Materials for SOFC & related technologies
D. Pérez-Coll, P. Núñez, J.R. Frade, Effect Of Samarium-Content On Onset Of Minor P-Type Conductivity In Ceria-Based Electrolytes, J. Power Sources, 227 (2013) 145-152
D.Perez-Coll, A.Aguadero, P.Nunez, J.R.Frade, “Mixed transport properties of Ce1-xSmxO2-x/2 in fuel cell operating conditions, Int. J. Hydrogen Energy, 35 (2010 11448-11455
T.Carvalho, E.Antunes, J.Calado, F.M.Figueiredo, J.R. Frade, “Lanthanum oxide as a scavenging agent for zirconia electrolytes”, Solid State Ionics, 225 (2012) 484-7
Coll DP, Nunez P, Ruiz-Morales JC, Martinez JP, Frade JR, Re-examination of bulk and grain boundary conductivities of Ce1-xGdxO2-d ceramics, Electrochimica Acta, 52 (2007) 2001-8
Tsipis EV, Kharton VV, Frade JR, Electrochemical behavior of mixed-conducting oxide cathodes in contact with apatite-type La10Si5AlO26.5 electrolyte, Electrochimica Acta 52 (13): 4428-4435 MAR 20 2007
D.P.Coll, D.M.Lopez, P.Nunez, S.Piñol, J.R.Frade, Grain boundary conductivity of Ce0.8Ln0.2O2-d ceramics (Ln=Y,La,Gd,Sm) with and without Co-doping, Electrochimica Acta, 51 (2006) 6463-9
D.P.Coll, P.Nuñez, J.C.C.Abrantes, D.P.Fagg, V.V.Kharton, J.R.Frade, Effects of firing conditions and addition of Co on bulk and grain boundary properties of CGO, Solid State Ionics, 176 (2005) 2799-2805
Kharton VV, Tsipis EV, Yaremchenko AA, Frade JR, “Surface-limited oxygen transport and electrode properties of La2Ni0.8Cu0.2O4+delta”, Solid State Ionics, 166 (2004) 327-37.
G.C.Mather, F.M.Figueiredo, J.R.Jurado, J.R.Frade, “Synthesis and characterisation of cermet anodes for SOFCs with a proton-conducting ceramic phase”, Solid State Ionics, 162 (2003) 115-120
D.Perez-Coll, P.Nuñez, J.R.Frade, J.C.C.Abrantes, “Conductivity of CGO and CSO ceramics obtained from freeze dried precursors”, Electrochimica Acta, 48 (2003) 1551-7
D.P. Fagg, J.C.C. Abrantes, D. Perez-Coll, P. Nunez, V.V. Kharton and J.R. Frade, The effect of cobalt oxide sintering aid on electronic transport in Ce0.80Gd0.20O2-d electrolyte, Electrochimica Acta, 48 (2003) 1023-9
A.Ringuedé, D.Bronine, J.R.Frade, “Assessment of Ni/YSZ anodes prepared by combustion synthesis”, Solid State Ionics, 146 (2002) 219-24
A.Ringuedé, D.Bronine, J.R.Frade, “Alternative Ni1-xCox/YSZ anodes for solid oxide fuel cells”, Electrochimica Acta, 48 (2002) 437-42
V.V.Kharton, F.M.Figueiredo, L.Navarro, E.N.Naumovich, A.V.Kovalevsky, A.A.Yarenchenko, A.P.Viskup, A.Carneiro, F.M.B.Marques, J.R.Frade, “Ceria based materials for solid oxide fuel cells”, J. Mat. Sci., 36 (2001) 1105-17
A.Ringuedé, J.A.Labrincha, J.R.Frade, “A combustion synthesis method to obtain alternative cermet materials for SOFC anodes”, Solid State Ionics, 141/2 (2001) 549-57
D.P.Fagg, V.V.Kharton, A.V.Kovslevsky, A.P.Viskup, E.N.Naumovich, J.R.Frade, “The stability and mixed conductivity in La and Fe doped SrTiO3 in the search for potential SOFC anode materials”, J. Eur. Ceram. Soc., 21 (2001) 1831-5
F.M.Figueiredo, J.R.Frade, F.M.B.Marques, “Performance of composite LaCoO3+La2(Zr,Y)2O7 cathodes” , Solid State Ionics., 135 (2000) 463-7
J.A.Labrincha, F.M.B.Marques, J.R.Frade, "La2Zr2O7 Formed at Ceramic Electrode/YSZ Contacts", J. Mat. Sci. 28 (1993) 3809
Membranes for oxygen separation & syngas
A.A.Yaremchenko, C.Buysse, V.Middelkoop, F.Snijkers, A.Buekenhoudt, J.R.Frade, A.V.Kovalevsky. Impact of sulphur contamination on the oxygen transport mechanism through Ba0.5Sr0.5Co0.8Fe0.2O3-d: relevant issues in the development of capillary and hollow fibre membrane geometry. J. Membrane. Sci., 428 (2013) 123
A.Kovalevsky, A.Yaremchenko, V.Kolotygin, A.Shaula, V.Kharton, F.Snijkers, A.Buekenhoudt J.R.Frade, E.Naumovich, Processing and oxygen permeation studies of asymmetric multilayer Ba0.5Sr0.5Co0.8Fe0.2O3-d membranes, J Membrane. Sci., 380 (2011) 68
D.P.Fagg, S.Garcia-Martin, V.V.Kharton, J.R.Frade Transport properties of fluorite-type Ce0.8Pr0.2O2-d: Optimization via the use of cobalt oxide sintering aid", Chem. Mater, 21 (2009) 381
Fagg DP, Shaula AL, Kharton VV, Frade JR, High oxygen permeability in fluorite-type Ce0.8Pr0.2O2-d via the use of sintering aids, J Membrane Sci, 299 (2007) 1
Kharton VV, Kovalevsky AV, Avdeev M, Tsipis EV, Patrakeev MV, Yaremchenko AA, Naumovich EN, Frade JR, Chemically induced expansion of La2NiO4+d-based materials, Chem. Mat. 19 (2007) 2027
A.V.Kovalevsky, V.V.Kharton, F.Maxim, A.L.Shaula and J.R.Frade, Processing and characterization of La0.5Sr0.5FeO3-supported Sr1-xFe(Al)O3-SrAl2O4 composite membranes, J.Membrane Sci., 278(2006)162
V.V. Kharton, A.L. Shaula, F.M.M. Snijkers, J.F.C. Cooymans, J.J. Luyten, A.A. Yaremchenko, A.A. Valente, E.V. Tsipis, J.R. Frade, F.M.B. Marques and J. Rocha, Processing, stability and oxygen permeability of Sr(Fe,Al)O3-based ceramic membranes, J. Membrane Sci., 252 (2005) 215
V.V. Kharton, A.A. Yaremchenko, A.A. Valente, V.A. Sobyanin, V.D. Belyaev, G.L. Semin, S.A. Veniaminov, E.V. Tsipis, A.L. Shaula, J.R. Frade and J. Rocha, Methane oxidation over Fe-, Co-, Ni- and V-containing mixed conductors, Solid State Ionics, 2005, vol. 176, pp. 781
Kharton VV, Yaremchenko AA, Tsipis EV, Valente AA, Patrakeev MV, Shaula AL, Frade JR, Rocha, “Characterization of mixed-conducting La2Ni0.9Co0.1O4+delta membranes for dry methane oxidation”, Applied Catalysis A- General, 261 (2004), 25
F.M.Figueiredo, V.V.Kharton, A.P.Viskup, J.R.Frade, “Surface enhanced oxygen permeation in CaTi1-xFexO3-d ceramic membranes”, J. Membrane Sci., 236 (2004) 73
V.V.Kharton, A.A.Yaremchenko, A.L. Shaula, M.V.Patrakeev, E.N.Naumovich, D.I.Loginovich, J.R.Frade, F.M.B.Marques, “Transport properties and stability of Ni-containing mixed conductors with perovskite- and K2NiF4-type structure”, J. Solid State Chem., 177 (2004) 26
A.A. Yaremchenko, V.V. Kharton, M.V. Patrakeev and J.R. Frade, p-type electronic conductivity, oxygen permeability and stability of La2Ni0.9Co0.1O4+d, J. Mat. Chem., 13 (2003) 1136.
V.V.Kharton, A.V.Kovalevsky, E.V.Tsipis, A.P.Viskup, E.N.Naumovich, J.R.Jurado and J.R.Frade, Mixed conductivity and stability of A-site-deficient Sr(Fe,Ti)O3-d perovskites, Journal of Solid State Electrochemistry, 2002, vol.7, pp.30.
V.V.Kharton, A.P.Viskup, A.V.Kovalevsky, F.M.Figueiredo, J.R.Jurado, A.A.Yaremchenko, E.N.Naumovich, J.R.Frade, “Surface limited ionic transport in perovskites Sr0.97(Ti,Fe,Mg)O3-d”, J. Mat. Chem., 10 (2000) 1161
J.R.Jurado, F.M.Figueiredo, B.Gharbage, J.R.Frade, Electrochemical permeability of Sr0.97(Ti,Fe)3-d materials", Solid State Ionics, 118 (1999) 89
Solid state electrochemical methods
S.I.R.Costa, M.Li, J.R.Frade, D.C.Sinclair, Modulus spectroscopy of CaCu3Ti4O12 ceramics: clues to the internal barrier layer capacitance mechanism, RSC Advances, 3 (2013) 7030
A.L. Ferreira, A.L. Horovistiz, J.C.C. Abrantes, D. Pérez-Coll, P. Núñez, J.R. Frade, De-convolution of bulk and interfacial contributions based on impedance spectroscopy with external load resistance”, Mat. Res. Bull., 44 (2009) 884
J.R.Frade, V.V.Kharton, A.A. Yaremchenko, E.V.Tsipis, Applicability of emf measurements under external load resistance conditions for ion transport number determination, J. Sol. State Electrochem., 10 (2006) 96
V.V.Kharton, A.V.Kovalevsky, A.V.Viskup, F.M.Figueiredo, J.R.Frade, A.A.Yaremchenko, E.N.Naumovich, “Faradaic efficiency and oxygen permeability of Sr0.97Ti1-x FexO3-d perovskite”, Solid State Ionics, 128 (2000) 117
B.Gharbage, F.M.B.Marques, J.R.Frade, "Electrolyte changes by point contact electrodes on Sr(Zr,Dy)O3-d“, Solid State Ionics, 136/7 (2000) 933
J.R.Jurado, M.T.Colomer, J.R.Frade, “Caracterization of Sr0.97Ti1-x FexO3-d by impedance spectroscopy. Part I: Materiais with low Fe contents”, J. Amer. Ceram. Soc., 83 (2000) 2715
J.C.C.Abrantes, J.A.Labrincha, J.R.Frade, “Applicability of the brick layer model to describe the grain boundary properties of strontium titanate ceramics”, J. Eur. Ceram. Soc., 20 (2000) 1603
J.C.C.Abrantes, J.A.Labrincha, J.R.Frade, “Representations of impedance spectra of ceramics: Part I. Simulated study cases”, Mat. Res. Bull., 35 (2000) 965
J.C.C.Abrantes, J.A.Labrincha, J.R.Frade, “Representations of impedance spectra of ceramics: Part II. Spectra of polycrystalline SrTiO3”, Mat. Res. Bull., 35 (2000) 977
J.C.C.Abrantes, J.A.Labrincha, J.R.Frade, “An alternative representation of impedance spectra of ceramics”, Mat. Res. Bull, 35 (2000) 741
J.R.Frade, "Theoretical behaviour of concentration cells based on ABO3 perovskite materials with protonic and oxygen ion conduction", Solid State Ionics, 78 (1995) 87
R.M.C.Marques, F.M.B.Marques, J.R.Frade, "Characterization of mixed conductors by dc techniques. Part I: Theoretical solutions", Solid State Ionics, 73 (1994) 15
Solid state kinetics, thermodynamics & synthesis
J.F.Monteiro, A.A.L.Ferreira, I.Antunes, D.P.Fagg, J.R.Frade,“Thermodynamic restrictions on mechanosynthesis of strontium titanate, J. Sol. State Chem. 185 (2012) 143
Antunes I, Brandao A, Figueiredo FM, Frade JR, Gracio J, Fagg DP. Mechanosynthesis of nanopowders of the proton-conducting electrolyte material Ba(Zr, Y)O3-d, J Solid State Chem. 182 (2009) 2149
A.Brandão, J.F.Monteiro, A.V. Kovalevsky, D.P. Fagg, V.V.Kharton, J.R.Frade, “Guidelines for improving resistance to CO2 of materials for solid state electrochemical systems”, Solid State Ionics, 192 (2011) 16
J.R.Frade, V.V.Kharton, A.Yaremchenko, E.Naumovich, “Methane to syngas conversion: Part I: Equilibrium conditions and stability requirements of membrane materials”, J. Power Sources, 130 (2004) 77
J.R.Frade, V.V.Kharton, D.Marrero Lopez, P.Nunez, J.C.C.Abrantes, “Kinetics of phase transformation for constant heating rate occurring close to the thermodynamic transition”, Thermochimica Acta, 435 (2005) 84
E.V.Tsipis, V.V.Kharton, I.A.Bashmakov, E.N.Naumovich, J.R.Frade, “Cellulose precursor synthesis of nanocrystalline Ce0.8Gd0.2O2-d for SOFC anodes”, J. Solid State Electrochem., 8 (2004) 674
A.Ringuedé, J.R.Frade, J.A.Labrincha, “Combustion synthesis of zirconia-based cermet powders”, Ionics, 6 (2000) 273
A.L.Oliveira, M.Oliveira, R.N.Correia, M.H.F.V.Fernandes, J.R.Frade, "Crystallization of whitlockite from a glass in the system CaO.P2O5.SiO2.MgO, J. Amer. Ceram. Soc., 81 (1998) 3270
J.R.Frade, "Crystallization with variable temperature: Corrections for the activation energy", J. Amer. Ceram. Soc., 81 (1998) 2654
D.A.Fumo, J.R.Jurado, A.M.Segadães, J.R.Frade, "Combustion synthesis of iron substituted strontium titanate perovskites", Mat. Res. Bull., 32 (1997) 1459
J.R.Frade, M.Cable, "Numerical solutions for mixed control of powder reactions for spherical, cylindrical, or planar particles", J.Amer.Ceram. Soc., 78 (1995) 90.
J.R.Frade, M.Cable, "Reexamination of the basic theoretical Model for the Kinetics of solid state reactions", J. Amer. Ceram. Soc., 75 (1992) 1949
Materials for waste heat conversion & storage (thermoelectrics, PCM,…)
N.Vitorino, J.C.C.Abrantes, J.R.Frade, Gelled Graphite/Gelatin Composites For Latent Heat Cold Storage, Applied Energy, 104 (2013) 890
N.Vitorino, J.C.C.Abrantes, J.R.Frade, PCM/graphite composites with improved thermal and electrical response, Mat.Lett., 92 (2013) 100
N.Vitorino, J.C.C.Abrantes, J.R.Frade, Cellular ceramics processed by paraffin emulsified suspensions with collagen consolidation, Mat. Lett. 98 (2013) 120
N.Vitorino, J.C.C.Abrantes, J.R.Frade, “Numerical solutions for mixed controlled solidification of phase change materials” Int. J. Heat Mass Trans., 53 (2010) 5335
A.V. Kovalevsky, A.A. Yaremchenko, S. Populoh, A. Weidenkaff, J.R. Frade, Enhancement of thermoelectric performance in strontium titanate by praseodymium additions, J. Appl. Phys. 113 (2013) 053704.
Materials & catalysts for carbon lean technologies
J.F. Monteiro, J.Waerenborgh, A.Kovalevsky, A.Yaremchenko, J.R.Frade, Synthesis of Sr0.9K0.1FeO3d electrocatalysts by mechanical activation, J. Solid State Chem., 198 (2013) 169
N.M. Ferreira, A. Kovalsky, M.A. Valente, M.F. Costa, J. Frade, Magnetite/Hematite core/shell fibres grown by laser floating zone method, Appl. Surf. Sci., 278 (2013) 203
AV Kovalevsky, EN Naumovich, AA Yaremchenko, JR Frade, High-temperature conductivity, stability and redox properties of Fe3-xAlxO4 spinel-type materials, J. Eur. Ceram. Soc., 32 (2012) 3255
A.Yaremchenko, A.Kovalevsky, E.Naumovich, V.Kharton, J.Frade, High temperature electrical properties of magnesiowustite Mg1-xFexO and spinels Fe3-x-yMgxCryO4 ceramics, Solid State Ionics, 192 (2011) 252
Poznyak SK, Kharton VV, Frade JR, Yaremchenko AA, Tsipis, EV, Yakovlev SO, Marozau IP, “Behaviour of (La,Sr)CoO3 and La2NiO4-based ceramic anodes in alkaline media: Compositional and microstructural factors” J. Sol. State Electrochem., 12 (2008) 15