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分析了现有磁性液体合成装置的弊端,并进行针对性改装和部分设计。改装后的合成装置主要由脉冲电源、冷却、温控、搅拌、进料和调节等六部分组成。利用新改制的合成装置,对气-液两相介质进行脉冲活化和电离,通过适当控制脉冲频率、脉冲电压、工作电流等放电参数和反应过程的温度,只需2h左右即可合成性能较好的磁性液体,极大地缩短了制备周期。利用SEM,VSM和电子天平等技术手段对产品进行检测分析,构成磁性液体的磁性颗粒平均粒径为10nm,密度为1.025g/cm3,磁饱和磁化强度达3×105A/m,没有磁滞现象。并根据磁性液体场致效应明显特性,研制出“封闭式磁性液体立体磁场观察器”。
The disadvantages of the existing magnetic liquid synthesizer are analyzed, and some modification and partial design are carried out. The modified synthesis device is mainly composed of six parts: pulse power supply, cooling, temperature control, stirring, feeding and adjusting. The gas-liquid two-phase medium is activated by pulse and ionized by using the newly synthesized synthesis device. By controlling the discharge parameters such as pulse frequency, pulse voltage and operating current and the temperature of the reaction process properly, the synthesis performance is good in about 2h Of the magnetic liquid, greatly shortening the preparation cycle. The products were detected and analyzed by SEM, VSM and electronic balance. The average particle size of the magnetic particles constituting the magnetic liquid was 10nm, the density was 1.025g / cm3, the magnetic saturation magnetization was 3 × 105A / m, and there was no hysteresis . And according to the magnetic field-induced effect of obvious characteristics, developed a “closed magnetic liquid stereo magnetic field observer ”.