Materials Literature
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Planar defects in the metastably retained h‐BaTiO 3 exhibiting α‐fringe pattern have been characterized via transmission electron microscopy (TEM). The eligible fault vectors were determined by adopting the invisibility criteria of 2πg·R = 0 or 2 n π augmented by high‐resolution imaging. Three stacking faults, F 1 , F…
This paper presents an experimental study of a tracking control of a shape memory alloy (SMA) wire actuator using a nonlinear robust compensator. The control design uses the sliding-mode approach and requires no detailed information about the SMA model. To test the effectiveness of the proposed controller, experiments…
Three-dimensional networks with periodicity of several nanometres consisting of platinum crystallites have been examined by a combination of transmission electron microscopy, electron diffraction and high-angle annular dark-field scanning transmission electron microscopy. It has been clarified that the average three-d…
Lasing behavior has been studied in cholesteric liquid crystals (CLCs) doped with three oligothiophene (OT) derivatives such as α,α'-dimethylquaterthiophene (DMQtT) as laser dyes. CLCs spontaneously form a distributed feedback cavity, in which OT molecules are highly oriented parallel to the local director of CLCs wit…
The improvement of the piezoelectric properties of low-temperature-fabricated 0.375Pb(Mg 1/3 Nb 2/3 )O 3 -0.25PbZrO 3 -0.375PbTiO 3 (PMNZT) ceramics with a LiBiO 2 sintering aid was investigated by adopting a post-annealing process. The sinterability of PMNZT powders was markedly enhanced by liquid phase sintering wit…
Polypropylene composites reinforced with continuous and unidirectional polyester fibers were prepared by the powder method. Three different polyester fibers with different mechanical properties were used. The composite mechanical properties showed a clear influence from the synergistic combination of the fiber propert…
A copolymer of L-lactide and ∊-caprolactone ( M n: 73,523, M w: 127,990 and PI: 1.74) was synthesized by ring-opening polymerization and confirmed by FTIR, 1 H-NMR and DSC. The copolymer ratio of L-lactide to ∊-caprolactone, determined by 1 H-NMR, was 89/11. Specific amounts of hydroxyapatite or tricalcium phosphate w…
Abstract A series of aqueous polyurethane dispersion were prepared by the reaction of hydroxyl‐terminated poly(ethylene adipate), dimethylol propionic acid, 4,4′‐diphenylmethane diisocyanate, and ethylene glycol. Formation of the dispersion was achieved by phase inversion of an acetone solution of the polyurethane wit…
The magnetic configurations of the Wendelstein 7-X (W7-X) stellarator are sensitive to perturbations of the magnetic field resonant with ι/2π = 1. Such perturbations can be caused by deviations of the current filament positions of the real coil system from the design due to the accuracy achievable during the manufactu…
Pr 3+ ‐doped YF 3 (orthorhombic), YO 0.80 F 1.40 (orthorhombic), YOF (rhombohedral), and Y 2 O 3 (cubic) films were synthesized on quartz‐glass substrates through pyrolysis of a single‐source trifluoroacetate precursor at temperatures between 400° and 900°C in air. Phase‐selective deposition was achieved by controllin…
With the object of verifying the presence of a region of anomalous iron compressibility at negative pressures, as predicted by the ab initio calculations, the reflection of compression pulses from the surfaces of iron single crystals was detected. No evidence of the expected formation of rarefaction shock waves was ob…
We examined a mechanical polishing technique for multiwalled carbon nanotube (MWNT) vias. This polishing technique involved the use of diamond particles fixing MWNT protrusions of the samples. The 1-µm-high outthrust MWNTs were polished, and then flat sample surfaces were obtained by controlling polishing pressure and…
This paper describes the magnetic properties of NiZnCu ferrite film deposited at room temperature by an aerosol deposition method (ADM). The thickness of the film was 6 μm and the deposition rate was estimated as 2 μm/min. The microstructure of as‐deposited at room temperature films consists of randomly oriented nanoc…
Abstract This paper focuses on the deposition process and the semi‐conductive properties of PPy layers on steel. The polymerisation of PPy was performed galvanostatically on steel in an aqueous solution of 0.1 M pyrrole and 0.1 M oxalic acid (H 2 C 2 O 4 ) using a current density of 1 mA/cm 2 . The build‐up of a ferro…
Abstract Generally, plastics and plastic films are low in moisture absorption and high in electric insulation. They are inherently vulnerable to static charge build‐up, which can result in a variety of problems. We have developed a functional packaging material to solve these static problems, by using a potassium salt…
Abstract We have investigated a method of preparing a large‐size anisotropic polypyrrole (PPy) film using a slab vessel consisting of poly(tetrafluoroethylene) (PTFE) walls as well as its actuation abilities. The PPy film can be grown along one side of the PTFE walls and exhibits morphological anisotropy of the PPy pa…
The growing popularity of wooden panels renders this market segment increasingly competitive. MDF (Medium Density Fiberboard), in particular, is widely employed for a variety of applications, including civil construction, furniture, and packaging. This paper discusses a study of MDF produced from alternative raw mater…
Interface reactions in WO3∕metal thin-film bilayered structures were examined for applications to optical recording materials. Decreases in the reflectance of the structures caused by temperature elevation were observed and were attributed to (i) coloration of the WO3 layers, and (ii) decreases in the reflectance of t…
Bubble behavior and the radiation mechanism from a laser-induced collapsing bubble were investigated theoretically using the Keller–Miksis equation for the bubble wall motion and analytical solutions for the vapor inside the bubble. The calculated time-dependent bubble radius is in good agreement with observed ones. A…
All-thermoplastic sandwiches with composite faces and thermoplastic foam as core material present great potential for future automotive mass applications. They offer many advantages such as high specific bending stiffness, good insulation properties, high impact resistance,... Furthermore, the use of one single polyme…