Materials Literature
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Gamma irradiation of p -GaS at 300 K has been shown to produce both donors and acceptors. Their effect on the electrical properties of p -GaS depends on the gamma dose and the defect system in the unirradiated material. Low gamma doses (30–50 krad) reduce the hole concentration, which is due to the compensation of nat…
Abstract The interface produced between a chlorinated thermoplastic styrene‐butadiene‐styrene rubber and a polychloroprene (PCP) adhesive has been studied and compared to the interface produced using a polyurethane (PU) adhesive. Chlorination of the rubber was produced by spin coating solutions of trichloroisocyanuric…
The deposition of polycrystalline ZnO film on a cold substrate was performed by using a plasmatron in rough vacuum condition. Low energy oxygen ion beam generated by a cold cathode ion source was introduced during the deposition process. The change of film property on the ion beam energy was checked. It is shown that…
The layer structure of Penrose tiling in the form of Wieringa roof is considered. It is found that each layer can be described by set of overlapped regular pentagonal stars. Local and global pentagonal symmetry of layers can be vividly presented if the stars will be chosen of less size. Linear size ratio of stars in d…
We investigated the microwave absorbing properties of composite bulk samples with nanostructured and micron-sized fillers. As magnetic fillers we used magnetite powder (Fe3O4 with low magnetocrystalline anisotropy) and strontium hexaferrite (SrFe12O9 with high magnetocrystalline anisotropy). The dielectric matrix cons…
Ternary-layered Ti3SiC2 ceramic was prepared by self-propagation high temperature combustion synthesis with pseudo hot isostatic pressing (SHS/PHIP). The effect of Ti/C mol ratio, Si content and Al content on the phase composition of the products was investigated. Experimental results showed that the phase composition…
The electrical conductivity, Hall coefficient, and thermopower of Cu 0.75 Ni 0.125 FeTe 2 have been measured between 80 and 500 K. The results have been interpreted in terms of a three-band model which takes into account, in addition to the conduction band, two overlapping valence subbands. We have determined the ener…
The aim of this study was to assess the T1, T2 and T2* relaxivity of Ultrasmall Super Paramagnetic Iron Oxide (USPIO) nano-particles in vitro and in vivo in rat models with magnetic resonance imaging at 1.5T. First, relaxation properties of USPIO nano-particles at different doses were measured using related SE and GRE…
Doping with low concentrations (∼0.01 at % and below) of Gd and Pb is shown to have little effect on the lattice thermal conductivity χ ph of extruded Bi 85 Sb 15 . This finding suggests that the χ ph of solid solutions can be determined using doping with low concentrations of electroactive impurities.
Photoelectron Spectroscopy Study of Photoresponsive Change in Electronic Structure of Amorphous Photochromic Diarylethene Film, Tanaka, Senku, Toba, Masaya, Nakashima, Takuya, Kawai, Tsuyoshi, Yoshino, Katsumi
HfB2-HfC-SiC ultrahigh temperature ceramics (UHTCs) were prepared and characterized in this paper. It is showed that the densities of the HfB2-HfC-SiC reach 98.5% of the theory density. The room temperature compressive properties of the HfB2-HfC-SiC are good, while those at high temperature decrease rapidly. The volum…
Corrosion fatigue behavior of 2205 duplex stainless steel (DSS [UNS S31803]) in 2 M sulfuric acid (H2SO4) + 0.7 M hydrochloric acid (HCl) solution at various loading frequencies and under selective dissolution conditions was investigated. The mechanical and chemical effects on the fatigue crack initiation as well as c…
We study the electrical properties of newly synthesized disk-shaped molecules, trihexyl benzene tricarboxiamides (T6B), in a crystalline phase. Our experimental results show that T6B exhibits displacement–external field hysteresis behavior and pyroelectric behavior. The residual polarization was the largest at 70 °C a…
Single phase Sialon was synthesized successfully from fly ash by carbothermal reductionnitridation reaction in this paper. The effects of synthesizing temperature (1200°C, 1300°C, 1400°C and 1450°C) and carbon content (stoichiometric content, exceeding 10%, 50% and 100%) on the final production were studied by XRD and…
The distinctive features of limited solubility in liquid eutectic and monotectic metallic systems have been discovered. The monodispersed emulsion model has been elaborated for a description of the specific microheterogeneous structure of eutectic melts. It includes the transitional shells (TS) at the interface bounda…
Dielectric behaviour of Sr 0.61 Ba 0.39 Nb 2 O 6 (61SBN) and Sr 0.75 Ba 0.25 Nb 2 O 6 (75SBN) single crystals has been studied. It is observed that 61SBN has relatively low diffuseness as well as smaller relaxation compared to 75SBN. Increase in the configurational entropy imposed by the change in defect structure is…
Compounds Yb2Mo3O12 and Lu2Mo3O12 were prepared by conventional solid-state reaction. Their crystal structures and thermal expansion properties were investigated. It was found that Yb2Mo3O12 and Lu2Mo3O12 adopt orthorhombic structure and show negative thermal expansion (NTE) in the temperature range of 200-800 °C. The…
Abstract Summary: The influences of short chain branching (SCB) and molecular (M w ) weight of low density polyethylene (LDPE) on the solid state properties of polypropylene (PP)‐LDPE blends were investigated by mechanical and thermal techniques. DSC analysis of all blends exhibit a double melting peak at all composit…
The interactions of two amphiphilic porphyrins with anionic surfactant sodium bis(2-ethylhexyl)sulfosuccinate (AOT) in aqueous solutions were studied by UV-vis absorption spectroscopy, fluorescence spectroscopy, resonance light scattering technique, fluorescence anisotropy and surface tension measurements. The two por…
Infrared to visible upconversion emission bands are observed in Nd3+: LiTeO2 glass at 430, 482, 525, 535, 580, 600, 664 and 766 nm wavelengths due to the 2P1/2 4I9/2, 2P1/2 4I11/2, 2P1/2 4I13/2, 4G7/2 4I9/2, 2P1/2 4I15/2, 4G7/2 4I11/2 & 4G5/2+2G7/2 4I9/2, 4G7/2 4I13/2 and 4G7/2 4I15/2 transitions, respectively. Mechan…