Rice Husk as a Pore-Forming Agent: Impact of Particle Size on the Porosity and Diametral Tensile Strength of Porous Alumina Ceramics

This study describes the porosity and particle size effects of rice husk pore former on diametral tensile strength porous alumina (Al2O3) ceramics. Porous Al2O3 ceramics with high sufficient were successfully prepared by pore-forming agent method using (RH) as according to sample formulation Al2O3-xRHy (where ‘x’ denotes range in µm ‘y’ percent weight content (wt%) RH). The thermogravimetric analysis (TGA) X-ray diffractometer (XRD) results revealed that silica was retained ash developed after decomposition starting former. Microstructures as-prepared having different RH additions exhibited hierarchical structures increased agent. Porosity larger where Al2O3-63RH5 demonstrated least (44.2 vol%), while highest (70.9 vol%) Al2O3-125–250RH20. RH-shaped declined from 16.97 0.65 MPa husk.