Processing of highly-porous cellular iron oxide-based ceramics by emulsification of ceramic suspensions

authors	Lopes, DV; Kovalevsky, AV; Quina, MJ; Frade, JR
nationality	International
journal	CERAMICS INTERNATIONAL
author keywords	Cellular ceramics; Designed porosity; Emulsification; Hematite; Magnetite
keywords	ALPHA-FE2O3; PARAMETERS; REDUCTION; MONOLITHS; HEMATITE; SPINELS; DESIGN
abstract	Iron oxides are attractive for a variety of applications, since they offer unique physical and chemical properties, while being abundant and environmentally friendly. Some of those potential applications, including electrochemical and catalytic systems, require ceramics with designed porosity and well-developed percolation networks. In the present work, representative Al- and Mg-substituted hematite and magnetite- based cellular ceramics were processed by emulsification of mixed oxide suspensions. Reactive firing conditions were adjusted to attain a reasonable compromise between designed porosity, percolation and phase composition. The impact of firing conditions on the cellular ceramics microstructure, porosity, phase content and interconnectivity of the cells was studied and discussed. Thus, the applicability of the proposed emulsification of ceramic suspensions method was demonstrated for iron oxide-based ceramics.
publisher	ELSEVIER SCI LTD
issn	0272-8842
year published	2018
volume	44
issue	16
beginning page	20354
ending page	20360
digital object identifier (doi)	10.1016/j.ceramint.2018.08.024
web of science category	Materials Science, Ceramics
subject category	Materials Science
unique article identifier	WOS:000447101500167