Materials Literature
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The electrolyte supported cells with low area specific resistance (ASR<0.34 Ohm cm²) have been tested for long-term, thermal and redox stability in ceramic housing. It has been shown that the cells with optimized anode microstructure have degradation <0,1 % / 1000h and no measurable resistance change in the rang…
In this paper, we discuss the effects of different oxygen partial pressures on the elastic modulus and fracture strength of 8 mol% yittria stabilized zirconia (8YSZ) and 10 mol% gadolinia doped ceria (10GDC). The specimens of 8YSZ and 10GDC prepared by a sintering process were treated at 800 åC under different oxygen…
Topsoe Fuel Cell (TOFC) provides the SOFC technology platform: Cells, stacks, and integrated stack module for different applications and collaborates with integrator partners to develop, test and demonstrate SOFC applications. The technology development is based on a R&D consortium with Riso̸ National Laboratory (…
A new type of current sensor is proposed which is made compact in a rugged form and operates in the temperature range up to 150 degrees Celsius. The operating principle of the sensor is based on inverse magnetostriction. The sensor consists of two ring-shaped magnetostrictive ferrite cores, a ring-shaped piezoelectric…
We report on magnetotransport measurements of nanoconstricted (Ga,Mn)As devices showing very large resistance changes that can be controlled by both an electric and a magnetic field. Based on the bias voltage and temperature-dependent measurements down to the millikelvin range we compare the models currently used to d…
Abstract High‐density polyethylene (HDPE) was graft functionalized with two different mercaptoesters in an inert atmosphere at 160°C under different experimental conditions by thermolysis method. The order of functionalization, crosslinking, and CC formation reactions were determined from the relative intensities of…
Various GDL structures were developed by numerical analysis, for example, carbon paper, paper with binders and cloth. Next, our past two-phase network model was improved and we evaluated the gas diffusion performance in wet various GDL with this model.
In this paper, we demonstrate the feasibility of using metal-insulator-metal (MIM) capacitors for energy storage. Using an all-ALD approach we deposit TiN, Al2O3 and TiN as the three constitutive films for the MIM stack, inside high aspect ratio (upto 200:1), self assembled, nanoporous anodic aluminum oxide (AAO) temp…
Porous stainless steel supported solid oxide fuel cells having nickel - ceria cermet anode, ceria electrolyte and lanthanum strontium iron cobalt perovskite cathode were fabricated by using inexpensive technologies of spraying, pressing and firing. A ceria cell fabricated on a porous support was found to show long-ter…
Experiments on the atomic layer deposition (ALD) of vanadium oxide from vanadyl triisopropoxide are presented. Water and oxygen plasma based processes are compared to the thermal process which uses water as a reagent. The plasma enhanced processes enable a fast ALD of films in a wide temperature range (50-200{degree s…
The crossover from a simple liquid to an unentangled oligomer diffusing into liquid and glassy entangled polymer matrices is studied by molecular dynamics simulations. The oligomer film is described by a bead−spring model of chain length N o = 10 and 50 while the polymer matrix consist of chains of length N p = 500. R…
Schützende Haut: Einzelmolekülmagnete (SMMs), die durch zwei Calix[4]arene geschützt sind, wurden synthetisiert (siehe Bild: Mn violett, O rot, N blau, C grau). Das Calixaren isoliert die SMMs, und durch Modifizieren seines oberen Randes können die Abstände zwischen den Schichten und damit die Festkörperpackung veränd…
The influences of SO2 and water vapor in air were investigated for (La0.8Sr0.2)0.98MnO3 (LSM) and La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) cathodes by measuring cell voltage at a constant current density of 200 mA cm-2 and the operational temperature of 800 oC. The results of 1000 h durability tests suggest that SO2 and water va…
A microstrip line fabricated on a single crystal hexagonal Y-type ferrite substrate was utilized to achieve phase shifts of ~65deg/cm at KU-band with an external bias field of only 100 Oe. This approach utilizes the rapid variation of the Y-type ferrite tensor permeability near the ferromagnetic antiresonance frequenc…
Structural, electrical, and magnetoreactance (mr) characteristics of rare earth-doped Ni ferrite (NiO.Fe2-xRxO3(x = 0, 0.075, R = Dy, Gd), and NiO.Fe1.95R0.05O3(R = Gd, Nd)) were investigated. All the materials formed in the cubic inverse spinel phase with small amounts of RFeO3as the additional phase. mr was measured…
This paper presents a unique magnetostrictive linear motor using Fe-Ga (Galfenol) alloys. The actuator is driven by a novel self-propelling mechanism that takes advantage of friction and inertial force. We describe in detail the driving principle and simply analyze it. We also present several experimental results rega…
A non linear homogenization approach, based on 3D edge finite elements method, is used to determine the equivalent electromagnetic properties of the Soft Magnetic Composites (SMC). A new geometry generation algorithm is introduced to take into account the material density, the randomized size and location of the SMC p…
Perovskite materials of the form ABO 3 are a promising family of compounds for use in solid oxide fuel cell (SOFC) cathodes. Study of the physics of these compounds under SOFC conditions with ab initio methods is particularly challenging due to high temperatures, exchange of oxygen with O 2 gas, and correlated electro…
Abstract (Oligopyridine)ruthenium(II) complexes have been widely used in dye sensitized solar cells and other sophisticated optical devices due to their outstanding photophysical properties and their chemical stability. Herein, we describe the longitudinal extension of our previously reported bis(terpyridine)ruthenium…
Based on the non-skeleton diagrammatic expansion satisfying the compressibility and spin-susceptibility sum rules, we investigate static charge and spin responses in a two-dimensional extended Hubbard model with the nearest-neighbor Coulomb repulsion in the vicinity of its charge-ordering transition point. In this exp…