Grain size is one of the most important physical parameters for randomly packed granular(RPG)materials.Its estimation,especially in situ,plays a key role in many natural and industrial processes.Here,the application o...Grain size is one of the most important physical parameters for randomly packed granular(RPG)materials.Its estimation,especially in situ,plays a key role in many natural and industrial processes.Here,the application of laser-induced breakdown spectroscopy(LIBS)was investigated experimentally to estimate the grain size in RPG materials.The experiment was performed by taking sieved copper microspheres with discrete median diameters ranging from 53 to 357μm as examples and by measuring the plasma emissions induced by 1064 nm laser pulses with a duration of 7 ns in an air environment(see Fig.1).展开更多
基金National Key R&D Program of China(2017YFA0402300)National Natural Science Foundation of China(11974359,U1632143)。
文摘Grain size is one of the most important physical parameters for randomly packed granular(RPG)materials.Its estimation,especially in situ,plays a key role in many natural and industrial processes.Here,the application of laser-induced breakdown spectroscopy(LIBS)was investigated experimentally to estimate the grain size in RPG materials.The experiment was performed by taking sieved copper microspheres with discrete median diameters ranging from 53 to 357μm as examples and by measuring the plasma emissions induced by 1064 nm laser pulses with a duration of 7 ns in an air environment(see Fig.1).
