Materials Literature
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Abstract The crystal structure of sodium bismuth titanate, Na 0.5 Bi 0.5 TiO 3 , as a function of pressure is reported. From a combination of neutron powder diffraction experiments using the instrument POLARIS at the ISIS pulsed neutron facility and synchrotron X-ray powder diffraction experiments at ID30 at ESRF, it…
The properties of particle-stabilized emulsions, especially with regard to phase inversion, are very dependent on the contact angle that the particles experience at the oil-water interface. For the very small particles used for such emulsions (often a few tens of nm), it is impossible to measure this contact angle dir…
This paper presents an experimental study of the effects of elastane draw ratio, pre-setting temperature and finishing process on the penetration forces of a sewing needle and damage to the elastane fibre during the sewing of cotton/elastane woven fabrics. Seam strength and seam opening strength of the fabrics were al…
We describe a method of modeling of the dynamics characteristics for linear oscillating motors. We used electromagnetic finite-element analysis in the network model, which contains the electric circuit and mechanical equations. We compared the integral parameters of the electromagnetic field with the measured ones. We…
Phase-separated Al–Si films composed of Al nanocylinders embedded in an amorphous-Si matrix have been prepared by a sputtering method. By controlling the deposition rate, substrate temperature, and film composition, the average diameter of the Al cylinders can be varied systematically from less than 5to13nm with a cyl…
It is found that rapid oxidation of porous Si ( por -Si) layers in air may occur in the form of combustion or explosion. Combustion occurs in por -Si layers thinner than 60 μm and impregnated with potassium nitrate, while explosion is observed in thicker porous layers. It is suggested that explosion develops by a ther…
Systematic series of lead-bismuth phosphate glasses, where PbO, Bi2O3 and P2O5 content change for every series based on their weight percentage have been prepared. The optical properties were measured and their amorphous nature was confirmed by X-ray diffraction technique. Both experiments were conducted at room tempe…
Abstract Self‐assembly is a promising route to producing materials and other chemical products with unprecedented functionality for biomedical, electronic, catalytic and separation process technologies. However, self‐assembly will not achieve its full potential unless it is taken seriously as a manufacturing process,…
The controllability of specific domain structures in KNbO3 single crystals was investigated by electric poling to several different orientations at room temperature. By applying electric field to the direction corresponding to the differetial direction between the original and intended spontaneous polarization directi…
Equilibrium isotherms for the adsorption of H2, HD, HT, D2, DT and T2 on synthetic zeolite type 5A or 13X at 77.4 K are estimated by using a theoretical formula, where the isotopic difference in adsorption depends on the zero-point energy difference between hydrogen isotopes. The formula agrees with the experimental i…
The dielectric and piezoelectric properties for bismuth-based perovskite system (1−x)Bi(Ni2∕3Nb1∕3)O3–xPbTiO3 (BNN–PT100x) with x=0.6–0.95 were investigated. High-density polycrystalline ceramics were fabricated using a conventional solid-state reaction method. Morphotropic phase boundary (MPB) at x=0.625–0.65 composi…
Electrochemical oxidation of ethanol at nickel electrodes has been studied in 1 M KOH solution containing 0.20M ethanol using electrochemical impedance spectroscopy. Equivalent circuits have been worked out by simulating the impedance data, and the results were used to model the oxidation of ethanol as well as the pas…
Abstract Our approaches to the molecule-based magnets by using heterospin systems are reviewed. In our heterospin systems consisting of the organic 2p spins and the metal ion 3d spins, various pyridines carrying the organic spins were used as binding ligands for 3d metal ions. Carbenes generated by photolysis of diazo…
Abstract A constant pH precipitation method has been applied to obtain solids with Ni/Fe molar ratios of 2/1, 3/2, 1/1, 2/3, and 1/2. In all cases, a phase with the hydrotalcite‐like structure is obtained, containing Ni II and Fe III in the brucite‐like layers and carbonate in the interlayer, and, for samples with a N…
The high-pressure (to 5 GPa) effect on the crystal and magnetic structures of the hexagonal manganite YMnO 3 is studied by neutron diffraction in the temperature range 10–295 K. A spin-liquid state due to magnetic frustration on the triangular lattice formed by Mn ions is observed in this compound at normal pressure a…
One of the design targets for the Tokamak Exhaust Processing (TEP) system of ITER is not to lose more than 10-5gh-1 into the Normal Vent Detritiation system of the Tritium Plant. The plasma exhaust gas therefore needs to be processed in a way that a tritium removal efficiency of about 108 with respect to the flow rate…
Effects of annealing temperature on the structural and dielectric properties of sol–gel derived TiO 2 thin films were systematically investigated. Thin films annealed at various temperatures showed pure or mixed phases of anatase and rutile. As-deposited films started crystallization below 600°C and fully crystallized…
Abstract In this work industrial scraps of poly(ethylene terephthalate) (PET) were used for the production of foamed sheets. The process was performed by making use of a chemical blowing agent (CBA) in the extrusion process. Due to the low intrinsic viscosity of the recycled PET (IV=0.48dl/g), a chain extender was als…
Molecular dynamics simulation is performed to investigate self-insertion behaviors of peptides into single-walled carbon nanotubes (SWCNTs) in water environment. Peptides of different hydrophobicities and varied lengths are tested to show that the propensities of peptides to self-insert into SWCNTs differ drastically.…
Brownian dynamics simulations of the behavior of suspensions of fibers demonstrate that the scaling of the rotational diffusivity with respect to the number density (nL3) is a sensitive function of the thickness and the parameter L2D(R0)/D(T0), where D(R0) is the rotational diffusivity at infinite dilution, D(T0) is t…