球磨工艺和分散剂对陶瓷结合剂粉体解团聚的影响  

Effects of ball milling and dispersant on deagglomeration of vitrified bond powder

作　　者：骆苗地 丁玉龙 包华 苗卫朋 LUO Miaodi;DING Yulong;BAO Hua;MIAO Weipeng(Zhengzhou Research Institute for Abrasive & Grinding Co. , Ltd. , Zhengzhou 450001, China;State Key Laboratory of Superabrasives, Zhengzhou 450001, China)

机构地区：[1]郑州磨料磨具磨削研究所有限公司,郑州450001 [2]超硬材料磨具国家重点实验室,郑州450001

出　　处：《金刚石与磨料磨具工程》2020年第2期42-45,共4页Diamond & Abrasives Engineering

摘　　要：通过球磨工艺和添加分散剂相结合的方法对陶瓷结合剂团聚体进行解团聚,研究球磨参数和分散剂添加量对解团聚效果及结合剂机械性能的影响,并用激光粒度分析仪、SEM、万能材料试验机测试结合剂粉体解团聚前后的粒度、显微形貌、抗折强度。结果表明:采用小粒径(5 mm)的磨球,添加质量分数为2.5%的分散剂球磨2 h后,结合剂粉体分散性良好,基本没有团聚现象,其D50可降至0.186μm,且球磨后的粉体在700℃烧结后,其抗折强度达到26.2 MPa,比原始团聚体烧结后样品的强度提升了近45%。Effects of ball milling parameters and additive amount of dispersant on the deagglomeration and the mechanical properties of vitrified bond aggregate were studied.Particle-size analyzer,scanning electron microscopy and universal materials testing machine were employed to characterize the particle size,the microstructure and the flexural strength of the vitrified bond powder before and after deagglomeration.The results indicate that the D50 particle size of the vitrified bond powder is refined to 0.186μm by employing smaller size(5 mm)of the grinding media,2.5%(mass fraction)dispersant addition and 2 hours milling time.Meanwhile,the dispersion of the particle is good and there is no agglomeration after ball milling.The flexural strength of vitrified bond is 26.2 MPa after sintered at 700℃,which is about 45%higher than that of specimens made from raw powder.

关 键 词：陶瓷结合剂 球磨 六偏磷酸钠 解团聚 粉体粒度 

分 类 号：TQ174[化学工程—陶瓷工业]