微米稀土粉体表面改性技术研究

Research of the micron composite powders containing rare earth surface modification

本文采用稀土粒子与蛇纹石粉体组成的微米复合粉体,研究了油酸、Span、硼酸酯对其的表面改性效果,确定了复合改性剂的复配配比为油酸∶Span∶硼酸酯=43.1∶24.1∶32.8。通过实验,得到了较优工艺条件:复合改性剂添加量5.8%,改性温度75℃,改性时间80min。改性后的微米稀土粉体表现出良好的亲油疏水性,提高了其在机油中的分散稳定性。

This paper studies the effect of surface modification on composite powders containing rare earth and serpentine by using oleic acid,Span and boric acid ester. The composite modifier which is mixed oleic acid,span and boric acid ester by 43.1∶24.1∶32.8 is ascertained. The optimized process condition is obtained through the ex-periment： composite modifier dosage 5.8%,modification temperature 75℃,modification time 80 min. The modified micron composite powders containing rare earth are showing better oil-wet hydrophobic,improved the dispersion stability in the engine oil.