Materials Literature
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Researchers at the National Institute of Advanced Industrial Science and Technology (AIST) in Japan have developed a prototype solid oxide fuel cell that operates with high energy efficiency at the relatively low temperature of 570°C, according to a report in the Nikkei Business Daily .
Abstract The composite model which has been created by Mughrabi, and developed by several other researchers, is analyzed with respect to high-temperature creep of Al and an Al– Mg alloy. Data for structural parameters such as local and global internal stresses, and dislocation densities have been obtained from X-ray l…
Abstract This paper presents a new model that accounts, on a local scale, for the coupling between plasticity due to gliding in shear bands and damage occurring when the accumulated plastic strain has reached a threshold value. The irreversible thermodynamics with internal state variables is employed to keep a middle…
We study how the composition of dolomite changes in its reaction with 0.1 N solutions of H 2 SO 4 , FeSO 4 , CuSO 4 , and ZnSO 4 , using X-ray diffraction and differential thermal analysis (DTA). The MgCO 3 concentration in the mineral decreases; the maximal decrease is observed in the reaction of dolomite with aqueou…
K2ZnGeO4 belongs to the ‘stuffed’ cristobalite structural type. The α-form (SG Pca21) changes to β-form (SG F 3m) above 1049 K by a displacive/rotational transformation with ferroelectric/ferroelastic character, in which the strain is only coupled with the order parameter. The distortion leading from β-HT to α-LT form…
Investigation of Optical and Electrical Properties of Pb(Zr1-xTix)O3 Thin Films on Different Substrates, Kafadaryan, Eugenia, Aghamalyan, Natella, Nikogosyan, Sergey, Shirinyan, Hovsep, Manukyan, Aleksandr, Hayrapetyan, Albert, Badalyan, Georgi, Song, Yang, Wu, Naijuan, Ignatiev, Alex
SrBi 2 Ta 2 O 9 (SBT) single crystals were produced by the high-temperature self-flux solution method using a Bi 2 O 3 flux modified with B 2 O 3 . The processing conditions were optimized to obtain large and translucent SBT crystals with a layered habit and typical dimensions of approximately 7 × 5 × 0.2 mm. X-ray di…
Platinized catalysts on various types of supports were tested in the catalytic decomposition of hydrazine in HClO 4 and HNO 3 solutions, where the process follows different pathways. In HClO 4 , the activity of the catalysts supported on a Termoksid ceramic material is higher than that of the catalysts supported on am…
We have newly developed an x-ray photoemission electron microscope (XPEEM) which uses both soft x-rays and hard x-rays at the undulator beam line BL15XU in the synchrotron radiation (SR) facility SPring-8 to observe various practical materials. In combination with an energy analyzer and high brilliant x-ray source, th…
In water tap production 0.5 mm of material needs to be ground off from the surface of LPDC (Low Pressure Die Casting) brass castings in order to remove the defects deteriorating the quality of later applied coating. In order to minimize the amount of removed material the causes of these defects need to be discovered a…
An unusual compound, H5[(C6NO2H4)4(H2O)15Nd3][IMo6O24]2·13.5H2O (1) has been synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis (TGA), and single crystal X-ray diffraction. Compound 1 consists of two [IMo6O24]5− units joined by a trinuclear neodymium-pyridine-4-carboxylic…
Development of superprotonic conductors of inexpensive and environmentally stable inorganic materials is important for clean energy fields such as H2-O2 fuel cells and hydrogen energy technology. We will show that gypsum (CaSO4·2H2O), normally an insulator, can be easily converted into a superprotonic conductor by a n…
The possibility of raising the yield of stabilized polymeric sulfur by rapid cooling of melts in the presence of previously unstudied complex systems including α,α,α,α′,α′,α′-hexachloro- p -xylene was examined.
The interaction of binary solid solutions with binary gallium eutectics is studied in situ by X-ray diffraction using synchrotron radiation to reveal the sequence of phase formation for the elements that leave a solid solution and a eutectic during the formation of the first intermetallic phase. A comparison of the ch…
The Raman and photoluminescence (PL) spectra of nanocrystalline zinc oxide produced by mechanochemical synthesis were measured using a pulsed nitrogen laser (337.1 nm) and xenon lamp (360 nm) as excitation sources in PL measurements and a cw Nd:YAG laser in Raman measurements. PL was observed in the range 400–800 nm.…
Foundations of cocarbonization of a series of carbon-chain and heterochain polymers in the solid phase and in solution were considered; the concept of this process was formulated. The temperature and kinetic parameters of the maximal thermal activity were determined. The possibilities of intermolecular interactions of…
Complex rare-earth molybdophosphates of sodium and potassium (Na 2 Yb(PO 4 )(MoO 4 ) ( I ) and K 2 Yb(PO 4 )(MoO 4 ) ( II ) are synthesized by solid-phase reactions at 600°C (for I ) and 750°C (for II ). The molybdophosphates are characterized using powder X-ray diffraction, laser second harmonic generation (SHG), IR…
The conditions of formation of local states in the energy spectra of semi-infinite carbon nanotubes with regularly arranged atoms adsorbed on the outer surface are studied in the π-electron approximation. The influence of the adsorption type (physical and chemical), the donor-acceptor properties of adsorbed atoms, the…
MnAs grows either with the (1100)prism-plane on GaAs(001), (113)A and (110) or the (0001) c-plane on GaAs(111)B substrates. The strain state of the films determines the phase coexistence of ferromagnetic α- and paramagnetic (3-MnAs and their distribution in self-organized structures. The mismatch accommodation mechani…
This study describes facile methods based on sol-gel processing for the formation of robust thin films that incorporate phospholipid bilayer membranes and transmembrane proteins as multilamellar assemblies in cross-linked silica matrices. Transmission electron microscopy and x-ray diffraction were used to examine the…