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Control of experimental conditions in reaction flash-sintering of complex stoichiometry ceramics

AuthorsGil-González, Eva; Perejón, Antonio ; Sánchez-Jiménez, P.E. ; Román-González, D.; Pérez-Maqueda, Luis A.
KeywordsReaction flash-sintering
Flash sintering
Bismuth iron oxide
Asite substituted bismuth iron oxide.
Issue Date2020
PublisherPergamon Press
CitationCeramics International (2020)
AbstractThe inherent potential of reaction flash-sintering for the preparation of complex oxides is evidenced by the one-step synthesis and densification of a ceramic of complex stoichiometry. The system BiLaFeO, a multiferroic ceramic with promising technological applications, has been chosen. This system presents three different metals in its composition and it is extremely challenging to prepare by conventional procedures. Non-stoichiometric materials with unwilling secondary phases are usually obtained by conventional methods, due to the high volatility of bismuth oxide at the temperatures required for inducing the solid-solid reactions. Here, it is demonstrated that a careful control of the experimental flash conditions (applied electric field and selected current density limit) is required to obtain a high quality ceramic. Small deviations from the optimum conditions result in either non-stoichometric or poorly densified samples.
Publisher version (URL)http://dx.doi.org/10.1016/j.ceramint.2020.05.091
Identifiersdoi: 10.1016/j.ceramint.2020.05.091
issn: 0272-8842
Appears in Collections:(ICMS) Artículos
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