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Study of intergranular phenomena in ceramic materials


The analyses of ceramic interfaces of oxides will be performed by the electrochemical impedance spectroscopy technique over wide frequency (5 Hz - 110 MHz), temperature (78 K - 1600 K), and partial pressure of oxygen (10 ppm - 1 atm) ranges. Several ceramic oxides, synthesized through chemical techniques, to be sintered under different experimental procedures, have been chosen due to their importance for the development of electroceramic devices. The analysis of pre-sintered powders will be performed by helium picnometry, gas adsorption (BET), X-ray diffraction (XRD) , and Fourier Transform Infrared Spectroscopy (FTIR) for physical and chemical evaluation of the powders. The microstructural analysis of sintered specimens will be carried out by X-ray diffraction, Raman spectroscopy and Scanning Electron Microscopy to look for correlations between microstructural and electrochemical impedance spectroscopy (EIS) results in thick pellets (0.5 - 5.0 um) and in films (0.1 - 100 um). Sintering will be carried out according to the following procedures: sintering under controlled atmosphere, fast firing sintering, two-step sintering, and liquid phase sintering using low melting point sintering aids. The following oxide compounds will be studied: zirconia and ceria based ionic conductors, barium and strontium cerate based proton conductors, and rare-earth manganite electron conductors. All these materials have in common their potential application in the development of two main kinds of devices: chemical species sensors and actuators, and oxide fuel cells for the clean production of electrical energy. The analysis of ceramic interfaces by EIS for determining blocking, frequency and capacitance factors, and the intergranular potential energy barriers, will help to establish correlations between intergranular phenomena and microstructure. This understanding will be used for the elaboration of experimental procedures for preparing ionic, protonic and electronic conducting oxides with optimized physical properties for best performance sensors and fuel cell devices. The project will take advantage of the experimental facilities and expertise of three laboratories of the University of S. Paulo: at IPEN for powder synthesis, microstructural analysis and impedance spectroscopy measurements, at EPUSP for powder synthesis and physical and chemical analysis of ceramic powders, and at IFUSP for powder synthesis and determination of the transport properties of Polycrystalline oxides. (AU)

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Scientific publications (43)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
EDUARDO CAETANO CAMILO DE SOUZA; REGINALDO MUCCILLO. Properties and applications of perovskite proton conductors. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 13, n. 3, p. 385-394, . (05/53241-9)
MUCCILLO, R.. Impedance spectroscopy analysis of zirconia:8 mol% yttria solid electrolytes with graphite pore former. Journal of Materials Research, v. 24, n. 5, p. 1780-1784, . (05/53241-9)
SOUZA‚ JA; NEUMEIER‚ JJ; JARDIM‚ RF. Effect of disorder on the thermodynamic phase transition in La0. 70Ca0. 30MnO3. Physical Review B, v. 75, p. 012412, . (05/53241-9)
MUCCILLO, R.; MUCCILLO, E. N. S.. An experimental setup for shrinkage evaluation during electric field-assisted flash sintering: Application to yttria-stabilized zirconia. Journal of the European Ceramic Society, v. 33, n. 3, p. 515-520, . (05/53241-9, 98/14324-0)
CASTRO, RICARDO H. R.; RUFNER, JORGEN; HIDALGO, PILAR; GOUVEA, DOUGLAS; COAQUIRA, JOSE A. H.; VAN BENTHEM, KLAUS. Surface Segregation in Chromium-Doped Nanocrystalline Tin Dioxide Pigments. Journal of the American Ceramic Society, v. 95, n. 1, p. 170-176, . (05/53241-9)
BARBETA, V. B.; JARDIM, R. F.; TORIKACHVILI, M. S.; ESCOTE, M. T.; CORDERO, F.; PONTES, F. M.; TREQUATTRINI, F.. Metal-insulator transition in Nd1-x Eu-x NiO3 probed by specific heat and anelastic measurements. Journal of Applied Physics, v. 109, n. 7, . (05/53241-9)
MUCCILLO, R.; CARMO, J. R.. Electrical conductivity of Ca1-xSrxTi0.65Fe0.35O3-delta, x=0, 0.5 and 1, polycrystalline compounds in the 300-500 K range. Materials Research Bulletin, v. 47, n. 5, p. 1204-1211, . (05/53241-9, 98/14324-0)
SERBENA, FRANCISCO C.; ZANOTTO, EDGAR D.. Internal residual stresses in glass-ceramics: A review. Journal of Non-Crystalline Solids, v. 358, n. 6-7, p. 975-984, . (05/53241-9, 07/08179-9)
GARCIA-FORNARIS, I.; GOVEA-ALCAIDE, E.; ALBERTERIS-CAMPOS, M.; MUNE, P.; JARDIM, R. F.. Transport Barkhausen-like noise in uniaxially pressed Bi1.65Pb0.35Sr2Ca2Cu3O10+delta ceramic samples. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, v. 470, n. 15-16, p. 611-616, . (05/53241-9)
SENE, FRANK F.; MARTINELLI, JOSE R.; OKUNO, EMICO. Synthesis and characterization of phosphate glass microspheres for radiotherapy applications. Journal of Non-Crystalline Solids, v. 354, n. 42-44, p. 4887-4893, . (05/53241-9)
COSTA, G. C. C.; MUCCILLO, R.. Synthesis of lanthanum beta-alumina powders by the polymeric precursor technique. CERAMICS INTERNATIONAL, v. 34, n. 7, p. 1703-1707, . (05/53241-9, 99/10798-0)
CAPRONI, E.; GOUVEA, D.; MUCCILLO, R.. Yttria-stabilized zirconia closed end tubes prepared by electrophoretic deposition. CERAMICS INTERNATIONAL, v. 37, n. 1, p. 273-277, . (05/53241-9)
GARCIA-FORNARIS, I.; MUNE, P.; SUZUKI, P. A.; ALBERTERIS-CAMPOS, M.; JARDIM, R. F.; GOVEA-ALCAIDE, E.. Experimental and theoretical study of transport properties in uniaxially pressed (Bi, Pb)(2)Sr2Ca2Cu3O10+delta ceramic samples. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, v. 470, n. 4, p. 269-276, . (05/53241-9)
ZENATTI, A.; QUEIRUGA REY, J. F.; LANFREDI, A. C.; LEITE, E. R.; LONGO, E.; ESCOTE, M. T.. LaNiO3 Nanotubes Produced Using a Template-Assisted Method. Journal of Nanoscience and Nanotechnology, v. 14, n. 6, p. 4431-4436, . (05/53241-9)
S. L. M. BRITO; D. GOUVÊA. Caracterização superficial de nanopartículas de BaTiO3 preparado pelo método dos precursores poliméricos. Cerâmica, v. 56, n. 339, p. 228-236, . (05/53241-9)
S. L. M. BRITO; D. GOUVÊA. Obtenção de BaTiO3 livre de resíduos de carbonato de bário pelo método dos precursores poliméricos. Cerâmica, v. 57, n. 343, p. 338-347, . (05/53241-9)
A. MATIOLI; J. MIAGAVA; D. GOUVÊA. Modificação da estabilidade dos polimorfos de TiO2 nanométrico pelo excesso de superfície de SnO2. Cerâmica, v. 58, n. 345, p. 53-57, . (05/53241-9)
D. GOUVÊA; R. H. R. CASTRO; G. J. PEREIRA. Quantificação da segregação de MgO em pós nanométricos de SnO2 preparados por método químico. Cerâmica, v. 55, n. 336, p. 393-399, . (05/55335-0, 05/53241-9)
I. GARCÍA-FORNARIS; E. GOVEA- ALCAIDE; P. MUNÉ; R.F. JARDIM. Intergranular properties of uniaxially pressed YBa2Cu3O7-δ ceramic samples. REVISTA MEXICANA DE FISICA, v. 56, n. 1, p. 40-43, . (05/53241-9)
J. M. FERREIRA JR.; O. C. CORDEIRO; Y. V. FRANÇA; E. N. S. MUCCILLO; J. R. MATOS; R. MUCCILLO. Análise térmica e caracterização elétrica de materiais cerâmicos com comportamento termistor à base de óxidos de manganês, de níquel e de cobalto. Cerâmica, v. 53, n. 328, p. 448-454, . (05/53241-9)
CASTRO, RICARDO H. R.; KODAMA, PAULO K.; GOUVEA, DOUGLAS; MUCCILLO, R.. Electrophoretic deposition of ZrO2-Y2O3: a bi-component study concerning self-assemblies. Journal of Materials Science, v. 44, n. 7, p. 1851-1857, . (05/53241-9, 05/55335-0)
SOUZA, J. A.; JARDIM, R. F.. Electrical transport in disordered and ordered magnetic domains under pressures and magnetic fields. JOURNAL OF PHYSICS D-APPLIED PHYSICS, v. 42, n. 3, . (05/53241-9)
RAMIREZ, F. E. N.; CUNHA, B. B.; ALVES, W. A.; JARDIM, R. F.; MUCCILLO, R.; SOUZA, J. A.. Structural, electronic, and magnetic entropy contributions of the orbital order-disorder transition in LaMnO3. PHASE TRANSITIONS, v. 84, n. 3, p. 284-290, . (05/53241-9)
GARCIA-FORNARIS, I.; PLANAS, A. A.; MUNE, P.; JARDIM, R. F.; GOVEA-ALCAIDE, E.. Temperature Dependence of the Intergranular Critical Current Density in Uniaxially Pressed Bi1.65Pb0.35Sr2Ca2Cu3O10+delta Samples. Journal of Superconductivity and Novel Magnetism, v. 23, n. 8, p. 1511-1516, . (05/53241-9)
COSTA, G. C. C.; MUCCILLO, R.. High-temperature electrical properties of lanthanum beta-alumina solid electrolytes. CERAMICS INTERNATIONAL, v. 35, n. 1, p. 467-470, . (98/14324-0, 05/53241-9)
MASUNAGA‚ SH; JARDIM‚ RF; FICHTNER‚ PFP; RIVAS‚ J.. Role of dipolar interactions in a system of Ni nanoparticles studied by magnetic susceptibility measurements. Physical Review B, v. 80, n. 18, p. 184428, . (05/53241-9)
CAMILO DE SOUZA, EDUARDO CAETANO; MUCCILLO, REGINALDO. Properties and Applications of Perovskite Proton Conductors. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 13, n. 3, p. 385-394, . (05/53241-9)
NETO, JONAS JAKUTIS; MOURA, TIAGO DOS SANTOS; DA SILVA, FERNANDO RODRIGUES; BALDOCHI, SONIA LICIA; WETTER, NIKLAUS URSUS. Lasing of a single crystal Nd3+ fluoride fiber. Optics Communications, v. 283, n. 18, p. 3487-3491, . (05/53241-9)
CIPRIANO, T. C.; TAKAHASHI, P. M.; DE LIMA, D.; OLIVEIRA, JR., V. X.; SOUZA, J. A.; MARTINHO, H.; ALVES, W. A.. Spatial organization of peptide nanotubes for electrochemical devices. Journal of Materials Science, v. 45, n. 18, p. 5101-5108, . (05/53241-9, 08/57805-2)
COSTA, G. C. C.; MUCCILLO, R.. Comparative studies on properties of scandia-stabilized zirconia synthesized by the polymeric precursor and the polyacrylamide techniques. Journal of Alloys and Compounds, v. 503, n. 2, p. 474-479, . (05/53241-9)
PRISON, J. M.; MARTINELLI, J. R.; SENE, F. F.; BERGO, P.. Crystallization of barium magnesium phosphate glasses determined by differential thermal analysis and X-rays diffraction. Journal of Non-Crystalline Solids, v. 354, n. 42-44, p. 4723-4726, . (05/53241-9)
GARCIA-FORNARIS, I.; GOVEA-ALCAIDE, E.; MUNE, P.; JARDIM, R. F.. Intergranular properties of uniaxially pressed YBa2Cu3O7-delta ceramic samples. REVISTA MEXICANA DE FISICA, v. 56, n. 1, p. 40-43, . (05/53241-9)
GOUVEA, DOUGLAS; USHAKOV, SERGEY V.; NAVROTSKY, ALEXANDRA. Energetics of CO2 and H2O Adsorption on Zinc Oxide. Langmuir, v. 30, n. 30, p. 9091-9097, . (05/53241-9, 11/02080-6)
MUCCILLO, R.; MUCCILLO, E. N. S.. Electric field-assisted flash sintering of tin dioxide. Journal of the European Ceramic Society, v. 34, n. 4, p. 915-923, . (05/53241-9)
R. H. R. CASTRO; P. HIDALGO; D. GOUVEA; A. NAVROTSKY. Determinação das energias de superfície do SnO2 puro e dopado. Cerâmica, v. 55, n. 336, p. 342-348, . (05/55335-0, 05/53241-9)
SERBENA, FRANCISCO C.; SOARES, VIVIANE OLIVEIRA; PEITL, OSCAR; PINTO, HAROLDO; MUCCILLO, REGINALDO; ZANOTTO, EDGAR D.. Internal Residual Stresses in Sintered and Commercial Low Expansion Li2O-Al2O3-SiO2 Glass-Ceramics. Journal of the American Ceramic Society, v. 94, n. 4, p. 1206-1214, . (05/53241-9, 07/08179-9)
BARBETA, V. B.; JARDIM, R. F.; KIYOHARA, P. K.; EFFENBERGER, F. B.; ROSSI, L. M.. Magnetic properties of Fe3O4 nanoparticles coated with oleic and dodecanoic acids. Journal of Applied Physics, v. 107, n. 7, . (05/53241-9)
GARCIA, S.; ANDRADE, S.; JARDIM, R. F.; FONSECA, F. C.; TORIKACHVILI, M. S.; LACERDA, A. H.. Logarithmic contribution to the electrical resistivity in (Ru1-xIrx)Sr2GdCu2O8 compounds. Physical Review B, v. 80, n. 13, . (05/53241-9)
MUCCILLO, R.; MUCCILLO, E. N. S.; KLEITZ, M.. Densification and enhancement of the grain boundary conductivity of gadolinium-doped barium cerate by ultra fast flash grain welding. Journal of the European Ceramic Society, v. 32, n. 10, p. 2311-2316, . (05/53241-9, 10/51293-0)
CAPRONI‚ E.; CARVALHO‚ FMS; MUCCILLO‚ R.. Development of zirconia-magnesia/zirconia-yttria composite solid electrolytes. Solid State Ionics, v. 179, n. 27, p. 1652-1654, . (05/53241-9)
SOUZA, J. A.; TERASHITA, H.; GRANADO, E.; JARDIM, R. F.; OLIVEIRA, JR., N. F.; MUCCILLO, R.. Polaron liquid-gas crossover at the orthorhombic-rhombohedral transition of manganites. Physical Review B, v. 78, n. 5, p. 054411, . (05/53241-9)

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