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    Effect of agro-waste pore formers on the microstructure, hardness, and tensile properties of porous alumina ceramics
    (Wiley, 2018) Dele-Afolabi, Temitope; Ariff, Azmah Hanim Mohamed; Mazlan, Norkhairunnisa; Sobri, Shafreeza; Çalın, Recep; Nur, Ismarrubie Zahari
    This study demonstrates a simple and economically viable approach to fabricate porous alumina ceramics shaped with low-priced natural organic pore-forming agents (PFAs) from rice husk (RH) and sugarcane bagasse (SCB) of various weight contents using the powder metallurgy method. Experimental findings revealed that the total porosity (44-67vol%) and average pore size (70-178m) maintained a linear relationship with rising PFA inclusion. Using the diametral compression test, the mechanical response of porous alumina samples was evaluated as a function of porosity and pore geometry. From the overall mechanical strength characterization, the susceptivity of strength on porosity became well marked as the agro-waste shaped porous ceramics exhibited hardness, tensile strength, and elastic modulus of 529.1-26HV, 20.4-1.5MPa and 1662-57MPa, respectively. Moreover, the fractography of the RH and SCB graded porous alumina samples was evaluated as a function of the respective microstructural features. With a plausible tradeoff between pore interconnectivity and mechanical strength, recommended areas of application include solid oxide fuel cells (SOFCs) design, filtration, and thermal insulation systems.
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    Fabrication Methods and Characterization Techniques for Porous Ceramic Materials
    (Elsevier, 2021) Dele-Afolabi, Temitope T.; Hanim, Mohamed A.A.; Mazlan, Norkhairunnisa; Sobri, Shafreeza; Calin, Recep; Ojo-Kupoluyi, Oluwatosin J.
    Porous ceramic materials with hierarchical pores and tailored porosity offer remarkable advantages in broad-based applications such as thermal insulation, fluid filtration, waste water treatment and others. So far, researchers and industrial experts have successfully developed porous ceramic systems using different processing technologies. More so, various characterization techniques have been utilized over the years to evaluate the physical and mechanical properties of porous ceramic materials. This work intends to document the different categories of fabrication methods as well as requisite standards necessary for the characterization of porous ceramic materials. © 2021 Elsevier Ltd. All rights reserved.