Materials Literature
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Wavelength-resolved TSL measurements after x-ray irradiation at room temperature were performed on undoped, Ce- and (Ce, Zr)-doped Lu 3 Al 5 O 12 crystals. Several glow peaks were observed in the 20-450 v C temperature region, whose intensities and emission spectra are influenced by doping. Namely, the TSL spectra are…
Insertion of sodium into phosphates Na_3M_2 (PO_4)_3 (M=Fe, V) were investigated electrochemically to determine the usefulness as the possible cathodes for sodium batteries. The discharge curves show that sodium ion can be accommodated into these hosts. Specific charges of up to 45mAhg^<-1> and 140mAhg^<-1>…
The thermal diffusivity and specific heat of superplastically deformed 3Y-TZP specimens were measured in a temperature range from 298 to 1273 K . From these data, the thermal conductivity has been evaluated and discussed. A weak temperature dependence of the thermal conductivity was observed. The thermal conductivity…
phosphors doped with different concentrations of Eu were fabricated by a high-temperature flux fusion method. For applications in field emission displays, phosphor powders were electrophoretically deposited on an indium-tin oxide coated glass substrate to form a phosphor screen. Cathodoluminescence properties of phosp…
The following sequence of phase transformations is observed in the Nd0.6Ca0.4(Mn1−xCrx)O3 system: antiferromagnet (x=0), mixed magnetic state (0.015⩽x⩽0.04), ferrimagnet (0.04⩽x⩽0.8), and spin glass (x=1). At chromium concentrations near x∼0.5 the Néel temperature increases sharply, and the contribution from the Nd su…
Duplex stainless steels, with ferritic-austenitic microstructure, have excellent mechanical properties and corrosion resistance. However, when duplex stainless steels are exposed to temperatures between 600 and 1000 °C, some phase transformations can occur such as chromium nitrides precipitation, chromium carbides pre…
The initial and boundary value problem is studied for a non-conserved phase-field system derived from the Penrose-Fife model for the kinetics of phase transitions. Here the evolution of the order parameter is governed by a nonlinear hyperbolic equation which is characterized by the presence of an inertial term with sm…
Eu2+activated Sr2Al6O11 and Sr4Al14O25 were prepared with B2O3 additives at the temperatures of 1100°C to 1300°C in flowing 5% H2/Ar gas. These products were characterized by XRD analysis, UV and VUV spectroscopy and so forth. The precise crystal structure of Sr2Al6O11 was first determined by Rietveld method. Between…
The oxygen permation fluxes through (BICUVOX.10) ceramics were measured as functions of oxygen chemical potential gradient and temperature, in the 823-923 K range. The influence of the deposition of a composite on one or both surfaces of the membranes was evaluated. Due to the small oxygen exchange coefficient on the…
This paper reports on measurement of the temperature dependences of the following transport coefficients: electrical conductivity in the σ 11 cleavage plane, the Seebeck coefficients S 11 and S 33 (axis 3 is along the trigonal crystal axis), the Hall coefficients R 123 and R 321 , and the Nernst-Ettingshausen constant…
Abstract For the first time, Raman and IR studies were performed on new double tungstates Li 2 M II (WO 4 ) 2 (M = Co, Ni and Cu) crystallizing in the wolframite‐type structure. The observed vibrational modes were assigned to the respective motions of atoms in the unit cell. The vibrational properties of the Cu deriva…
Bismuth subcitrate is a known nephrotoxic agent that may lead to acute oliguric renal failure when ingested in toxic doses. We report a 17-year-old girl who was admitted to the emergency room with complaints of nausea, vomiting, and anuria. She had taken 25 tablets containing 300 mg bismuth subcitrate (total 7.5 g). T…
A theoretical study is made of the structure of magnetic inhomogeneities and the spectrum of spin waves in antiferromagnets with a magnetoelectric effect. It has been established that the interaction of the inhomogeneous magnetic momentum M with the sufficiently strong magnetic field H along the "easy" axis leads to t…
Results are reported of an experimental investigation of penetration rate and penetrant concentration profile, in the PMMA−methyl alcohol (MA) system. Penetration of liquid MA, at 22, 30, and 40 °C, along annealed or quenched films sandwiched between glass plates, was followed microscopically, and the corresponding co…
The influence of the temperature of liquid aluminum alloy, the dipping time in liquid alloy and the thickness of base strips on the solidified layer was studied during the process of producing aluminum alloy composite strips used in automobile radiator with inversion casting. It is concluded that there is welding as w…
Colored crystals of the middle term (a = 1) of the Bi2−aRaGeO5 series (R = Y (yellow), Yb (brown)) have been grown. The structure of these materials has been established by single-crystal X-ray diffraction. They are isostructural and crystallize in the orthorhombic system, space group Pbca (No. 61), Z = 8, with unit-c…
Improved patency in vein grafts harvested with surroungding tissue: results of a randomized study using three harvesting techniques.
When restoring abandoned pastures on acidic hill-land soils to productivity, it is important to bring soil Ca and Mg to adequate levels. Gypsum is a readily available Ca amendment that is sufficiently soluble to move rapidly into the soil when surface-applied. Gypsum has been shown to reduce detrimental effects of sub…
The electrical conductivity of water used in papermaking tends to increase over time due to water conservation efforts. This study concerns the effect of changes in conductivity on the amounts of highly charged cationic polymers required to neutralize the surfaces, as measured with a fiber-pad streaming potential meth…
The addition of a coupling agent to silica-rubber compounds enhances the filler-matrix compatibility. Under certain mixing conditions the surface of the filler may be only partly activated, which may have an adverse effect on the properties in the final product. A mixing temperature of at least 130°C is necessary to e…