Materials Literature
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The cover picture shows Zn0@ZnS core-shell nanoparticles and their synthesis via intermediate Zn0 nanoparticles. Zn0 nanoparticles (8 nm in diameter) are prepared by sodium naphthalenide ([NaNaph]) reduction of ZnCl2 in tetrahydrofuran. The intermediate, highly reactive Zn0 nanoparticles are partially oxidized thereaf…
Spectral broadening of blue apatite phosphors (Sr, Ba)5(PO4)3Cl:Ce3+ was achieved by changing Sr-Ba cation combinations. Their blue emission colors come from the 5d1-4f1 transition of Ce3+ ions, and their excitation bands are ranged from 250 nm to 400 nm. The substitution of Ba2+ for Sr2+ ions was confirmed by Raman s…
The materials used in the present investigation were filled silicone rubbers supplied by Shin-Etsu Chemical Co., Ltd. in Japan. Two kinds of silicone rubbers were studied in the hardness levels of Shore A 50 and 80.
Significance and UseA2.4 Significance and Use A2.4.1 This test method describes the testing procedure that shall be used to qualify material for use in ASTM F3111 bolts made of any steel composition permitted by this specification. The test method measure
This review gives an overview on the current understanding of line and planar defects in Cu(In,Ga)Se 2 thin fi lms and their impacts on the
With the recent growth in the worldwide market for nuclear power plants, there has been an increasing interest in gaining a competitive edge in the export of nuclear power plants. In particular, as nuclear structures become more specialized and enlarged, and design criteria become stricter due to industrial demands, t…
Significance and Use 4.1 The property retention index (PRI) determined by this practice is intended primarily to provide relative durability performance information on materials for design engineers. It is up to the user to ensure that appropriate samplin
ΣΚΟΠΟΣ: H κυτταρολογία του ενδομητρίου θα μπορούσε να είναι μια εναλλακτική μέθοδος για τη διάγνωση του καρκίνου του ενδομητρίου. Στόχος της παρούσας μελέτης είναι να διερευνήσει τις δυνατότητες ενός Πολυστρωματικού Τεχνητού Νευρωνικού Δικτύου με Νευρώνες Perceptron (ΤΝΔ- MPL), για τη διάκριση μεταξύ καλοήθων από κακο…
LETI, a French research center, has developed during the past 20 years a strong expertise on Non-Volatile Memory Devices, covering Flash evolutive solutions (Si-Ncs, TANOS, FinFLASH, 3D, Splitgate) and disruptive technologies (Phase-Change PCM, Oxide-based RAM OxRAM, Conductive-Bridge RAM CBRAM, Magnetic STT-MRAM). Ma…
Hydrogen evolution is one of the common cathodic reactions involved in corrosion of metals and alloys in aqueous solutions. The reduction of hydrogen ions is a source of atomic hydrogen on the surfaces of metals. Corrosion reactions, the application of cathodic protection and electroplating, etc., can introduce hydrog…
Oxygen transport membranes (OTM) are dense ceramics oxides that can move oxygen along a chemical potential gradient. The membrane must be oxygen-ion conductive to transport oxygen, but should also be electronically conductive in order to maintain internal charge neutrality. In the simplest design, the ceramic membrane…
Here we present initial results towards the fabrication of suspended structures between photo-patterned high aspect ratio SU-8 posts. Preliminary results illustrated in figure 1a and bshow that carbon wires of diameter down to 200 nm can be formed by carbonizing suspended SU-8 bridges. SU-8 is an epoxy-based negative…
Cation segregation is a common phenomenon ocurring at high and intermediate temperatures in the perovskite materials often used as oxygen electrodes in solid oxide fuel cells and electrolyzers (SOFC/SOEC). Most of these perovskite oxides, with the general formula ABO3, are doped either in the A-site or B-site lattice…
The present study concerns the influence of the micro/nano-structural properties of LSCF (La0.6Sr0.4Co0.2Fe0.8O3−δ) and 60:40 vol.% LSCF/CGO (Ce0.9Gd0.1O2-δ) composite cathode films on their electrochemical behavior. Electrostatic spray deposition technique is used to deposit 10 μm-thick functional films (Fig. 1). Con…
Significance and Use 5.1 The crystallinity of UHMWPE will influence its mechanical properties, such as creep and stiffness. The reported crystallinity will depend on the integration range used to determine the heat of fusion, and the theoretical heat of
This specification applies to composite pellets composed of mixtures of nuclear-grade aluminum oxide and boron carbide that may be ultimately used in a reactor core, for example, in neutron absorber rods. Specimens shall be sampled and tested as appropriate, and shall adhere accordingly to required chemical compositio…
Here we present preliminary experiments for synthesis of carbide materials from bacterial cellulose that has been infiltrated with tungsten trioxide nanoparticles. Bacterial cellulose decomposes to carbon upon heat treatment around 900 °C. Upon further heat treatment in the presence of the metal oxide, this carbon rea…
Solid oxide fuel cells (SOFCs) are devices that can convert chemical energy to electricity directly with high efficiency and fuel flexibility. Here, we fabricate perovskite single crystal thin films as cathodes with the composition of Ba0.95La 0.05FeO3-δ (BLF) by pulsed laser deposition (PLD) on yttria-stabilized zirc…
Solid oxide fuel cells (SOFCs) have attracted significant attention over recent years due to their promising use as source of clean and efficient power generation. Towards the goal of enhancing the efficiency of these devices, it is important to eludicate the mechanisms governing fundamental electrochemical processes,…
This specification covers cylinder burst disk assemblies for paintball marker propellant sources their application and installation requirements. The materials and processes used to manufacture the burst disk assembly shall result in items with mechanical strength sufficient to pass the applicable burst pressure tests…