Materials Literature
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The photoluminescence spectra and kinetics of both erbium-doped and undoped multilayer structures of quasi-ordered silicon nanocrystals in a silicon dioxide matrix were studied. It was shown that the optical excitation energy of silicon nanocrystals 2–3 nm in size can be practically completely transferred to Er 3+ ion…
Epoxy nano-hybrids reinforced with cellulose fibre (CF), nano-kaolinite (K), and micro-ZrO2 (Z) have been synthesized. The influence of CF/K/Z dispersions on the mechanical properties of these hybrids have been characterized in terms of elastic modulus, hardness, flexural strength, fracture toughness and indentation r…
The antileukemic activity of the original conjugate of anthracycline antitumor antibiotic epirubicin, covalently bound to the biopolymer dextran was studied. The ascitic lymphoid leukemia L 1210 (transplantation dose 1x105 tumor cells/mouse, i. p.), in hybrid mice BDF1, was used as tumor model. An antileukemic activit…
TbFe2 films prepared by a flash evaporation system onto Si(100) or polyimide substrate have been irradiated with different Ar ion doses at zero, 1.3 × 1017 and 2.7 × 1017 cm−2 and at 10 kV. Magnetostrictive properties, i.e., saturated magnetostriction and magnetostrictive susceptibility, of TbFe2 film with disordered…
Polymer dispersed liquid crystals (PDLC) films doped by dichroic dyes (DD) with “polymer ball” morphology have been obtained. It has been shown that they possess a “memory effect”. The optical characteristics of PDLC films with the “memory effect” have been investigated. The possibility to use this effect for recordin…
CeO2-TiO2sol-gel thin coatings are known as transparent Li-ion storage electrode for electrochromic devices(ECD). As the charge capacity of the CeO2-TiO2coatings is a limiting factor to get a high coloration intensity of such devices, the knowledge of transport kinetics parameters is of great importance to understand…
Two new 3D open-framework cobalt tungsten phosphates, (enH2)3[Co3W4P4O28] and K6[Co3W4P4O28]·4H2O, have been hydrothermally synthesised and characterized by single-crystal X-ray diffraction, thermogravimetry, elemental analysis and IR spectroscopy. Their anionic frameworks, built up from corner sharing CoO4 and PO4 te…
Cotton fibers contain naturally occurring noncellulosic materials such as sugars, wax, metals, and other organicspecies that may significantly affect textile yarn manufacturing efficiency, processing performance, and quality. Chemicaland physical tests were conducted on raw cottons from different U.S. growing areas to…
A range of opal or transparent porous phosphosilicate glasses have been prepared by quenching melted mixtures of Moroccan natural phosphate, diatomite and/or dolomie. Their physical and chemical properties such as density, glass transition temperature, thermal expansion coefficient and chemical durability are studied…
Pure pervoskite phase Pb1.15(Zr0.53Ti0.47)O3(PZT) powders were prepared by a chelating acetate sol-gel process. Powders obtained from two different heating temperatures, namely as-dried H.T powders (573 K/30 min) and as-dried L.T powders (423 K/10 h) were analyzed. Both the powder samples were investigated by Fourier…
Results of studies of the effect of the buffer layer 1.3PbO 0.5ZrO2 0.5TiO2 (conditional composition is Pb1.3(Zr0.5Ti0.5)O3) on the properties of Pb(Zr0.5Ti0.5)O3 films on Ti and Pt substrates are considered. The films are obtained by metal organic deposition method (MOD). Films deposited on Pt substrate (with the buf…
Bismuth titanate, Bi/sub 4/Ti/sub 3/O/sub 12/ thin film pressure sensor was fabricated by sol gel method. The Bi/sub 4/Ti/sub 3/O/sub 12/ thin film was synthesized on substrate Si/ SiO/sub 2/ / RuO/sub 2/ at low temperature to avoid short-circuit problem. The film was obtained by depositing multiple Bi-Ti-O spin coat…
Silicon nitride thin film was fabricated by pulsed laser deposition using KrF excimer laser and a silicon nitride compact as a target. The deposition was carried out on Al2O3 (0001) at 1173 K in N2 gas pressure of 0.27 Pa. The X-ray diffraction did not provide any structural information of the deposited thin films exc…
Effect of adding cobalt on the shape memory properties of Ni-Mn-Ga sputtered films was investigated. It was found that the films containing cobalt less than 5.1 mol% has a single phase and those with more than 6.8 mol%Co has two phases. The Curie temperature increased and the saturation magnetization decreased with in…
The results of oxidation of surface layers of irradiated films made of low-density polyethylene (LDPE), isotactic biaxially oriented polypropylene (BOPP) and poly(ethylene terephthalate) (PET) are discussed. The films were modified in the air atmosphere using a high-energy electron beam generated by a linear accelerat…
Japan Atomic Energy Research Institute (JAERI) has been carrying out design studies of the Gas Turbine High Temperature Reactor (GTHTR300). The design study on fuel rod for the GTHTR300 has investigated two structural designs for fuel rod and corresponding fuel rod support structures. In the first design, the fuel rod…
We are investigating interactions between shocks and grain boundaries in the anisotropic alloy NiAl; as part of this work, we need to know the shock response of single crystals. The equation of state (EOS) and elasticity were predicted using ab initio quantum mechanics. NiAl crystals were obtained from GE, and also pr…
Among the components of disposable diaper, the top sheet contacting with baby skin directly is usually made of nonwoven fabrics. Therefore, the tactile properties of the nonwoven fabrics are important for the skin health of infants. In this study, we have explored the surface properties of hygiene nonwoven fabrics (10…
The feasibility of separation of impurities in refined bismuth and sulphur deleadization with vacuum distillation was studied theoretically. Experimental studies on sulphur deleadization were carried out under vacuum. The influences of amount of sulphur, distillation temperature, vacuum degree and distillation time on…
Polyvinyl chloride (PVC) powders with various chlorine (Cl) contents (49.5, 56.7, 64.0 and 69.5%) were mixed with NaOH pellets at a different Na/Cl molar ratio, and the mixture was ground in air by a planetary ball mill in order to investigate the mechanochemical (MC) dechlorination. The MC reaction formed NaCl and pa…