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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Pore size distribution and cumulative pore volume of the top and bottom parts of porous α-SiAlON samples fired at different conditions: (a): 1800 °C-1 h; (b): 1800 °C-2 h (c): 1900 °C-1 h and (d): 1900 °C-2 h.