功率超声处理破碎液体中TiN颗粒研究  

Comminution process of TiN particles in liquid by ultrasonic treatment

作　　者：马继宇[1] 康进武[1] 黄天佑[1] 

机构地区：[1]清华大学机械工程系,先进成形制造教育部重点实验室,北京100084

出　　处：《实验技术与管理》2013年第8期24-29,共6页Experimental Technology and Management

基　　金：国家自然科学基金资助项目(51075299)

摘　　要：采用大功率超声处理设备对微米级TiN颗粒进行了以亚微米级破碎为目的的研究。较系统地研究了超声功率、处理时间、颗粒含量、液体体积对TiN颗粒破碎动力学过程的影响,分析了超声空化效应和颗粒之间的碰撞对TiN破碎的影响及破碎极限。结果表明,超声处理可以对水中的TiN颗粒进行有效破碎及弥散,能将平均粒径为264μm的TiN颗粒(2～700μm)减小至20μm(0.2～80μm);随着超声作用时间的延长,粒度分布曲线逐渐往小粒径方向移动,会生成大量的弥散分布的小于1μm的接近200nm的TiN颗粒。A high power ultrasonic treatment equipment was used for the breakage of large size TiN particles in liquid at microscale into sub-micron particles. The effects of ultrasonic power, treatment time, solids concentration and liquid volume on the kinetics of comminution process of TiN were studied. The additional cavitation effect and particle collisions on the influence of the comminution process were also analyzed. The results show that ultrasonic treatment modifies both the particle size of TiN and its dispersion. TiN as received with mean particle size 263μm（2 -700 μm） was reduced to the mean particle size of 20 μm（0.2～80μm）a number of sub-micro TiN fragments were also produced and dispersed with prolonged ultrasonic treatment.

关 键 词：超声处理 激光粒度分析 氮化钛颗粒 粒度分布 

分 类 号：O426.9[理学—声学]