Materials Literature
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Infrared absorption spectroscopy in the multiple internal reflection geometry and hybrid density-functional cluster calculation are used to characterize the adsorption structure of hydride species that form during adsorption of disilane on $\mathrm{Si}(100)(2\ifmmode\times\else\texttimes\fi{}1)$ at room temperature. W…
In the recently developed high-sensitive CaSO 4 : Dy phosphor, sieving before the high-temperature sintering treatment has successfully eliminated particle agglomeration during subsequent sintering, and has further enhanced its thermostimulated luminescence (TSL) sensitivity to γ-rays. The reduction in TSL sensitivity…
Experiments are presented of the response of pseudoelastic NiTi wires subjected to displacement controlled cycles. A custom-built thermo-mechanical testing apparatus is used to control the background temperature field of the wire specimen while allowing the evolution of transformation fronts to be tracked by full-fiel…
We report a quantitative analysis of the detailed equilibrium atomic structure of molten linear polyethylene, obtained using directed bridging Monte Carlo computer simulation techniques. The polydisperse sample has an average chain length of 6000 backbone carbon atoms, or approximately 84000 g mol −1 . This molecular…
The average electronic polarisability of the oxide ion (α O2- ), optical basicity (Λ), Yamashita-Kurosawa's interaction parameter (A) and oxygen Is (O1s) binding energy in x-ray photoelectron spectroscopy (XPS) of xBi 2 O 3 . (100-x)B 2 O 3 glasses (x=0∼65) have been examined to check correlations among them and to cl…
To improve the dimensional properties of wool fabric, two kinds of silicone polymers are applied to plasma pretreated wool. With this treatment, hygral expansion increases slightly but still remains smaller than that of silicone treated wool without the plasma pretreatment. The wrinkle recovery angles of wool increase…
Ti/TiSi2/TiC powder mixtures with molar ratios of 1:1:4 (M1) and 1:1:3 (M2) were first employed for the synthesis of Ti3SiC2 through pulse discharge sintering (PDS) technique in a temperature range of 1100–1325 °C. It was found that Ti3SiC2 phase began to form at the temperature above 1200 °C and its purity did not sh…
Interdependence of the configurational, vibrational, and anharmonic-force contributions to the entropy of a liquid during its supercooling is investigated, and the effect of the anharmonic-force contribution to the entropy at constant pressure and constant volume conditions is analyzed. For realistic values of the Grü…
Thermodynamics of the Na 1−x Li x NbO 3 system is investigated by high‐temperature drop‐solution calorimetry in molten 3Na 2 O–4MoO 3 solvent at 973 K. Standard molar enthalpies of formation are derived. The estimated heats of transition between hypothetical and stable structures, lithium niobate and perovskite for Na…
A microscopic model is developed for calculating electrostatic properties of nanotube devices. It is shown that the quantum-mechanical approach yields the same results as the statistical calculation in the limit of a thin tube suspended over a conducting gate at a distance exceeding the nanotube radius. A closed analy…
We present the results of molecular dynamics computer simulations of a simple glass former close to an interface between the liquid and the frozen amorphous phase of the same material. By investigating F s (q, z, t), the incoherent intermediate scattering function for particles that have a distance z from the wall, we…
The induction period of urea in methanol has been measured experimentally by the visual observation method. The induction period, which is inversely proportional to the nucleation rate, has been used to estimate the interfacial tension between the urea crystal and the methanol solution and hence the nucleation paramet…
Abstract The oxygen (O2) absorption kinetics of six commercial O2 scavengers were studied. The scavengers were placed in bags which were filled with 240 mL of air, 4.5 L N2 + 15 mL of air, or 3.5 L CO2 + 9 mL of air. The O2 concentration in each bag was measured at hourly intervals for 8 h. The effects of variability…
High quality piezoelectric single crystals, such as Pb(Zn(1/3)Nb(2/3))O3-PbTiO3 (PZNT) and Pb(Mg(1/3)Nb(2/3))O3-PbTiO3 (PMNT), have been investigated, and, because their piezoelectric properties are greatly superior to those of Pb(Zr(1-x)Ti(x))O3 (PZT) ceramics, they have been used for certain transducer applications…
Abstract The morphologies of films blown from a low‐density polyethylene (LDPE), a linear low‐density polyethylene (LLDPE), and their blend have been characterized and compared using transmission electron microscopy, small‐angle X‐ray scattering, infrared dichroism, and thermal shrinkage techniques. The blending has a…
Abstract This paper reviews selected phenomena related to the boundary friction process. The central thrust is on triboemission, defined as emission of electrons, charged particles, photons, etc., under conditions of boundary friction and/or surface damage caused by fracture processes. Low‐energy electrons are one of…
N-channel ferroelectric dynamic random access memory (FEDRAM) FETs with SrBi2Ta2O/sub 9//SiN/Si structure were fabricated and characterized. The estimated switching time (t/sub sw/) of the fabricated FET, measured at applied electric field of 376 kV/cm, was less than 50 ns, which could be significantly reduced upon sc…
Platinum nanoparticles were prepared in water-in-oil microemulsions and deposited on γ-alumina using two different methods. In the first method, the alumina support was added to the particle suspension and the microemulsion was subsequently destabilized by addition of tetrahydrofurane, whereby the particles were depos…
Stress development during the constrained sintering of a sandwich structure of alumina/glass/alumina has been studied. Stress distribution in the glass layer was calculated using a finite element method. The shear stress exhibited a maximum at the edge of the alumina/glass interface. The in‐plane tensile stress, forme…
Abstract Poly(butylene succinate‐ co ‐butylene 2‐methyl succinate) (PBSMS) random copolymers were synthesized with various comonomer compositions and their crystallization behaviour and morphology were investigated by differential scanning calorimeter, small angle X‐ray scattering and polarized optical microscopy. The…