Studies of oxygen transport mechanism in electrolytes based on doped lanthanum silicate with apatite structure using techniques of oxygen isotopic heteroexchange and impedance spectroscopy

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dc.contributor.author Sadykov, VA en
dc.contributor.author Kharlamova, TS en
dc.contributor.author Mezentseva, NV en
dc.contributor.author Pavlova, SN en
dc.contributor.author Sadovskaya, EM en
dc.contributor.author Muzykantov, VS en
dc.contributor.author Bespalko, YuN en
dc.contributor.author Usol'Tsev, VV en
dc.contributor.author Zevak, EG en
dc.contributor.author Kriger, TA en
dc.contributor.author Ishchenko, AV en
dc.contributor.author Uvarov, NF en
dc.contributor.author Ulikhin, AS en
dc.contributor.author Chaikina, MV en
dc.contributor.author Argirusis, C en
dc.date.accessioned 2014-03-01T02:47:28Z
dc.date.available 2014-03-01T02:47:28Z
dc.date.issued 2011 en
dc.identifier.issn 1023-1935 en
dc.identifier.uri http://hdl.handle.net/123456789/33169
dc.subject doped lanthanum silicate with an apatite structure en
dc.subject impedance spectroscopy en
dc.subject isotopic oxygen heteroexchange en
dc.subject mechanism en
dc.subject oxygen conductivity en
dc.subject solid electrolytes en
dc.subject.classification Electrochemistry en
dc.subject.other Apatite structures en
dc.subject.other Co-doped en
dc.subject.other Doped lanthanum silicate en
dc.subject.other impedance spectroscopy en
dc.subject.other Isotopic oxygen en
dc.subject.other Lanthanum silicates en
dc.subject.other Lower energies en
dc.subject.other Migration process en
dc.subject.other Optimum composition en
dc.subject.other Oxygen atom en
dc.subject.other Oxygen diffusion en
dc.subject.other Oxygen isotopic en
dc.subject.other Oxygen mobility en
dc.subject.other Oxygen transport en
dc.subject.other Activation energy en
dc.subject.other Apatite en
dc.subject.other Doping (additives) en
dc.subject.other Gadolinium en
dc.subject.other Isotopes en
dc.subject.other Lanthanum en
dc.subject.other Lanthanum alloys en
dc.subject.other Silicates en
dc.subject.other Solid electrolytes en
dc.subject.other Oxygen en
dc.title Studies of oxygen transport mechanism in electrolytes based on doped lanthanum silicate with apatite structure using techniques of oxygen isotopic heteroexchange and impedance spectroscopy en
heal.type conferenceItem en
heal.identifier.primary 10.1134/S1023193511040136 en
heal.identifier.secondary http://dx.doi.org/10.1134/S1023193511040136 en
heal.language English en
heal.publicationDate 2011 en
heal.abstract The work presents the results of studying the mechanism of oxygen transport for a new promising class of oxygen-containing electrolytes based on lanthanum silicate with an apatite structure using impedance spectroscopy and isotopic oxygen heteroexchange. At 1000 K, in the case of samples with an optimum composition including codoped Fe and Al, sigma similar to 3 x 10(-3) to 10(-2) S/cm and D* reaches similar to 10(-8) cm(2)/s, which is close to the values of YSZ and Ce0.9Gd0.1O2-(delta) (GDC). Lower energies of conductivity activation and oxygen diffusion for doped apatites (similar to 0.5-0.8 eV instead of similar to 1 eV for GDC) and also equivalence as regards exchange of all oxygen atoms within apatite agree with the model, in which oxygen mobility is determined by a nonlinear cooperative migration process of oxygen atoms with fast exchange between interstitial and regular sites. en
heal.journalName Russian Journal of Electrochemistry en
dc.identifier.doi 10.1134/S1023193511040136 en
dc.identifier.isi ISI:000292270800009 en
dc.identifier.volume 47 en
dc.identifier.issue 4 en
dc.identifier.spage 427 en
dc.identifier.epage 441 en

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