EMILIA SATOSHI MIYAMARU SEO
19 resultados
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Artigo IPEN-doc 20195 Characterization of metallic zirconium sponge2015 - LIMA, SERGIO C.N. de; SOARES, EDSON P.; ANDREOLI, MARCO; CHIBA, RUBENS; SEO, EMILIA S.M.Artigo IPEN-doc 20130 Physical and microstructural characterization of cathode composite cathode and electrolyte ceramics to ITSOFC2014 - VARGAS, REINALDO A.; BONTURIM, EVERTON; ANDREOLI, MARCO; CHIBA, RUBENS; SEO, EMILIA S.M.The (La0.60Sr0.40)(Co0.20Fe0.80)O3-δ - LSCF, (Ce0.90Gd0.10)O1.95 - CGO composites and LSCF were deposited by wet powder spraying deposition method for the purpose of investigating their potential use in Intermediate Temperature Solid Oxide Fuel Cells. The interlayers are necessary between CGO electrolytes and LSCF cathodes in order to improve the performance of these materials. LSCF powders synthesized by citrate technique were calcined at 900 °C for 4 h and, their LSCFCGO composites and LSCF suspensions deposited on CGO substrate and, sintered in 1100 °C for 1 h, were formed pseudo-perovskite. The ceramics materials were analyzed by X-ray diffraction (XRD) and chemical composition of different half-cells layers by scanning electron microscope with energy dispersive (SEM-EDS). The results are in agreement with the literature and indicate that route studied is adequate for crystal structures formation compatible with films the 35 µm thick total for study of conductivity between the cathode and the electrolyte.Artigo IPEN-doc 09271 A mathematical model for silicon chlorination2003 - SEO, E.S.M.; BROCCHI, E.A.; CARVALHO, R.J.; SOARES, E.P.; ANDREOLI, M.Artigo IPEN-doc 04746 Obtencion de tetracloruro de circonio por la tecnica de cloracion en lecho fluidizado1996 - SEO, E.S.M.; SOUZA, O.C.; SILVA, L.C.E.; ANDREOLI, M.; PASCHOAL, J.O.A.Artigo IPEN-doc 07352 Characteristics of rice husks for chlorination reaction2000 - ANDREOLI, M.; LUCA, G.T.C.; SEO, E.S.M.Artigo IPEN-doc 09269 Silicon tetrachloride production by chlorination method using rice husk as raw material2003 - SEO, E.S.M.; ANDREOLI, M.; CHIBA, R.Artigo IPEN-doc 19196 Avaliação das propriedades do Basub(0,50)Srsub(0,50)Cosub(0,80)Fesub(0,20)Osub(3-d) para células a combustível de óxido sólido de temperatura intermediária obtido pelo método citratos-EDTA2013 - BONTURIM, E.; VARGAS, R.A.; ANDREOLI, M.; SEO, E.S.M.Ba0,50Sr0,50Co0,80Fe0,20O3-d (BSCF) apresenta propriedades físicas, químicas e microestruturais adequadas para compor o cátodo de uma célula a combustível de óxido sólido de temperatura intermediária (ITSOFC). Este trabalho tem por objetivo a síntese e a caracterização do BSCF obtido pelo método dos citrados-EDTA. Os resultados obtidos por difração de raios X (DRX) indicaram fases secundárias para o material calcinado a 700 e 800 ºC e fase única com estrutura cristalina do tipo perovskita para 900 ºC. As micrografi as obtidas por microscopia eletrônica de varredura dos particulados evidenciou a formação de aglomerados de tamanho < 20 μm. A análise dilatométrica dos compactos indicou a temperatura de sinterabilidade ~ 1050 ºC. Os resultados de DRX das cerâmicas sinterizadas evidenciaram a presença de fase única perovskita. As micrografi as dos sinterizados confi rmaram a formação de maior porosidade nas amostras sinterizadas a 1000 °C /1 h, conformadas com pó calcinado a 900 °C. Palavras-chave: método dos citratos-EDTA, ITSOFC, cátodo, perovskita.Artigo IPEN-doc 11884 Solid oxide fuel cells2006 - CHIBA, RUBENS; VARGAS, REINALDO A.; ANDREOLI, MARCO; SEO, EMILIA S.M.Nowadays, the La1-XSrXMnO3 (LSM) is one of the most common cathodic materials used in the solid oxide fuel cells (SOFCs). The dopant strontium increases the electronic conductivity of the material, besides presents an excellent electrochemical performance, relatively good chemical and thermal stability and compatibility with solid electrolyte of ZrO2/Y2O3 (YSZ). In this work, a contribution to the study of synthesis of LSM is presented with strontium concentration of 50 mol % by the citrate technique. The powders have been characterized for various techniques, as gas absorption and adsorption, X-ray fluorescence spectroscopy, laser scattering granulometry, gas helium picnometry, scanning electron microscopy (SEM), X-ray diffractometry (XRD) and calculations of theoretical density and particle average diameter. The ceramics have been characterized by SEM and XRD. The adequate characteristics of LSM have been evaluated aiming at the use in the preparation of suspensions for cathodic thin films of SOFCs.Artigo IPEN-doc 12299 Sintese e caracterizacao dos pos de NdlxSrxMnO3 e Lal-x-SrxCo1-yFeyO32007 - VARGAS, R.A.; CHIBA, R.; ANDREOLI, M.; SEO, E.S.M.Artigo IPEN-doc 12300 Catodo para celula a combustivel de oxido solido: Sintese e caracterizacao de manganito de lantanio dopado com estroncio2007 - CHIBA, R.; VARGAS, R.A.; ANDREOLI, M.; SEO, E.S.M.