CAJ | 학술논문

采用功率超声处理设备研究了超声空化对多孔TiN颗粒的破碎作用.激光粒度分析结果表明随着超声作用时间的延长，多孔TiN颗粒发生破碎，经过一定时间超声作用后会有大量的亚微米级颗粒生成(0.2μm~1μm)。较系统地研究了超声功率、处理时间、颗粒含量、液体体积对多孔TiN颗粒破碎过程的影响。结合扫描电镜结果分析了超声空化对多孔氮化钛颗粒的破碎机理。
채용공솔초성처리설비연구료초성공화대다공TiN과립적파쇄작용.격광립도분석결과표명수착초성작용시간적연장，다공TiN과립발생파쇄，경과일정시간초성작용후회유대량적아미미급과립생성(0.2μm~1μm)。교계통지연구료초성공솔、처리시간、과립함량、액체체적대다공TiN과립파쇄과정적영향。결합소묘전경결과분석료초성공화대다공담화태과립적파쇄궤리。
In this study,a high-intensity ultrasonic treatment system was used for the fragmentation of micrometer sized porous TiN ceramic particles in the range of 100~700 μm. Fragmentation of particles was observed and substantial sub-micron particles(ranging from 0. 2~1μm)were obtained by laser particle size analyzer. The effects of various pa-rameters such as applied ultrasonic power,treatment time,solids concentration and liquid volume on fragmentation were investigated. The results indicated that the relationship between the specific ultrasound energy and the mean particle size of the particles can be described by an empirical size-energy model. Based on laser particle size analyzer and SEM,the mechanism of fragmentation of porous TiN was proposed and characterized. The fraction of sub-micron particles became more pronounced with increased duration and applied power,but with decreased solids concentration and suspension volume. Through incorporation with XRD and DSC, the lattice strain induced in particle during ultrasonic treatment was detected.