Materials Literature
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We measured conducting and magnetic properties of (ET)4[Ln(NCS)6]·CH2Cl2 (Ln = Dy, Ho, Er, and Yb), (ET)5[Ln(NCS)6NO3]·EtOH (Ln = Tb and Dy), and (TTF)6[Dy(NCS)6]. All of the complexes behaved as semiconductors irrespective of Ln ions used, and also exhibited anomalous frequency-dependence of ac magnetic susceptibilit…
Hydrothermal synthesis of nano ZrO2 powders were carried out at a temperature range of 100 to 200°C, using zirconium solution. Formation of ZrO2 formation was accelerated with temperature and precipitation of ZrO2 took place directly from the solution. XRD analysis revealed that monoclinic ZrO2 was formed at all condi…
The passive oxidation mechanism of CVD SiC was discussed from experimental results with high-temperature thermogravimetry and thermodynamic analyses. The bubble formation temperature around 1900 K could be too low for an oxygen inward diffusion limited process but conform to a CO outward diffusion limited process. The…
Abstract The numerical simulation of structures made of shape memory materials is of increasing interest in different fields. Among others, the computation of pipe connectors or medical devices like endoscopic instruments and stents is a challenge. In such practical applications the pseudoelastic effect as well as the…
We present a model of homoionic, equal-spin ${s}_{1}$ dimer single molecule magnets exhibiting ${D}_{2h}$, ${C}_{2v}$, or ${S}_{2}$ molecular group symmetry, focusing upon the simplest ${D}_{2h}$ case. The spins within each dimer interact via the Heisenberg and the most general set of four quadratic anisotropic spin i…
Development and use of high-speed steels for manufacturing the roll outer shell of hot strip mills represented a major recent technological advancement in the hot rolling field. However, it was observed that the oxidation behavior of these steels was different from that of conventional rolls. The high-speed steel oxid…
Using twelve novel SMA (shape memory alloy) linear actuators, which can stretch and shrink along its axis and can bear some radial force and bend, a miniature worming robot with a cubic form was presented. By imitating earthworms' walking method and adopting a unique turning method, this robot can walk in pipelines fo…
The basic advantageous properties, e.g. low hydraulic conductivity and high swelling pressure, of the bentonite buffer in a KBS- repository stem from a strong interaction between water and the montmorillonite mineral in the bentonite. Minerals similar in structure but with substantially lower mineral-water interaction…
The recently discovered poling-assisted bleaching of glass with embedded silver nanoparticles has renewed the interest in thermal poling as a simple, reliable, and low-cost technique for controlling locally the surface-plasmon-resonant optical properties of metal-doped nanocomposite glasses. In the present study, the…
Dielectric molecular probes are employed to assess the averaging required for a transition from heterogeneous to more hydrodynamic rotational behaviour in supercooled liquids. The degree of averaging is controlled by the size of the probe molecule relative to the liquid constituents. Larger solutes exhibit longer time…
When ${\mathrm{Sr}}^{2+}$ ions in ${\mathrm{Sr}}_{2}\mathrm{Mn}{\mathrm{O}}_{4}$ containing only ${\mathrm{Mn}}^{4+}$ ions were partially replaced by ${\mathrm{La}}^{3+}$, a new phase having orthorhombic symmetry appeared around an La content of $x=0.15$ between the tetragonal $I4∕mmm$ $(T)$ phase and the charge and o…
In this work, thermal transport in nanocrystalline materials is studied using large-scale equilibrium molecular dynamics simulation. Nanocrystalline materials with different grain sizes are studied to explore how and to what extent the size of nanograins affects the thermal conductivity and specific heat. Substantial…
Growth temperature induced changes in Al∕Fe thin film catalysts are examined for chemical vapor deposition of carbon nanotubes directly on metal substrates. The film thickness, growth temperature, and supporting substrate affect the size and the density of Fe catalyst nanoparticles which in turn control the diameter,…
The Master Sintering Curve (MSC) is quite useful for analyzing the shrinkage behavior of ceramics. It is possible to compare shrinkage behavior using MSCs that are obtained from different firing profiles. In this study, shrinkage behavior during sintering of green bodies of several kinds of Al2O3 based ceramics were e…
The stationary self-polarization field of a thin film in an open circuit is analytically solved for temperatures near the para-/ferroelectric transformation within the Ginzburg-Landau theory. For second-order ferroelectrics, or first-order ferroelectrics with a sufficiently large elastic self-energy of the transformat…
Estimation of void formation in oxide scale is important for predicting exfoliation of the oxide scale. Void formation in magnetite scale formed on iron at 823 K has been elucidated by chemical potential distribution, flux of oxide ion and its divergence. This calculation also estimates a effective diffusion coefficie…
Highly (110) preferred orientated antiferroelectric PbZrO3 (PZ) and La-modified PZ thin films have been fabricated on Pt∕Ti∕SiO2∕Si substrates using sol-gel process. Dielectric properties, electric field induced ferroelectric polarization, and the temperature dependence of the dielectric response have been explored as…
Hardness of oxide scales on Fe-(0, 0.5, 1.5, 3.0)Si alloys was studied at room temperature after oxidation at 1273 K for 18 ks in oxygen, and at 1073 and 1273 K for 180 and 1080 ks in dry air, by micro-Vickers hardness measurements. After oxidation at 1273 K for 18 ks, high-temperature hardness of oxide scales on Fe-(…
Density functional theory (DFT) is widely used in surface science, but for some properties the predictions depend strongly on the approximation used for exchange–correlation energy. We note recent suggestions that the widely used generalized gradient approximation (GGA) is inferior to the local density approximation (…
The extruded honeycomb supports, porous filters and catalyst monoliths are innovative ceramic products used in environmental protection. The development and applications of these novel materials and products are mainly driven by the environmental legislation in the region, the availability of technology, the mass manu…