Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
NiO/YSZ hollow fibers were fabricated via a combined phase inversion and sintering technique, where polyethersulfone (PESf) was employed as the polymeric binder and N-methyl-2- pyrrolidone (NMP) as solvent. After sintering at 1400{degree sign}C and being reduced by hydrogen at 800{degree sign}C, the hollow fibers show…
Recently, the standard manufacturing route for solid oxide fuel cells has been changed from warm pressing of the anode substrate of Coat Mix® powders towards tape casting of a mixture of yttria stabilized zirconia and nickel oxide to the anode substrate. Due to different shrinkage behavior, especially heat treatment s…
Crystal structure and mechanical properties of La2NiO4+d were measured by high temperature X-ray diffractometry and in-situ small punch test as a function of temperature and oxygen partial pressure. As P(O2) increases, the lattice parameter perpendicular to the perovskite layer increases and that parallel to the layer…
This paper discusses combined high-permeability and high-permittivity magnetodielectric thin films for microwaves. The results are based on outstanding material properties: epsiv = 18, mudc= 180, fr= 4.8 GHz, and Deltaf= 480 MHz. This material combines exchange coupled high-magnetization ferromagnetic thin films and S…
This work is focused on the evaluation of different Ga(III) precursor (conventional acetylacetonates, malonates and amides) for the MOCVD of Ga2O3 thin films. In particular, the attention is devoted to a thorough comparison of the precursor qualifying properties (volatility, thermal stability under the vaporization co…
The size of electronic leak currents through the YSZ electrolyte of solid oxide cells have been calculated using basic solid state electrochemical relations and literature data. The distribution of the electromotive potential, of Galvani potential, of concentration of electrons, e, and electron holes, h, was also calc…
The solid-state reactivity between La(Ni0.6Fe0.4)O3 (LNF) and Cr2O3 in the IT-SOFC operating temperature range of 600-800 ºC has been investigated using XRD analysis. Because LNF material can be used as a cathode, as a current collecting layer and/or an interconnect coating, a thorough investigation of its chemical st…
CuFe-Ce0.9Gd0.1O2- (CF-CG) has been prepared in order to explore its potential as anode material for Intermediate Temperature Fuel Cell (IT-SOFC) for direct oxidation of methane. In this work, the catalytic activity, the thermal expansion coefficient, the morphology, the electrical conductivity and the chemical compat…
In order to investigate the effect of the quenching rate on the magnetostriction of Fe82.5Ga17.5alloy, a set of ribbons was prepared by varying the wheel velocities from 7.5 up to 25 m/s. Additionally Fe85Al15, Fe81Al19and Fe75Al25ribbons were prepared under similar conditions. The microstructure shows generally colum…
Chromia-forming ferritic stainless steels are being considered for interconnector applications in planar solid oxide fuel cell (SOFC) stacks because of their low cost and excellent physical properties. Nevertheless, some problems still need to be solved as the performance degradation due to the oxide scale growth at t…
Impedance spectra of a symmetrical cell with SOFC cathodes (LSM-YSZ/YSZ/LSM-YSZ) and an anode supported planar SOFC (Ni-YSZ/YSZ/LSM-YSZ) were collected at OCV at 650{degree sign}C in air (cathode) and humidified (4%) hydrogen (anode), over 155 hours. The impedance was affected by degradation over time in the same freq…
A numerical framework to compute the effective transport coefficients for porous electrode microstructures is presented. The anode and cathode electrodes of solid oxide fuel cells are discretized as porous microstructures that are formed by randomly distributed and overlapping spheres with particle size distributions…
In agreement with the ITRS roadmap, there have been several publications supporting the reduction in critical dimensions and the introduction of new materials to semiconductor processing (1,2,3). This paper highlights the observations and solutions to some of the critical material and process interactions encountered…
We report 24-30 nm spherical barium ferrite (S-BaFe) particles having extremely narrow size distribution without any superparamagnetic phase. We have converted spherical magnetite (S-Mag) nanoparticles to S-BaFe nanoparticles using a unique adsorption-diffusion process. The synthesized S-BaFe nanoparticles were charac…
Iron-Gallium alloys (Galfenol) possess a body centered cubic (BCC) alpha-Fe structure with the gallium atoms substituted throughout the lattice structure. Polycrystalline metals are often isotropic due to their overall random crystallographic orientation, however single crystal and strongly textured polycrystalline BC…
Temperature dependent magnetoelastic properties of Fe100-xGex(5100measurements atx= 5.7, 12.1, 14.9, and 17.7 were performed between 78 K and 426 K and resonant ultrasound spectroscopy measurements were used to determine the shear elastic constant c' from 5 K to 300 K forx= 6.4, 7.2, 10.8, 14.6, 17.7 , and 17.9 . A cl…
In earlier research, sintering of Ni infiltrated into porous anodes in SOFCs was responsible for loss in performance. The idea of introducing strong metal support interactions (SMSI) has been investigated as a possible method for curbing the sintering of Ni. Titania, when used as a support in catalysts, has been found…
Surface modified A-site deficient lanthanum-doped SrTiO3 (La0.2Sr0.7TiO3) was evaluated as a potential anode component material for intermediate temperatures SOFCs. The reduction of the material has been investigated and results of thermal expansion and conductivity dependence of the oxygen partial pressures are prese…
A thermal analysis of the anode, cathode and electrolyte of a practical solid oxide fuel cell (SOFC) is performed. Electrochemical impedance spectroscopy with two-electrode set-up is employed on an anode-supported micro tubular SOFC. This cell is an intermediate temperature SOFC composed of an Ni/(ZrO2)0.9(Y2O3)0.1 ce…
In this present paper, a comprehensive trio approach has been proposed to aid in the optimisation of the pre-reforming process, and to develop a new pre-reformer design. Measurements, design of experiments (DOE), and computational fluid dynamics (CFD) have been employed to determine the effects of several design and m…