Terahertz complex refractive index properties of acrylonitrile butadiene styrene with rice husk ash and its possible applications in 3D printing techniques

Terahertz (THz) plays a pivotal part in numerous technology fields in modern times, including the system of the 6^th generation wireless communication, imaging and elemental analysis. In addition to light sources and detectors, THz applications require quasi optics as lenses, waveguides, and reflectors for the design of a THz system. Three-dimensional (3D) printing has many advantages. However, 3D printing materials always have higher THz-wave absorption rates. In this study, we attempted to discover the optimum process parameters of the combustion temperature of rice husk ash (RHA) and mix RHA with acrylonitrile butadiene styrene (ABS). According to the THz spectrum, the mixture powder would be very useful in applications of 3D printing to increase the refractive index and decrease the absorption coefficient with RHA added into ABS. This improvement will benefit 3D printing technique applications in the far-infrared and THz range.