Arias-Serrano, Blanca I.

Pinto, Rui G.

Yaremchenko, Aleksey A.

Repositório Institucional da Universidade de Aveiro

 ECXV, July 7th-9th 2021, VITORIA-GASTEIZ   Pag. 1  SCIENTIFIC PROGRAMME XV Reunión Nacional de Electrocerámica Vitoria-Gasteiz 7-9 July 2021  ECXV, July 7th-9th 2021, VITORIA-GASTEIZ   Pag. 11 Posters P01 Co-sintering of LSM-YSZ and Ni-YSZ electrodes and YSZ electrolytes via fused filament fabrication —  J.C. Pérez-Flores, M. Castro-García, J.F. Valera-Jiménez, J.R. Marín-Rueda, J. Canales-Vázquez  P02 Sr4Mn2CuO9 black wide band semiconductors with high NIR reflectance prepared by gel methods —       G. Monrós, S. Cerro, M. Llusar, J.A. Badenes  P03 Ionic-electronic transport in zircon-type PrVO4-based ceramics — R.G. Pinto, B.I. Arias-Serrano,        A.A. Yaremchenko  P04 Hierarchically micro/mesoporous silicon oxycarbide derived materials as electrodes for energy storage storage applications — M.A. Mazo, M.T. Colomer, A. Tamayo, J. Rubio  P05 Pyrochlore-type Y2Ti2O7-based titanates as buffer layer materials for fuel-assisted solid oxide electrolysis cells — A.D. Bamburov, A.A. Yaremchenko  P06 Phase composition, poling and functional properties of Ba0.85Ca0.15Ti0.9Zr0.1O3 ceramics — C.E. Ciomaga, L.P. Curecheriu, A.V. Lukacs, M. L´hereux, M.H. Chambrier, R. Desfeux, L. Mitoseriu  P07 Magnetoelectric studies of (Ba,Ca)(Zr,Ti)O3—(Ni,Zn)Fe2O4 multiferroic composites — I. Coondoo,          A. Kholkin  P08 Functional properties in BaTiO3-CoFe2O4 composites: modelling and experimental validation —              L. Padurariu, C.E. Ciomaga, M. Airimioaei, L. Curecheriu, L. Mitoseriu  P09 Monte Carlo simulation of vacancies produced in lead-free piezo-ceramics by X-ray radiation damage — O. López-López, M.E. Montero-Cabrera, L. Pardo, R. Domínguez-García, L. Fuentes Cobas  P10 Synthesis, ceramic processing and properties of Bi3Ti1-2xNb1+xFexO9 with 0 ≤ x ≤ 0.5 — A. Barreto,        M. Algueró, R.P. del Real, A. Castro  P11 Post-annealing temperature effect on the structure and microstructure of K0.5Na0.5NbO3-BiFeO3 eco-piezoceramics prepared by spark plasma sintering — A. Iacomini, G. Mulas, S. Enzo, S. Garroni,         J.F. Bartolomé, L. Pardo   P12 Nanoscale piezoelectric properties and phase separation in pure and La-doped BiFeO3 films prepared by modified sol-gel technique — S. Kopyl, A.V. Semchenko, V.V. Sidsky, I. Bdikin, V.E. Gaishun,            D.L. Kovalenko, S.A. Khakhomov, A.L. Kholkin  P13 Photochemistry strategies to prepare flexible BiFeO3 thin films by low-temperature solution methods — A. Gómez-López, R. Jiménez. I. Bretos, J. Ricote, Y. andrea Rivas, R. Sirera, M.L. Calzada  P14 Low-temperature processed ferroelectric BiFeO3-based perovskite thin films by chemical solution deposition aided by photochemistry — Y. Andrea Rivas, A. Gómez-López, I. Bretos, R. Jiménez, J. Ricote, R. Sirera, M.L. Calzada   Pag. 64  ECXV, July 7th-9th 2021, VITORIA-GASTEIZ P—03   Ionic-electronic transport in zircon-type PrVO4-based ceramics  Rui G. Pinto1, Blanca I. Arias-Serrano1,2, Aleksey A. Yaremchenko1  1 CICECO - Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal 2 Leibniz Institute for Plasma Science and Technology, 17489 Greifswald, Germany  email: ruigpinto@ua.pt  LnVO4 orthovanadates attract attention as prospective materials for electrochemical applications, in particular, as redox-reversible electrode components for solid oxide fuel cells (SOFC).1,2 One important advantage of LnVO4-derived components of SOFC anodes is their prospective good resistance to carbon deposition and sulphur-containing impurities which is critical for hydrocarbon-fueled SOFCs. The present work was focused on the impact of the acceptor-type substitution by calcium on the electrical transport properties of zircon-type orthovanadate PrVO4 under oxidizing conditions.  Undoped PrVO4 and calcium-substituted Pr1-xCaxVO4-δ (x = 0.02-0.20) were prepared by conventional solid state route and sintered at 1300°C for 5h in air. The prepared materials were characterized by X-ray and neutron diffraction, SEM/EDS, thermal analysis, and measurements of electrical properties in controlled atmospheres. XRD demonstrated the formation of phase-pure solid solutions with tetragonal zircon-type structure for up to 5 at. % of calcium in Pr sublattice, while SEM/EDS suggest a lower solubility due to the presence of Ca-V-O phase impurities. Pr(Ca)VO4 ceramics showed semiconducting behavior under oxidizing conditions at 400-900°C. Within the solubility range, doping with calcium increases the total conductivity. The ionic and electronic contributions at 700-900°C were assessed by the modified e.m.f. technique. The electronic conductivity is p-type and decreases with decreasing p(O2). At lower temperatures, the total conductivity was found to be higher in wet atmospheres compared to dry conditions, thus implying a significant contribution of protonic transport at temperature below 550°C. The redox behavior of PrVO4-based ceramics on isothermal cycling between air and 10%H2-N2 was studied by impedance spectroscopy, thermogravimetry and XRD analysis.    References:  1 L. Adijanto, V.B. Padmanabhan, R. Küngas, R.J. Gorte, J.M. Vohs, J. Mater. Chem. 22 (2012) 11396.  2 E.V. Tsipis, M.V. Patrakeev, V.V. Kharton, N.P. Vyshatko, J.R. Frade, J. Mater. Chem. 12 (2002) 3738.   

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Ionic-electronic transport in zircon-type PrVO4-based ceramics

https://ria.ua.pt/bitstream/10773/31788/1/ECXV%282021%29_abstract%20P-03.pdf

Ionic-electronic transport in zircon-type PrVO4-based ceramics

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