Materials Literature
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Abstract The presence of citric acid in decontamination waste can cause complexation of radioactive cations, resulting in interferences in their removal by various treatment processes such as chemical precipitation and ion exchange, and may pose a potential danger to the environment. Mesoporous Fe‐MCM‐41 molecular sie…
Ti O 2 nanoparticles doped with 1%, 5%, and 10% M (M=Co, Fe, and Ni) were prepared by microwave irradiation and characterized using x-ray diffraction, transmission electron microscopy, and magnetometry. The as-prepared samples are found to be paramagnetic at room temperature, with the magnetic susceptibility following…
We have investigated the growth of BiSbTe3 films by metal organic vapor phase epitaxy on (001) GaAs vicinal substrates. A detailed experimental study of the surface morphologies of BiSbTe3 films grown on GaAs (001) vicinal surfaces was carried out and is discussed in this paper with a view to understanding the step-st…
Submerged Arc Welding (SAW) is one of method for welding process which used for the extensions of heavy construction, for example bridge construction. Broadness usage of SAW caused by welding process can be done automatically and have high reliability. Microstructure and toughness properties of weld metal were influen…
Materials have very important influence on the environmental impact of the product life cycle from production to disposal and recycling. The environmental factors should be considered when product materials are selected, in order to improve the environmental friendliness of products. Due to the complexity of product m…
Nonlinear fitness–space–structure adaptation and principal component analysis in genetic algorithms: an application to x-ray reflectivity analysis, Tiilikainen, J, Tilli, J-M, Bosund, V, Mattila, M, Hakkarainen, T, Airaksinen, V-M, Lipsanen, H
End‐linking poly(dimethylsiloxane) was used to prepare bimodal elastomers networks so as to have inhomogeneous nanostructures, and also to prepare others having very broadly multimodal chain‐length distributions. Macroscopic phase separation, probably high crosslink density clusters, was observed to occur in some of t…
This paper presents a throughout spectroscopic investigation of Yb3+∕Tm3+ codoped sodium aluminophosphate glasses in the visible and near-infrared spectral regions. Two sets of samples, prepared in air and nitrogen atmospheres, were characterized by transmission, absorption, luminescence, excited state lifetimes, and…
Thermally induced relaxation of the magnetization of single domain ferromagnetic particles with triaxial (orthorhombic) anisotropy in the presence of a uniform external magnetic field H0 is considered in the context of Brown’s continuous diffusion model. Simple analytic equations, which allow one to describe qualitati…
We have discovered that traditional long-type magnetoelectric laminate composite of magnetostrictive Tb1−xDyxFe2−y and piezoelectric materials possesses additional ability of detecting dc magnetic field, using the product effect of the Lorentz force effect from Terfenol-D metal strips in dc magnetic field applied with…
The influence of direct current field (DCF) on powder-pack boriding has been investigated by applying DCF between boriding agent and specimen during the soaking. Experimental results show that DCF has the function of heating the agent and the specimen and thus enhancing boriding. It is shown that the specimen’s side f…
The hitherto unavailable free-base tripyrrins HTrpy have been prepared by cyanide promoted demetallation of a nickel(ii) tripyrrin and by acid-induced condensation of a diformylpyrrole and an alkylpyrrole with a sterically shielded alpha-position.
In this paper, we present the conductivity and dielectric characterization of three homologous series of smectic A siloxane containing liquid crystals. The materials studied include one monomesogenic series, which consists of a 4-(ω-alkyloxy)-4′-cyanobiphenyl unit terminated by pentamethyldisiloxane, and two bimesogen…
The coercivity mechanism of the precipitation-hardened Sm(Co,Fe,Cu,Zr)z magnets at different temperature have been investigated by micromagnetic calculations. It was found that the coercivity mechanism varies with the temperature. The magnetization reversal is mainly controlled by domain-wall pinning when the temperat…
p -nickel oxide (NiOx)∕n-indium tin oxide heterostructure p-n junction diodes were fabricated on glass substrates and showed rectifying characteristics or negative differential resistance (NDR) characteristics depending on the content of oxygen in the NiOx films. After annealing the heterojunction diodes at 450°C in a…
Active site structure for NO decomposition carried out on perovskite-like oxides were discussed based on the N 2 yield measured from LaSrNi 1- x Al x O 4 with different B-site cations and from La 2- y Sr y CuO 4 with different crystal phases. Results show that the active site contains two oxygen vacancies, two transit…
Generation of singlet oxygen due to energy transfer from photoexcited silicon nanocrystals in D2O is demonstrated. It is shown that the singlet oxygen generation efficiency, i.e., the intensity of near-infrared emission from singlet oxygen gradually decreases when Si nanocrystals are continuously irradiated in O2-satu…
It has been shown over the past ten years that the dynamics close to the glass transition is strongly heterogeneous: fast domains coexist with domains three or four decades slower, the size of these regions being about 3 nm at T(g). The authors extend here a model that has been proposed recently for the glass transiti…
An unusual Ni(II)(16)Na(I)(2) cluster which features formate as a bridging clamp between two octanuclear nickel cages is reported; preliminary magnetic studies exhibit paramagnetic low-lying states resulting from dominating antiferromagnetic interactions between the nickel(II) centers.
An atomic structure-based model for high-temperature lattice conductivity is developed for both compact crystals and cage-bridge crystals. For compact crystals, where long-range acoustic phonons dominate, the Debye temperature TD and Grüneisen parameter γ are estimated using interatomic potentials to arrive at the lat…