Magnetorheologicai polishing liquid and preparation method thereof

A technology of magnetorheological polishing and polishing powder, which is applied in the directions of magnetic liquids, polishing compositions, chemical instruments and methods, etc., can solve the problems of undiscovered reports or literature, unsuitable for magnetorheological polishing, unsuitable for optical polishing, etc. Achieve good anti-settling and agglomeration stability, good polishing effect and consistent performance

Inactive Publication Date: 2008-03-12
XIAN TECHNOLOGICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese Patent Publication No. CN1414075, published on April 30, 2003, the name of the invention is "stable magnetorheological fluid and its preparation method". The application discloses a stable magnetorheological fluid consisting of a suspension phase, Composed of carrier liquid, inorganic thixotropic agent and surfactant, although it has the characteristics of good anti-sedimentation effect and stability, but its service life is short, so it is not suitable for magnetorheological polishing
Chinese Patent Publication No. CN1632891A, published on June 29, 2005, the name of the invention is "Magnetor...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: magnetorheological polishing liquid is made up of magnetic particles, purified water, additive, surfactant and polishing powder, and its volume percentage is:

[0039] Magnetic particles 30%

[0040] Purified water 50%

[0041] Additive 7%

[0042] Surfactant 5%

[0043] Polishing powder 8%

[0044] The additive is a stabilizer, and the magnetic particles are suspended phases of iron powder with an average particle size of ≤3.5um.

[0045] The preparation method is to firstly carry out surface purification and activation treatment on the magnetic particles. In this example, the magnetic particles are carbonyl iron powder particles. The specific preparation process is carried out according to the following steps:

[0046] 1. Weigh the magnetic particles by volume percentage and put them into the ball mill jar;

[0047]2. Take the surfactant by volume percentage and mix it with ethanol equivalent to 50% of the volume of the magnetic particles, and shake...

Embodiment 2

[0059] Embodiment 2: manufacture step is with embodiment 1, and concrete selected composition is mostly also with embodiment 1, but the volume percent of each composition is respectively:

[0060] Magnetic particles 35%

[0061] Purified water 50%

[0062] Additive 5%

[0063] Surfactant 5%

[0064] Polishing powder 5%

[0065] In this embodiment, organic bentonite is selected as the additive; in the third step of the preparation process, the rotational speed of the ball mill is 200 rpm when the surfactant is mixed with the magnetic particles. The zero-field viscosity of the magnetorheological fluid at room temperature is 800mPa.s, without obvious sedimentation and compaction, and can be suspended again under the action of a weak magnetic field.

[0066] The magnetorheological polishing liquid is used to polish K9 glass on the magnetorheological polishing machine of Xi'an Technological University. After 30 minutes, the roughness Sa of the processed surface can reach 1.8nm,...

Embodiment 3

[0067] Embodiment 3: carry out embodiment 1 repeatedly by described same step, but the volume percent of each composition is:

[0068] Magnetic particles 40%

[0069] Purified water 45%

[0070] Additive 5%

[0071] Surfactant 5%

[0072] Polishing powder 5%

[0073] In this embodiment, except that polyethylene glycol is selected as the surfactant, the other specific selected ingredients are the same as in Example 1. In the third step of the preparation process, the ball milling speed is 500 rpm when mixing the surfactant and the magnetic particles. The zero-field viscosity of the magnetorheological fluid at room temperature is 1050mPa.s, without obvious sedimentation and compaction, and can be suspended again under the action of a weak magnetic field.

[0074] The magnetorheological polishing liquid is used to polish the K9 glass plane on the magnetorheological polishing machine of Xi'an University of Technology. After 30 minutes, the roughness Sa of the processed surface...

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Abstract

The invention relates to a magnetic rheological polishing fluid and a preparing method for the fluid. The magnetic rheological polishing fluid comprises by volume magnetic particles 30-40%, pure water 45-55%, additive 5-10%, surface active agent 3-5% and polishing powder 5-8%. The preparing method comprises: the magnetic particles are surface cleaned and activated, the surfaces of the magnetic particles are treated by a hi-speed ball pulverizer. The magnetic rheological polishing fluid prepared by the invention is of hydrolyzation function. The preparing method is simple. The fluid is of a good resistance to settlement and conglobation, low zero-field viscosity, high polishing efficiency, good effect, long service life, and is applicable for optic polishing. The invention solves such problems of prior magnetic rheological polishing fluid as high viscosity, weak magnetizing strength, liable to caking, not stable in settling and conglobation, liable to rust, short service life and low efficiency. The magnetic rheological polishing fluid prepared by the invention is of high efficiency, and can facilitate the surface finish of a k9 glass to increase from 400nm to 0.6 nm in 30 minutes. The invention can be widely used in the super surface polishing of optic glass.

Description

technical field [0001] The invention belongs to magnetorheological fluid and a preparation method thereof, in particular to a magnetorheological fluid used for polishing optical parts and a preparation method thereof. Specifically, it is a novel magnetorheological polishing fluid and a preparation method thereof. Background technique [0002] As a smart material, magnetorheological fluid generally consists of three parts: magnetic solid particles, carrier liquid and stabilizer. Magnetorheological fluids with good performance can produce obvious magnetorheological effects under the action of a magnetic field, that is, to achieve fast and reversible conversion between liquid and solid, and this conversion is completed in milliseconds. During this process, the viscosity of magnetorheology remains continuous and changes steplessly. The entire conversion process is extremely fast and controllable, with extremely low energy consumption, and real-time active control can be realize...

Claims

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Application Information

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IPC IPC(8): C09G1/18H01F1/44
Inventor 刘卫国王红军田爱玲郭忠达杭凌侠陈智利刘丙才
Owner XIAN TECHNOLOGICAL UNIV
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