Materials Literature
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Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 (PMN–PT) (70/30) thin films were deposited by pulsed laser deposition using two growth strategies: adsorption controlled deposition from lead‐rich targets (∼25–30 mass%) and lower‐temperature deposition ( T d ≤600°C) from targets containing a small amount of excess lead oxide (≤3 mass %)…
The use of calcium-based stabilizers such as calcium oxide (lime) in sulfate-bearing clay soils has historically led to structural distress because of the formation of a mineral called ettringite and possibly thaumasite. In trying to control the damage associated with such formations, engineers have attempted to deter…
High quality sol-gel derived ZnO and ZnO:Al thin films were deposited on corning (7059) glass substrates by spin coating. The annealed films showed the c-axis-preferred orientation. The structural, electrical, and optical properties of the films were investigated as a function of Al concentration from 0 to 3.0 at. %.…
The oxygen transmission rate (OTR) of packaging materials used for modified atmosphere packaging (MAP) of chilled products varies extensively with temperature, relative humidity (RH) and material thickness after the thermoforming of packages. Two different polymer combinations were studied: APET/PE (tray) and PA/PE (l…
Weld samples of fusion reactor vanadium alloy (NIFS-HEAT-2) were neutron-irradiated at 563 K up to 4.5×1023 neutrons/m2 (0.08 dpa). The recovery of irradiation hardening, degradation of impact properties, and damage structures in the weld metal were investigated after post-irradiation isothermal annealing at temperatu…
3,3′,4,4′-Diphenylsulfonetetracarboxylic dianhydride (1) was reacted with L-isoleucine (2) in acetic acid and the resulting imide-acid (3) was obtained in high yield. The diacid chloride (4) was prepared from the diacid derivative (3) by reaction with thionyl chloride. The polycondensation reaction of diacid chloride…
We report on the upconversion luminescence of a pure YVO4 single crystal excited by an infrared femtosecond laser. The luminescent spectra show that the upconversion luminescence comes from the transitions from the lowest excited states 3T1, 3T2 to the ground state 1A1 of the VO4 3-. The dependence of the fluorescence…
In the absence of moisture and at room temperature, the activity and saturation of CO on gold cluster anions, Au(N)-, are known to be highly dependent on the size of the cluster. Small Au(N)- clusters (N = 2,3) showed no adsorption activity, and the saturation CO adsorption values did not increase proportionately to c…
Amorphous silica and related silica-based materials have been widely developed in optoelectronics and optical telecommunications technology. Despite comprehensive research for over the decades, the subject of amorphous silica continues to excite the interest of researchers in the field of chemistry, physics, and geolo…
Y2O3:(Eu,B) red phosphor was obtained by a thermal decomposition technique of a mixture of yttrium–ethylenediaminetetraacetic acid (Y–EDTA), Eu–EDTA and boric acid. The doping ratio of boron, [B]/([Y]+[Eu]), in the starting material was varied from 0 to 1. The properties of morphology, crystallization behavior, metal…
In this paper we report the synthesis and characterisation of the perovskite cuprate phases YSr2Cu2MO7+y (M = Co, Fe) in order to examine their potential for use as cathode materials in solid oxide fuel cells (SOFCs). Both samples showed conductivities of ≈10 S cm−1 at 900 °C and were also shown to be stable at this t…
Metal-oxide interfaces of three different materials irradiated in a pressurized water reactor have been analyzed by TEM and AEM. Standard Zircaloy-4. low-tin Zircaloy-4. and Zr-2.5%Nb were used for this study. The microstructure of the material on the two sides of the metal-oxide interface, the geometry of the interfa…
We report a new type of 2,2'-bipyrrole derivatives that bear four aryl groups at the 1, 1', 5 and 5' positions.These compounds were synthesized by two routes: (i) the reaction of 1,8-diaryl-2,7-ditosyl-1,7-octadiene-3,5-diynes (4) with anilines was performed in the presence of CuCl at 150 o C; (ii) the above compound…
A novel one-step solvothermal process has been developed for the preparation of Eu 3 + actived yttrium oxysulfide phosphor in ethylenediamine solvent at 280 ° C through a reaction of yttrium oxide, europium oxide, and sulfur powder. The products were characterized by X-ray diffraction, photoluminescence, and scanning…
reacted with s-valine (2) in acetic acid and the resulting imide-acid [N,N'-(pyromellitoyl)-bis-s-valine] (4) was obtained in high yield. The compound (4) was converted to the N,N'-(pyromellitoyl)-bis-S-valine diacid chloride (5) by reaction with thionyl chloride. The polycondensation reaction of this diacid chloride…
A series of spiropyrans possessing photochromic properties in solid state were investigated. UV irradiation ( λ max = 365 nm) of the thin vacuum deposited spiropyran films results in conversion of the colorless form to the photocolored one. The reaction is photochemically and thermally reversible. The photochromic act…
The investigations presented show that pulling a disc-shaped specimen through the rounded hole can be considered as a perspective test method for textile hand evaluation. It was de- termined that the process of pulling a comparatively big specimen (∅ 113 mm) through a relatively small hole (∅ 20-40 mm) ends in the for…
Chitosan is a biocompatible and biodegradable natural polymer with established antimicrobial properties against specific microorganisms. The present study demonstrates its antibacterial activity against 48 isolates of Vibrio species from prawn larval rearing systems. The antibacterial activity had a positive correlati…
The Ce <sub>x</sub> Ba <sub>1−x</sub> MnAl <sub>11</sub> O <sub>x</sub> catalysts are synthesized in reverse microemulsions using inexpensive inorganic salts as precursors, which have high surface area and high activity for methane combustion.
The influence of solid insulating barriers to the impulse strength of air gaps has been investigated by few researchers. It is well known that thin insulating materials increase considerably the breakdown voltage, sometimes two to three times. Some researchers performed thorough investigations for the determination of…