821 results about "Carbonyl iron" patented technology

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.