精密研磨用碳化硅微粉制备中水质的影响

Influence of water quality on the performances of SiC powder for precision lapping

水质对湿法分级制备碳化硅微粉起着决定性作用。本研究以单号溢流法制备精密研磨用碳化硅微粉为例,通过研磨效果分析,对水质几项主要指标如pH值、电导率、硬度对碳化硅微粉性能的影响进行研究与探讨。研磨试验结果表明,水质对碳化硅微粉粒度分布有较大影响,最佳水质指标为:pH值6～8,电导率30 mS/m以下,硬度0.05 mmol/L以下。研究结果对于提高碳化硅微粉的品质及经济价值具有很大的意义。

The water quality plays a decisive role in the process of the water classification for SiC micro powder manufacture . Taking the method of overflow as example, the authors researched the main index of the water quality including pH value, conductivity and hardness on the grit size distribution of the SiC micro powder. The results, together with the lapping tests, indicated that the maximal index of water quality were ： pH value 6 - 8, conductivity 〈 30 mS/m and hardness 〈 0.05 mmol/L.