Materials Literature
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We present the structural, magnetic and electrical properties of some manganese oxides such as Ln0.5M0.5MnO3 (Ln = La, Pr and M = Ca, Sr, Ba) in which the average ionic radius <rA> of the A site cation is varied while keeping the Mn3+/Mn4+ ratio fixed to 1. All the studied samples have a perovskite structure with rhom…
Mathematical grey interrelation analysis method was used to study the correlation of alloy elements and low steel corrosion in the splash zone. Eighteen kinds of low alloy steels were selected for 350-day experiments in a large marine corrosion environment simulating apparatus. The analysis results showed that the cor…
The orientational transition process of p-pentyl-p'-cyano-biphenyl (5CB) liquid crystal monolayers at the air-water surface during monolayer compression and the cis-trans photoisomerization process of surface azobenzene monolayer were examined using the Maxwell displacement current measurement. Using this measurement,…
The electron paramagnetic resonance (EPR) and dielectric properties of Pb5Ge3O11 crystals activated by copper ion are investigated. It is shown that Cu2+ ions replace Pb2+ in trigonal symmetry positions and occupy three off-center positions displaced from a crystal lattice site in a plane perpendicular to the polar ax…
Rheological properties (melt flow index and melt stability), mechanical properties (tensile strength, flexural strength and impact) of polyamide (PA6) polypropylene (PP) blends were investigated. Influence of potential compatibilizors: 4,4′-diphenyhnethane carbodiimide (OCDI), 4,4′-diphenylmethane bismaleimide (BMI) a…
This paper describes in detail a new concept of producing super light weight (0.24-0.26 g/cm 3 ) polyurethane (PU) midsoles to compete with EVA for sports shoes. Materials for the midsole of the dual density sport shoes are composed of PU or EVA. Though PU midsole has good cushioning (resilience), adhesive and process…
Abstract Transmission electron diffraction patterns from ultra-thin aromatic and aliphatic organic films at beam energies of 200 eV–1 keV have been recorded in a custom low energy electron transmission (LEET) chamber. A significant reduction of the molecular damage cross-section, measured by fading of diffraction spot…
The effect of processing on the mechanical properties of Sigma 1140+ SiC fibres was studied through tensile tests carried out on pristine Sigma 1140+ SiC fibres and on fibres extracted from a Ti-6A1-4V-matrix composite. The elastic modulus and the tensile strength were computed after measuring carefully the fibre diam…
The authors present a new static hysteresis model for magnetic materials based on physical meaning. The idea is original: electronic transformation of the material is compared to a chemical reaction. Then a simple analytic formulation of the B(H) law for GO iron sheet in the rolling direction is obtained. Results are…
The design of a transformer should consider the analysis of the load variation. This paper describes the current wave calculation when the load condition varies for the newly proposed two-dimensional model in previous work, which can reflect the three-dimensional effects such as air gap and overlapped stacking. The an…
Fluorine-doped CdO thin films were deposited by spray pyrolysis from a solution of cadmium acetate in distilled water and methanol. The films were doped by addition of NH4F to the starting solution. The transmittance spectra corresponding to samples deposited with different concentrations of NH4F and different deposit…
Abstract Two reduced‐scale closed oil cycles are used to investigate the influence of both the cathodic protection of a pipeline and its proximity to AC power transmission lines on the oil‐flow electrification (OFE). For the former case, the results reveal that the OFE is highly dependent on the magnitude of the prote…
Structural and magnetic properties of the two-layered Ruddlesden–Popper phase SrO(La1−xSrxMnO3)2 with x=0.3–0.5 are highlighted. Intrinsic properties of these naturally layered manganites include a “colossal” magnetoresistance, a composition-dependent magnetic anisotropy, and almost no remanence. Above the Curie tempe…
Operation of any semiconductor device can be presented by unique configuration of the electrical field (potential) and charge (doping) distribution within the device. More specifically, the status of operation is described by the quasi-Fermi energy (QFE) profile across the device. Visualization of the dynamic operatio…
The phase behavior of LiKSO4 single crystals was studied by several techniques: ac calorimetry, differential scanning calorimetry (DSC) and impedance spectroscopy. Our results show distinct phase transitions at 38, 57, 206 and 718 K on cooling run. In the vicinity of 57 K new anomalous changes both in the specific hea…
Characterization of the Inlet Combustion Air,” National Inst. of Standards and Technology,NISTIR 6370, Gaithersburg, MD, July 1999. 7“American National Standard for Expressing Uncertainty—U.S. Guide for the Expression of Uncertainty in Measurement,” National Conf. of Standards Lab., American National Standards Inst./N…
The formation of vacancy-type defects in La-doped lead zirconate titanate (PLZT) thin films (Zr/Ti=20/80) was studied as a function of lanthanum doping and after cooling in an oxygen-reduced ambient. The changes in the Doppler-broadening S parameter are consistent with the progressive introduction of Pb-vacancies upon…
The drive towards dry vacuum pumping has occurred across the spectrum of vacuum applications from semiconductor manufacture to industrial processing. This brings with it a need to systematically evaluate and quantify the degree of cleanliness characteristic of any particular pump; currently, there is no universally ac…
Thermal degradation of polyvinyl chloride (PVC) and the effect of dichlorotin dioxine (DCTD) on this process have been investigated using dehydrochlorination (DHCl) and thermogravimetric techniques. A significant decrease in the rate of degradation was observed when PVC was mixed with a small amount which was maximum…
The reactions between NO and CO adsorbed on Rh(100) were studied with temperature programmed reaction spectrometry and static secondary ion mass spectrometry and compared with similar reactions on Rh(111). Elementary steps in the overall reactions, such as dissociation of NO, and reaction between CO and O atoms were s…