论文部分内容阅读
针对重结晶法硼包覆工艺的不足,采用了双溶剂法对硼颗粒进行包覆。应用pH法对包覆效果进行验证。设计正交实验研究了超声波混合时间、蒸发温度和搅拌速度这三种因素对双溶剂法包覆效果的影响。试验结果表明:双溶剂法的包覆效果要优于重结晶法;超声波混合时间的最优水平为10min,使用超声波混合可以有效地提高双溶剂法包覆效果;蒸发温度的最优水平为350℃,提高蒸发温度有利于促进包覆效果,但温度越高时,提高温度对包覆效果的促进作用将减弱;搅拌速度的最优水平为200r/min,一定的搅拌速度可以维持硼在溶液中的均匀分散,有利于硼颗粒的包覆,但搅拌速度过快又会使已经包覆在硼颗粒表面的LiF在剪切力的作用下重新从硼表面脱落,降低了包覆效果。
For the lack of recrystallization boron coating process, the use of double-solvent boron particles coated. Applying the pH method to verify the coating effect. The effects of ultrasonic mixing time, evaporation temperature and stirring speed on the coating effect of double-solvent method were studied by orthogonal design. The experimental results show that the double solvent method is better than the recrystallization method. The optimum ultrasonic mixing time is 10 min. Ultrasonic mixing can effectively improve the effect of double-solvent coating. The optimal evaporation temperature is 350 ℃, increasing the evaporation temperature is conducive to promote the coating effect, but the higher the temperature, the effect of increasing the temperature on the coating effect will be weakened; the optimum stirring speed of 200r / min, a certain stirring speed can maintain boron in the solution In the uniform dispersion is conducive to the coating of boron particles, but the stirring speed will make the coating has been coated on the surface of the boron particles LiF under the action of shear force from the boron surface off again, reducing the coating effect.