Development of porous composite ceramic with sugarcane fiber filler for sound absorber materials.

This article focuses on the fabrication and characterization of porous ceramic composite materials incorporating natural sugarcane bagasse fiber fillers for use as sound absorbers. The composites are made from silica with varying amounts (0.5, 0.75, and 1.0 g) and sizes (212, 425, and 630 µm) of sugarcane bagasse powder fillers, combined with blowing agents and binders to create controlled pore structures. Results show that finer filler sizes produce smaller pore diameters and higher porosity, leading to improved sound absorption performance, with absorption coefficients ranging from 50% to 90%, particularly at frequencies above 2000 Hz. The highest absorption, near 90%, was achieved with 1 g of the smallest filler size (212 µm), and the experimental findings align well with theoretical models based on the Johnson-Champoux-Allard formulation. This study suggests that porous ceramic composites with natural fiber waste can serve as environmentally friendly and effective sound absorber materials suitable for harsh environments.