Materials Literature
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We report on the fabrication of cheap piezoelectric porous InP templates by electrochemical etching and additional purely chemical post-etching and on the galvanic filling of the resulting nanopore array with Ni-Fe using a highly viscous electrolyte. The d14 component of porous InP is found to be around a stunning |60…
An ultra-compact, portable solid oxide fuel cell (SOFC) system in the 100 Watt class is presented which is based on multilayer and ceramic technology and that runs on conventional fuels. The active SOFC system core within the insulation is smaller than 1 liter. The eneramic® system is designed for LPG mixtures and ope…
This paper describes recent results from the utilization of tar loaded synthetic wood gas in a planar single SOFC (Ni-GDC/YSZ/LSM) at OCV conditions. The distinct influence of naphthalene, toluene and xylene on direct steam reforming of methane is investigated. It is shown that the high reactivity of naphthalene cause…
In this paper, we discuss the generation of deep-level hole traps (DLHTs) during negative-bias temperature stressing. Because of their ability to trap positive charges for a long time, it is imperative to gain a sound understanding on the nature of the DLHT, especially in relation to nitrogen, which has been incorpora…
본 논문에서는 ultraviolet (UV) 광의 세기를 원격으로 측정하기 위한 아조벤젠 (azobenzene) 코팅된 fiber Bragg grating (FBG)를 구현하였다. 아조벤젠 폴리머는 UV 광에 의해서 탄성이 변화하여 FBG의 코어 격자의 주기 변화를 유도하여 중심파장을 이동시킨다. 중심파장의 이동은 UV 광과 UV 이외의 파장대역의 빛에 의해서 복합적으로 발생하는데 중심파장의 이동량은 약 0.18 nm 이다. 측정의 정확성을 향상시키기 위해서 광원의 복사열에 의한 중심파장의 이동을 열차단 필터(thermal filter)를 사용하여 제거한 결과 중심…
The electrochemical behaviour of La0.6Sr0.4Co1-yFeyO3-d cathodes with y = 0.2 and 0.8 was examined, for two distinct film morphologies, using impedance spectroscopy between 400 and 600° at OCV in air. LSCF films were deposited by Electrostatic Spray Deposition (ESD) technique onto Ce0.9Gd0.1O2-d substrates, resulting…
Ni-YSZ anode supports were used to fabricate test cells composed of yttria-stabilised zirconia (YSZ) electrolyte and lanthanum strontium ferrite (LSF) or lanthanum strontium manganite (LSM) / YSZ cathodes. These cells were operated at 720 °C at an average current density of 0.28 to 0.46 A/cm2. A central piece of selec…
Abstract A new method of preparation of oligoetherols containing perhydro‐1,3,5‐triazine rings from isocyanuric acid and an excess of glycidol, alkylene carbonates, or oxiranes is presented. The course of reaction was studied at various molar ratios of glycidol to isocyanuric acid. The structure of the products was es…
Various cathode contact paste material (CCM) candidates are fabricated and screened for CTE, conductivity, sintering behavior, and reactivity with LSCF and (Mn,Co)3O4. The most promising candidates, LSCF, SSC, LSCuF, LSC, and NCC are subjected to ASR testing on LSCF and MCO-coated 441 steel coupons. LSC provides the l…
Creep properties of a commercial Ni-8YSZ cermet have been investigated at the SOFC operating temperatures. Experiments have shown that Ni-8YSZ cermet exhibits substantial creep strain rates. The creep activation energy and the parameters of the Norton's law have been determined from the experimental data. Impact of su…
Addition of 0.5% hydrogen sulfide into syngas improved the performance of a oxygen conducting solid oxide fuel cell by enhancing the electrochemical oxidation of carbon monoxide. However, there was no consumption of hydrogen sulfide, as determined by mass spectrometric and gas chromatographic analyzes of the effluent…
Yttria stabilized zirconia (YSZ) and La0.8Sr0.2MnO3 (LSM) nanofibers were prepared by electrospinning method. The diameter of the nanofibers is around 200 nm and tens of microns. The crystal phase and morphology of the nanofibers were examined. The nanofibers exhibit chemical and structural stability at high temperatu…
SOFC electrodes are typically porous composite materials bringing ionic, electronic and pore phases into intimate contact. These electrodes must fulfill a broad range of criteria from diffusion and electrocatalysis to mechanical support and redox tolerance. Historically design and optimisation has been largely empiric…
Corn starch has been widely used in biomaterial industry as one of the raw materials. The properties of starch such as annealing and the different ratio of amylose and amylopectin in different starch limit its application in production. These properties play a vital role in establishing relationships between other sta…
A new boron-based hardmask material was developed using a conventional CVD approach to address the integration challenges associated with the use of metal hardmask for low k dielectric patterning. Its low and tunable stress eliminates any patterning concerns due to line bending for device nodes below 20nm. Defectivity…
We fabricated phosphorescent organic light-emitting devices with a 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) host layer. Two kinds of devices, one of ITO/TAPC/TAPC:FIrpic/TAZ/LiF/Al (device A) and one of ITO/TAPC:FIrpic/TAPC/TAZ/LiF/Al (device B), were prepared to investigate electrical and optical properties…
Abstract Evidence for intercalated and exfoliated clay nanostructures was found in Acrylonitrile‐butadiene‐styrene/montmorillonite (MMT) compounds. Formulations with MMT from 0.5 to 9 vol. % have been processed by single screw capillary extrusion. Melt rheology showed that the onset of shear thinning shifts to lower s…
Mats of cellulose acetate (CA) nanofibers containing 2,6-dichloro-4-nitroaniline (DCNA) were successfully fabricated by electrospinning from the neat CA solution (17% w/v in 2:1 acetone/dimethylacetamide) containing DCNA in various amounts (i.e. 5-15 wt. % based on the weight of CA). The morphological appearance of bo…
The development of solid oxide fuel cells has reached a new stage with intermediate temperature SOFCs. The protonic ceramic fuel cell is fundamentally different because it relies on proton conductivity through the electrolyte and not oxygen ions like SOFCs. Only few experimental results on PCFC are reported in literat…
In this work, the permittivity of a tailored compound material was investigated consisting of a polyimide matrix in which hollow glass microspheres with a mean diameter of 30 μm are implemented as filler material. Choosing this approach the dielectric constant compared to that of the pure polyimide material is further…