Materials Literature
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The microstructures of diffusion-bonded Cu/(0001)Al2O3 bicrystals annealed at 1000 degrees C at oxygen partial pressures of 0.02 or 32 Pa have been studied with various microscopy techniques ranging from optical microscopy to high-resolution transmission electron microscopy. The studies revealed that for both oxygen p…
Abstract The crystal structures of 2-isopropyl-benzisothiazol-3-one-7-carboxylicacid isopropyl amide and of the corresponding selenium and tellurium derivatives have been determined. In contrast to the sulfur and selenium compounds, the tellurium derivative has an unprecedented three-dimensional network structure held…
In this paper, the effect of nonsinusoidal supply voltage on the core loss and the transformer excitation current is investigated. The time-domain waveform of the transformer excitation current is calculated for a worst-case harmonic composition of supply voltage.
Undesirable effect of asymmetric drape often occurs when cutting patterns of flared skirt on cross. Out of this reason garment seams twist toward the front or back or folds form different shapes on each side of the garment and this lowers garment aesthetic appearance. The new measuring procedure for asymmetric skirt d…
We report that tissue-like structure can be formed when cells are cultured on a microporous polymer film (honeycomb film). The honeycomb films were fabricated by applying a moist air to a spread polymer solution containing biodegradable polymers (poly(L-lactic acid) (PLLA) and poly(ε-caprolactone) (PCL)) and an amphip…
Two calcium‐doped α‐SiAlON compositions (Ca 0.6 Si 10.2 Al 1.8− O 0.6 N 15.4 and Ca 1.8 Si 6.6 Al 5.4 O 1.8 N 14.2 ) were prepared by hot pressing at 1600° and 1500°C, respectively, for complete phase transformation from α‐Si 3 N 4 to α‐SiAlON. Both samples were subsequently fired at different temperatures for differe…
Abstract The hydrothermal stabilities of a low-Fe clinochlore and a high-Mg chamosite, in the presence of kaolinite, were investigated recently at T ⩽ 200°C and <mml:math xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mnf="http://cambridge.org/core/manifest" xmlns:cup="http://contentservices.cambridge.org" xmlns:mml…
A new nanocomposite material containing approximately 50 vol % S is prepared by filling pores of bulk nanoporous carbon samples with sulfur. The initial nanoporous carbon samples are synthesized from polycrystalline α-SiC through the chemical reaction. A comparative investigation of small-angle x-ray scattering (SAXS)…
Two hydrogen and two Si-related defect centers were detected and characterized by electron spin resonance (ESR) in diamond films grown by chemical vapor deposition. Observation of hyperfine structure, combined with illumination and polishing treatments, suggests that the KUL2 and KUL9 ESR centers originate from two ch…
Highly mono-sized dye-doped liquid crystal (LC) microcapsules were prepared by the solute codiffusion method for application in photoswitchable devices. Azobenzene derivatives, which can be photoisomerized by irradiation with UV (366 nm) and visible (433 nm) light, were used as a photoresponsive dichroic dye. The micr…
A closed system incorporating FTIR continuous monitoring and GC-MS sampling has been developed to study the generation under UVA illumination of volatile photodegradation products from model plasticised and TiO2 pigmented films. The presence of the plasticiser dibutyl adipate (DBA), at levels of 0-88 phr, has been sho…
Nanosize ferroelectric powders of Pb(Zr,Ti)O/sub 3/ (PZT) have been successfully synthesized by pulsed wire discharge. This has been achieved by the evaporation of Pb, Zr, and Ti wires simultaneously. Since these metals have considerable difference at the boiling point, instant heating by using pulsed-power technology…
Abstract A sample of cobalt oxide with cobalt ions in a highly oxidative state, p‐Co 2 O 3 , was prepared from Co(NO 3 ) 2 (aq) through a precipitation by NaOH and an oxidation by H 2 O 2 . The prepared p‐Co 2 O 3 was characterized as a nonstoichiometric sample with a chemical formula of Co 3+ 0.96 Co 4+ 0.04 O 2− 1.5…
We report a detailed investigation of binary mixtures composed of members of the homologous series of (S)-4′-(2-n-alkoxypropanoyloxy)biphenyl-4-yl 4-n-alkoxy- f-cyanocinnamates. The phase transition curves for these mixtures have no minima. On the contrary, eutectic behaviour was obtained if the members of this homolo…
Abstract Oligophenylazomethines (OPAs) and the aniline‐capped OPAs (OPA's) as soluble model compounds of polyphenylazomethine (PPA) were synthesized via dehydration of 4‐aminobenzophenone in the presence of TiCl 4 or PTS as a Lewis acid. The 1 H‐NMR spectra of OPAs revealed that OPAs have some isomers, which are based…
Recently, we have introduced a method based on geometric considerations, termed geometric direct minimization (GDM), to achieve robust convergence of self consistent field calculations. GDM was limited to calculations involving either spin-unrestricted orbitals or closed shell systems. We report the extension of the G…
The temperature dependences of the thermal conductivity of layered crystals (LCs) of graphite, boron nitride, gallium sulfide, etc., are analyzed. It is shown that the bending branch of vibrations typical of LCs determines the behavior of the thermal conductivity only in the region of its increase. The decrease in the…
Scanning force microscopy (SFM) has been used to probe the local polarization state and piezoelectric properties of ferroelectric films. The conductive SFM tip was employed as a movable top electrode to detect the piezoresponse in the film induced by an ac voltage. Our measurements reveal a spatial dependence of the p…
The processing route of grain oriented electrical sheet was simulated by laboratory trials. Besides MnS, the effect of AIN and NbC as an inhibitor phase in 3 % silicon steel was also investigated. In the hot strip material the niobium microalloyed steel showed the highest volume fraction of the {110}<001> Goss t…
The electronic structures of undoped c ‐ and t ‐ZrO 2 were calculated by a first‐principles molecular orbital method. A preliminary analysis revealed that experimental energy‐loss near‐edge structure profiles obtained in ZrO 2 –8 mol% Y 2 O 3 could be satisfactorily explained from the present theoretical calculation.…