Low viscosity stability non-water-base magnetic rheology polishing liquid and preparation method thereof

Abstract

The invention discloses non-aqueous magnetorheological polishing fluid which is steady at low viscosity and a preparation method thereof. The non-aqueous magnetorheological polishing fluid comprises basic carrier fluid which accounts for 40 to 75 percent of the total volume of the magnetorheological polishing fluid, 15 to 50 percent of carbonyl iron powder, 3 to 8 percent of surfactant and 3 to 6 percent of polishing powder, wherein, the basic carrier fluid is dimethicone. The preparation method of the invention is as follows: the surfactant is completely dissolved in the basic carrier fluid by heating and stirring, then the magnetic granular carbonyl iron powder and the basic carrier fluid mixture are mixed, then a ball-grinding device of a ball grinder is adopted to disperse the mixture so as to improve the anti-sedimentation property and the stability of the magnetorheological polishing fluid to finally ensure that the prepared magnetorheological polishing fluid always keeps rolling to maintain the stability of the characteristic of the magnetorheological polishing fluid. The polishing fluid prepared by the invention has low zero magnetic field viscosity, big shear yield stress and good magnetorheological performance, is suitable for the processing of deliquescent optical materials, and has a simple preparation process, no toxicity, and low cost.

Description

technical field [0001] The invention belongs to magnetorheological polishing of optical parts, in particular to a low-viscosity stable non-water-based magnetorheological polishing liquid and a preparation method thereof. Background technique [0002] Magneto-rheological polishing technology is a new type of optical processing method. It uses the rheology of magnetorheological polishing fluid in a magnetic field to polish optical parts, which can achieve deterministic removal and sub-nanometer surface roughness. Among them, magnetorheological The performance of the polishing fluid directly determines the effect of magnetorheological polishing, and is a key component of magnetorheological polishing technology. According to the processing characteristics of magnetorheological polishing technology, the main performance requirements for magnetorheological polishing fluid are: low zero magnetic field viscosity, magnetorheological polishing fluid can circulate in the circulation eq...

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Problems solved by technology

[0003] In the current magnetorheological polishing process, most of them use water-based magnetorheological polishing fluid. The base carrier fluid of this type of polishing fluid is water, so it is relatively easy to prepare low-viscosity, non-toxic, etc. suitable for magnetorheological polishing. characteristics, but the water-based magnetorheological polishing fluid is recognized as a difficult problem to solve: easy to settle, easy to oxidize, and easy to agglomerate; in addition, because it contains water, its processing range is limited, and it is not suitable for processing optical materials with deliquescent characteristics. Such as potassium dihydrogen phosphate functional crystal

At present, magnetorheological fluids whose base carrier fluid is silicone oil are widely used in magnetorheological dampers, magnetorheological shock absorbers, and magnetorheological sealing devices. The main performance requirements of

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