【摘要】 由自制的磺化丙酮-甲醛缩聚物(sulphonatedacetone-formaldehydeplymer,SAF)作为分散剂制备了浇注碳化硅(SiC)砂轮水基浆料。通过红外光谱,简要分析了SAF的分散机理,并以含10%(质量含量)聚乙烯醇水溶液作为分散介质,研究了不同用量SAF和不同pH值对体系沉降性的影响。采用沉降法和吸光光度法评价了SAF在SiC浆料中的分散性能。结果表明:当SAF添加的质量分数为5%,pH为10左右,体系的相对沉降层高度和吸光度均达到最大,得到了分散稳定性较好的砂轮浆料。更多还原

【Abstract】 A silicon carbide (SiC) slurry as a casting abrasive material was prepared by sulphonated acetone-formaldehyde polymer (SAF) as a dispersant. Its dispersive mechanism was studied briefly with infrared spectrography. The effects of different pH value and SAF dosage on the sedimentation behavior of SiC in the slurry were studied using 10% (in mass) polyvinyl alcohol (PVA) water solu- tion as a medium. Moreover, the dispersive performance of SAF was estimated by the measurement of sedimentation and absorbency of SiC slurry. The results show that dispersive and steady slurry is obtained with 5% (in mass) SAF, and at a pH value of 10.0, the maximum relative sedimentation height and absorbency of the slurry can be reached更多还原