Impact of absorptivity and wavelength on the optical properties of aggregates with sintering necks

In this paper, we constructed sintered aggregates based on the particle superposition model and apply the ball-necking factor eta to characterize the sintering degree. The impact of the absorptivity characterized by the complex refractive index m and the wavelength of the incident light lambda on the optical properties of aggregates with different eta were compared and investigated. The results indicate that for different m and lambda, the light scattering characteristics exhibit regular changes in the values, the peak locations and the size trends. Further, the deviation of 1 - S-22/S-11 caused by various eta is noteworthy and considerable so that it can be used as a probe sensor parameter in the detection of the sintered aggregates configuration. (C) 2018 Elsevier Ltd. All rights reserved.