The Experts below are selected from a list of 88113 Experts worldwide ranked by ideXlab platform
Pierre Lefort - One of the best experts on this subject based on the ideXlab platform.
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Fabrication and characterization of ZrB2-SiC ceramic electrodes coated with a proton conducting, SiO2-rich glass layer
Electrochimica Acta, 2011Co-Authors: Quentin Lonne, Nicolas Glandut, Jean-claude Labbé, Pierre LefortAbstract:3.5 m thin layers of dense, crack-free, proton conducting, SiO2-rich glass have been developed on ZrB2-SiC ceramic composites, by thermal oxidation at 1400 ◦C for 30 min in air. A conductivity of 2 mS cm−1 at 25 ◦C was found, as measured by AC impedance and steady-state voltammetry, and was estimated at ca. 2 × 10−2 S cm−1 at 80 ◦C. A striking behaviour of the oxidized ZrB2-SiC composites is also pointed out: underneath the glass layer, there is a porous layer rich in electronic conductive ZrB2, without well-Defined Interface between them, i.e., exhibiting a composition gradient in oxygen. In other words, protonic half-fuel cells could be fabricated under such conditions, for future use in hydrogen or direct alcohol fuel cells.
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Fabrication and characterization of ZrB2–SiC ceramic electrodes coated with a proton conducting, SiO2-rich glass layer
Electrochimica Acta, 2011Co-Authors: Quentin Lonne, Nicolas Glandut, Jean-claude Labbé, Pierre LefortAbstract:Abstract 3.5 μm thin layers of dense, crack-free, proton conducting, SiO 2 -rich glass have been developed on ZrB 2 –SiC ceramic composites, by thermal oxidation at 1400 °C for 30 min in air. A conductivity of 2 mS cm −1 at 25 °C was found, as measured by AC impedance and steady-state voltammetry, and was estimated at ca. 2 × 10 −2 S cm −1 at 80 °C. A striking behaviour of the oxidized ZrB 2 –SiC composites is also pointed out: underneath the glass layer, there is a porous layer rich in electronic conductive ZrB 2 , without well-Defined Interface between them, i.e., exhibiting a composition gradient in oxygen. In other words, protonic half-fuel cells could be fabricated under such conditions, for future use in hydrogen or direct alcohol fuel cells.
Quentin Lonne - One of the best experts on this subject based on the ideXlab platform.
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Fabrication and characterization of ZrB2-SiC ceramic electrodes coated with a proton conducting, SiO2-rich glass layer
Electrochimica Acta, 2011Co-Authors: Quentin Lonne, Nicolas Glandut, Jean-claude Labbé, Pierre LefortAbstract:3.5 m thin layers of dense, crack-free, proton conducting, SiO2-rich glass have been developed on ZrB2-SiC ceramic composites, by thermal oxidation at 1400 ◦C for 30 min in air. A conductivity of 2 mS cm−1 at 25 ◦C was found, as measured by AC impedance and steady-state voltammetry, and was estimated at ca. 2 × 10−2 S cm−1 at 80 ◦C. A striking behaviour of the oxidized ZrB2-SiC composites is also pointed out: underneath the glass layer, there is a porous layer rich in electronic conductive ZrB2, without well-Defined Interface between them, i.e., exhibiting a composition gradient in oxygen. In other words, protonic half-fuel cells could be fabricated under such conditions, for future use in hydrogen or direct alcohol fuel cells.
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Fabrication and characterization of ZrB2–SiC ceramic electrodes coated with a proton conducting, SiO2-rich glass layer
Electrochimica Acta, 2011Co-Authors: Quentin Lonne, Nicolas Glandut, Jean-claude Labbé, Pierre LefortAbstract:Abstract 3.5 μm thin layers of dense, crack-free, proton conducting, SiO 2 -rich glass have been developed on ZrB 2 –SiC ceramic composites, by thermal oxidation at 1400 °C for 30 min in air. A conductivity of 2 mS cm −1 at 25 °C was found, as measured by AC impedance and steady-state voltammetry, and was estimated at ca. 2 × 10 −2 S cm −1 at 80 °C. A striking behaviour of the oxidized ZrB 2 –SiC composites is also pointed out: underneath the glass layer, there is a porous layer rich in electronic conductive ZrB 2 , without well-Defined Interface between them, i.e., exhibiting a composition gradient in oxygen. In other words, protonic half-fuel cells could be fabricated under such conditions, for future use in hydrogen or direct alcohol fuel cells.
Jean-claude Labbé - One of the best experts on this subject based on the ideXlab platform.
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Fabrication and characterization of ZrB2-SiC ceramic electrodes coated with a proton conducting, SiO2-rich glass layer
Electrochimica Acta, 2011Co-Authors: Quentin Lonne, Nicolas Glandut, Jean-claude Labbé, Pierre LefortAbstract:3.5 m thin layers of dense, crack-free, proton conducting, SiO2-rich glass have been developed on ZrB2-SiC ceramic composites, by thermal oxidation at 1400 ◦C for 30 min in air. A conductivity of 2 mS cm−1 at 25 ◦C was found, as measured by AC impedance and steady-state voltammetry, and was estimated at ca. 2 × 10−2 S cm−1 at 80 ◦C. A striking behaviour of the oxidized ZrB2-SiC composites is also pointed out: underneath the glass layer, there is a porous layer rich in electronic conductive ZrB2, without well-Defined Interface between them, i.e., exhibiting a composition gradient in oxygen. In other words, protonic half-fuel cells could be fabricated under such conditions, for future use in hydrogen or direct alcohol fuel cells.
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Fabrication and characterization of ZrB2–SiC ceramic electrodes coated with a proton conducting, SiO2-rich glass layer
Electrochimica Acta, 2011Co-Authors: Quentin Lonne, Nicolas Glandut, Jean-claude Labbé, Pierre LefortAbstract:Abstract 3.5 μm thin layers of dense, crack-free, proton conducting, SiO 2 -rich glass have been developed on ZrB 2 –SiC ceramic composites, by thermal oxidation at 1400 °C for 30 min in air. A conductivity of 2 mS cm −1 at 25 °C was found, as measured by AC impedance and steady-state voltammetry, and was estimated at ca. 2 × 10 −2 S cm −1 at 80 °C. A striking behaviour of the oxidized ZrB 2 –SiC composites is also pointed out: underneath the glass layer, there is a porous layer rich in electronic conductive ZrB 2 , without well-Defined Interface between them, i.e., exhibiting a composition gradient in oxygen. In other words, protonic half-fuel cells could be fabricated under such conditions, for future use in hydrogen or direct alcohol fuel cells.
Nicolas Glandut - One of the best experts on this subject based on the ideXlab platform.
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Fabrication and characterization of ZrB2-SiC ceramic electrodes coated with a proton conducting, SiO2-rich glass layer
Electrochimica Acta, 2011Co-Authors: Quentin Lonne, Nicolas Glandut, Jean-claude Labbé, Pierre LefortAbstract:3.5 m thin layers of dense, crack-free, proton conducting, SiO2-rich glass have been developed on ZrB2-SiC ceramic composites, by thermal oxidation at 1400 ◦C for 30 min in air. A conductivity of 2 mS cm−1 at 25 ◦C was found, as measured by AC impedance and steady-state voltammetry, and was estimated at ca. 2 × 10−2 S cm−1 at 80 ◦C. A striking behaviour of the oxidized ZrB2-SiC composites is also pointed out: underneath the glass layer, there is a porous layer rich in electronic conductive ZrB2, without well-Defined Interface between them, i.e., exhibiting a composition gradient in oxygen. In other words, protonic half-fuel cells could be fabricated under such conditions, for future use in hydrogen or direct alcohol fuel cells.
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Fabrication and characterization of ZrB2–SiC ceramic electrodes coated with a proton conducting, SiO2-rich glass layer
Electrochimica Acta, 2011Co-Authors: Quentin Lonne, Nicolas Glandut, Jean-claude Labbé, Pierre LefortAbstract:Abstract 3.5 μm thin layers of dense, crack-free, proton conducting, SiO 2 -rich glass have been developed on ZrB 2 –SiC ceramic composites, by thermal oxidation at 1400 °C for 30 min in air. A conductivity of 2 mS cm −1 at 25 °C was found, as measured by AC impedance and steady-state voltammetry, and was estimated at ca. 2 × 10 −2 S cm −1 at 80 °C. A striking behaviour of the oxidized ZrB 2 –SiC composites is also pointed out: underneath the glass layer, there is a porous layer rich in electronic conductive ZrB 2 , without well-Defined Interface between them, i.e., exhibiting a composition gradient in oxygen. In other words, protonic half-fuel cells could be fabricated under such conditions, for future use in hydrogen or direct alcohol fuel cells.
Rohan Adur - One of the best experts on this subject based on the ideXlab platform.
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damping of confined modes in a ferromagnetic thin insulating film angular momentum transfer across a nanoscale field Defined Interface
Physical Review Letters, 2014Co-Authors: Rohan Adur, Hailong Wang, Sergei A Manuilov, Vidya Bhallamudi, Chi Zhang, D V Pelekhov, Fengyuan Yang, Chris P HammelAbstract:We observe a dependence of the damping of a confined mode of precessing ferromagnetic magnetization on the size of the mode. The micron-scale mode is created within an extended, unpatterned yttrium iron garnet film by means of the intense local dipolar field of a micromagnetic tip. We find that the damping of the confined mode scales like the surface-to-volume ratio of the mode, indicating an interfacial damping effect (similar to spin pumping) due to the transfer of angular momentum from the confined mode to the spin sink of ferromagnetic material in the surrounding film. Though unexpected for insulating systems, the measured intralayer spin-mixing conductance g_↑↓=5.3×10(19) m(-2) demonstrates efficient intralayer angular momentum transfer.
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Damping of Confined Modes in a Ferromagnetic Thin Insulating Film: Angular Momentum Transfer across a Nanoscale Field-Defined Interface
Physical review letters, 2014Co-Authors: Rohan Adur, Hailong Wang, Sergei A Manuilov, Vidya Bhallamudi, Chi Zhang, D V Pelekhov, Fengyuan Yang, P. Chris HammelAbstract:We observe a dependence of the damping of a confined mode of precessing ferromagnetic magnetization on the size of the mode. The micron-scale mode is created within an extended, unpatterned yttrium iron garnet film by means of the intense local dipolar field of a micromagnetic tip. We find that the damping of the confined mode scales like the surface-to-volume ratio of the mode, indicating an interfacial damping effect (similar to spin pumping) due to the transfer of angular momentum from the confined mode to the spin sink of ferromagnetic material in the surrounding film. Though unexpected for insulating systems, the measured intralayer spin-mixing conductance ${g}_{\ensuremath{\uparrow}\ensuremath{\downarrow}}=5.3\ifmmode\times\else\texttimes\fi{}{10}^{19}\text{ }\text{ }{\mathrm{m}}^{\ensuremath{-}2}$ demonstrates efficient intralayer angular momentum transfer.
