纳米金刚石计算机磁头抛光液的研制及应用

用聚氧乙烯型非离子表面活性剂可有效分散纳米金刚石于油介质中,由此制得了纳米金刚石抛光液,探讨了纳米金刚石的分散机理,认为庞大的亲水性基团聚氧乙烯基象一巨大的屏障膜,使纳米金刚石颗粒在油中相互弹开,削弱颗粒间的相互作用能,阻止了纳米颗粒的重新团聚,从而实现了纳米金刚石在油中的稳定分散.本文研制的纳米金刚石抛光液应用于计算机磁头的精抛光,能降低计算机磁头表面粗糙度50%以上,解决了计算机磁头行业的技术难题.实验结果表明,纳米金刚石是一种理想的计算机磁头抛光材料.

Development and Application of Nano-scale Diamond Polishing Slurry of Computer Magnetic Head

Nano-scale diamond powder can be effectively dispersed in oil media by using polyoxyethylene type nonionics,nano-scale diamond polishing slurry was prepared from this,and the dispersion mechanism of nano-scale diamond was discussed in this paper. We consider the dispersion mechanism is due to polyoxylene group like a huge protective screen film to hinder nanometer particles aggregation,and terminal polar group of polyoxyethylene type nonionics adsorbed and/or chemical bonded the active group of nano-scale diamond to make nano-scale diamond have lipophilicity. When the nano-scale diamond slurry synthesized in this paper was used to the computer magnetic head super-precision polishing process,the surface roughness of magnetic head can be decreased more than 50%,and the technical difficulty problems of the magnetic head manufacturing enterprise was solved. The results showed that nano-scale diamond is a excellent polishing material.