Search Results - "Perottoni, C. A."

Determination of ferrous and ferric iron from total iron content and thermogravimetric analysis by Zorzi, J. E., Perottoni, C. A., Cruz, R. C. D.

“…Ferrous ( Fe 2 + ) and ferric ( Fe 3 + ) iron content in mineral samples was determined from total iron (as obtained, for instance, from X-ray fluorescence…”
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Reference material for temperature calibration of differential scanning calorimeters above 1400 °C by Zorzi, J. E., Segadães, A. M., Perottoni, C. A.

“…Platinum crucible pans are widely used for differential scanning calorimetry (DSC) at temperatures above the aluminum melting point (about 660 °C) due to good…”
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Pressure-induced amorphization and negative thermal expansion in ZrW2O8 by PEROTTONI, C. A, DA JORNADA, J. A. H

“…It has recently been shown that zirconium tungstate (ZrW2O8) exhibits isotropic negative thermal expansion over its entire temperature range of stability. This…”
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Effect of annealing on the elastic moduli of amorphous zirconium tungstate by Lorenzi, R.F.L., Zorzi, J.E., Perottoni, C.A.

“…Amorphous zirconium tungstate (a-ZrW2O8), prepared at 7.7GPa, was subjected to successive heat treatments at increasingly higher temperatures, up to 640°C…”
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Hardness and wear resistance of B4C ceramics prepared with several additives by Zorzi, J E, Perottoni, C A, da Jornada, J A H

“…Boron carbide-based ceramics were obtained by pressureless sintering at 2250 deg C in the presence of several additives (C, B, TiB2 and SiC). All the samples…”
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Estimating Young's modulus and Poisson's ratio by instrumented indentation test by Zorzi, J.E., Perottoni, C.A.

“…The estimate of Young's modulus from instrumented indentation test results relies on knowing in advance the Poisson's ratio of the sample's material. However,…”
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Modeling of amorphous carbon structures with arbitrary structural constraints by Jornada, F H, Gava, V, Martinotto, A L, Cassol, L A, Perottoni, C A

“…In this paper we describe a method to generate amorphous structures with arbitrary structural constraints. This method employs the simulated annealing…”
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Carbon occupancy of interstitial sites in vanadium carbide films deposited by direct current reactive magnetron sputtering by Portolan, E., Amorim, C.L.G., Soares, G.V., Aguzzoli, C., Perottoni, C.A., Baumvol, I.J.R., Figueroa, C.A.

“…Vanadium carbide thin films were deposited on Si substrates by direct current reactive magnetron sputtering from a V target in Ar/CH 4 plasma, varying the…”
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First-principles mode Gruneisen parameters and negative thermal expansion in α-ZrW2O8 by Gava, V, Martinotto, A L, Perottoni, C A

“…Mode Grüneisen parameters were estimated for α-ZrW(2)O(8) zone-center modes by means of density functional theory calculations and the temperature dependence…”
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Molecular dynamics simulations of the isotopic effect on nanoscale friction by Matté, D., Rech, G. L., Leidens, L. M., Zorzi, J. E., Michels, A. F., Figueroa, C. A., Perottoni, C. A.

“…Computer simulations are becoming increasingly useful for studying friction, enabling the application of controlled conditions and setups that are not usually…”
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Identification of α-Al2O3 surface sites and their role in the adsorption of stearic acid by Webber, J., Zorzi, J. E., Perottoni, C. A., Moura e Silva, S., Cruz, R. C. D.

“…ABSTRACT The adsorption isotherm of stearic acid (SA) on α-Al 2 O 3 previously subjected to dialysis by ion exchange was determined with the aid of LC–MS…”
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A tool for assisting phase identification by micro‐Raman spectroscopy by Ramos, G. R., Zorzi, J. E., Cruz, R. C. D., Perottoni, C. A.

“…Although powder X‐ray diffraction is often the primary choice for the analysis of naturally occurring materials, the robust identification of individual…”
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An investigation on the preparation of nanocrystalline hydrous zirconia from zirconium tungstate by Antunes, M., Perottoni, C. A., Gouvêa, D., Machado, G., Zorzi, J. E.

“…Hydrous nanocrystalline zirconia was prepared from an unusual precursor—the bimetallic oxide zirconium tungstate (ZrW 2 O 8 )—in alkaline medium. Different…”
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Raman spectroscopy as a probe for in situ studies of pressure-induced amorphization: some illustrative examples by Pereira, A. S., Perottoni, C. A., da Jornada, J. A. H.

“…The main models proposed in the literature to describe pressure‐induced amorphization (PIA) are briefly reviewed, with special emphasis on the kinetic aspects…”
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Hard-skin development during binder removal from Al2O3-based green ceramic bodies by ZORZI, J. E, PEROTTONI, C. A, JORNADA, J. A. H. D. A

“…A paraffin-based binder system was developed for low-pressure injection molding of very fine (0.4 μm) average particle size alumina ceramic bodies. Complex…”
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A new partially isostatic method for fast debinding of low-pressure injection molded ceramic parts by Zorzi, J.E, Perottoni, C.A, da Jornada, J.A.H

“…Injection molding has many important advantages over other methods for the production of advanced ceramic bodies with complex shapes. However, the particle…”
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Isothermal equation of state for the skutterudites CoSb3 and LaFe3CoSb12 by KRAEMER, A. C, PEROTTONI, C. A, H. DA JORNADA, J. A

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Synthesis and thermoelectric properties of Sb0.20CoSb2.80 skutterudite by Figueirêdo, C.A., Gallas, M.R., Zorzi, J.E., Perottoni, C.A.

“…•A HP-HT Sb0.20CoSb2.80 phase was prepared by processing cobalt antimonide at 7.7GPa and 550°C, for (at least) 5min.•The mechanism of formation of this phase…”
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Entropy increase in the amorphous-to-crystalline phase transition in zirconium tungstate by Perottoni, C.A., Zorzi, J.E., da Jornada, J.A.H.

“…It has been shown that zirconium tungstate (ZrW 2O 8) exhibits isotropic negative thermal expansion and undergoes pressure-induced amorphization above 1.5 GPa,…”
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Vibrational study of 5-azacytosine and propanedinitrile under high pressure by Puerto, M.A., Miotto, F., Catafesta, J., Perottoni, C.A., Balzaretti, N.M.

“…The effect of high pressure on the vibrational modes of 5-azacytosine (C3H4N4O) and propanedinitrile (CH2(CN)2) was investigated at room temperature using a…”
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