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Faradaic current in differnt mullite materials: single crystal, ceramic and cermets

AuthorsMata-Osoro, G. CSIC; Moya, J. S. CSIC; Morales, Miguel; Díaz, Luis A. CSIC ORCID; Schneider, Hartmut; Pecharromán, Carlos CSIC ORCID
Issue Date2012
PublisherCarl Hanser Verlag
CitationInternational Journal of Materials Research 103(4): 408-411 (2012)
AbstractFaradaic current measurements have been carried out on three different types of mullite: 2 : 1 mullite single crystals (E ¿ c), 3 : 2 ceramics and 11 % mullite/Mo composites. Measurements were carried out on very thin samples (60 µm) at high voltages (500 to 1 000 V). Under these conditions, measurable currents were recorded even at room temperature. Results indicate notable differences between these three samples, which suggest that, although they share the same name and similar crystalline structure, binding energies and defect distributions seem to be very different. Finally, it has been seen that the excellent behaviour against dielectric breakdown of ceramic mullite does not hold for single crystals or mullite based cermets.
Publisher version (URL)http://dx.doi.org/10.3139/146.110717
Identifiersdoi: 10.3139/146.110717
issn: 1862-5282
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(ICMM) Artículos
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