mixed solution CT, add hydrochloric acid dropwise, and adjust The pH value of the mixed solution was adjusted to 3; then the solution O was dropped into the solution CT, and a precipitate gradually formed (the volume ratio of the three solutions was 4.7:1.0:6.4). After the reaction is complete, age the precipitate at 50°C for 10 hours, then wash the precipitate with deionized water and absolute ethanol several times, filter it, and dry it in a drying oven at 55°C for 120 hours, and then dry it at 120°C. ...

Embodiment 3

[0026] Mix 30ml of titanium tetrabromide and absolute ethanol at a molar ratio of 1:25, and stir evenly to obtain a stable solution T; dissolve calcium chloride dihydrate in deionized water to prepare a calcium solution C with a molar concentration of 2mol / l; Dissolve oxalic acid in deionized water to prepare an aqueous solution O with a concentration of 2mol / l; under stirring conditions, in a water bath at 60°C, fully mix solution C and solution T to obtain a uniformly mixed solution CT, add hydrochloric acid dropwise to adjust the mixed solution The pH value of the solution reached 4; then the solution O was dropped into the solution CT, and a precipitate gradually formed (the volume ratio of the three solutions was 2.6:1.0:2.2). After the reaction is complete, age the precipitate at 60°C for 12 hours, then wash the precipitate with deionized water and absolute ethanol several times, filter it, and dry it in a drying oven at 60°C for 140 hours, and then dry it at 120°C. That...

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Abstract

An electrorheologic liquid of calcium titanate is prepared through preparing anhydrous calcium titanate micron-particles (or nanoparticles), and mixing with dimethyl silica oil. Its advantages are strong electrorheologic effect, high shear strength and structure stability, low current density and no pollution and corrosion.

Description

technical field [0001] The invention relates to an electrorheological fluid material and its preparation technology, in particular to an anhydrous calcium titanate electrorheological fluid material and a preparation method thereof. Background technique [0002] Electrorheological fluid is a homogeneous mixture of nanometer to micron dielectric small particles and insulating oil. Normally, the electrorheological fluid is liquid, and its apparent viscosity is similar to that of oil. After the electric field is applied, the apparent viscosity of the electrorheological fluid can increase with the increase of the field strength, and even stop flowing or solidify when the field strength reaches a certain value. When the external field is removed, it can return to the original viscosity. The response time of this reversible "liquid-solid" conversion is very sensitive, generally on the order of milliseconds. Therefore, this kind of material with simple control is very easy to com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M107/50C10N40/14
Inventor 王学昭沈容陆坤权王志勇牛小娟
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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