spectroscopy

Europium-doped calcium titanate: Optical and structural evaluations

18 de setembro de 2013 Rose Portasio 0

Writers: Tatiana M. Mazzo, Ivo M. Pinatti, Leilane R. Macario, Waldir Avansi Junior, Mario L. Moreira, Ieda L. V. Rosa, Valmor R. Mastelaro, José A. Varela, Elson Longo Keywords: Structural evaluations; Optical evaluations; XANES spectroscopy Abstract: Pure Calcium […]

Synthesis and characterization of melanin in DMSO

17 de setembro de 2013 CDMF 0

Writers: Erika S. Bronze-Uhle; Augusto Batagin-Neto; Pedro H.P. Xavier; Nicole I. Fernandes; Eduardo R. de Azevedo; Carlos F.O. Graeff Keywords: Biomaterial; Solubility; Structural characterization; Spectroscopy methods; Organic synthesis Abstract: Recently soluble melanin derivatives have been […]

Ionic conductivity and phase stability of spark plasma sintered scandia and ceria-stabilized zirconia

29 de agosto de 2013 CDMF 0

Writers: R.L. Grosso; M. Bertolete; I.F. Machado; R. Muccillo; E.N.S. Muccillo Keywords: Zirconia; Spark plasma sintering; Crystalline structure; Microstructure; Impedance spectroscopy Abstract: In this work the effect of sintering on the ionic conductivity of scandia […]

Fe K-edge X-ray absorption spectroscopy study of Pb(Fe2/3W1/3)O-3-PbTiO3 multiferroic ceramics

18 de março de 2013 Rose Portasio 0

Writers: A. Mesquita, B. M. Fraygola, V. R. Mastelaro, J. A. Eiras Keywords: X-ray; spectroscopy; multiferroic ceramics Abstract: The present paper is a comprehensive study concerning Fe K-edge X-ray absorption spectroscopy (XAS) measurements, which were performed to characterize the […]

Morphotropic phase boundary and electrical properties of 1−x[Bi0.5Na0.5]TiO3 –xBa[Zr0.25Ti0.75]O3 lead-free piezoelectric ceramics

28 de dezembro de 2012 CDMF 0

Writers: B. Parija; T.Badapanda; S.K.Rout; L.S.Cavalcante; S.Panigrahi; E.Longo; N.C. Batista; T.P.Sinha Keywords: C. Electrical property; Rietveld refinement; Raman spectroscopy; Phase boundaries Abstract: Lead-free solid solutions (1−x)Bi0.5Na0.5TiO3 (BNT)–xBaZr0.25Ti0.75O3 (BZT) (x=0, 0.01, 0.03, 0.05, and 0.07) were […]

An experimental setup for shrinkage evaluation during electric field-assisted flash sintering: Application to yttria-stabilized zirconia

27 de outubro de 2012 Rose Portasio 0

Writers: R. Muccillo, E. N. S. Muccillo Keywords: Flash-sintering; Dilatometry; Impedance spectroscopy; FEG-SEM; Yttria-stabilized zirconia Abstract: Analyses of electrochemical impedance spectroscopy plots and dilatometric curves of ZrO2:Y2O3 (YSZ) green compacts upon sintering show the possibility of choosing the shrinkage level of […]

Electroinduction of Peculiar Space-Charge Regions in Fully-Glassy Lead Oxyfluoroborate Materials Discerned from Impedance Spectroscopy

17 de janeiro de 2012 Rose Portasio 0

Writers: José E. De Souza · Antonio C. Hernandes · Jean-Claude M’Peko Keywords: Lead oxyfluoroborate glasses; Electrocrystallization; Dielectric properties; Space-charge effects Abstract: Lead oxyfluoroborate (BO1.5–PbO–PbF2) glasses were prepared and studied in this work in terms of dielectric response. By applying impedance […]