Materials Literature
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Observations of the phase front and the domains during the paraelectric-ferroelectric ${\mathrm{KD}}_{2}{\mathrm{PO}}_{4}$ phase have been performed in very good thermal homogeneity conditions (thermal gradient equal to $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}{\mathrm{K}\mathrm{}\mathrm{mm}}^{\mathrm…
The isotropic–nematic transition of the tobacco mosaic virus (TMV) particles by polysaccharide is related to a high inhibitory activity against TMV infection. We study the process of the isotropic–nematic transition of the TMV particles as a function of the polysaccharide concentration by Monte Carlo simulations in th…
Electrical machines depend on ferromagnetic materials to handle useful power within a practicable compass. Flux magnification and control lies at the heart of machine efficiency. Reduction of thickness, perfection of purity and improved grain texture are some of the ways forward. Streamlined standardised loss measurin…
An investigation of dielectric relaxation at relatively low-temperature (55--225 K) of the protonic conductor ${\mathrm{Ba}}_{1\ensuremath{-}x}{\mathrm{Nd}}_{x}{\mathrm{CeO}}_{3},$ for $x=0.05,$ has revealed a major dielectric relaxation peak, as well as an associated smaller peak, with characteristics that strongly s…
The phase transition sequence of natural gypsum (CaSO4 · 2H2O) was studied by Raman spectroscopy in the temperature range 300–550 K. The reduced peak intensity of the symmetric stretching mode around 1008 cm−1 varied anomalously during the gypsum–bassanite transition. From the spectral variations of this mode in the t…
We present a novel application of the maximum entropy (MaxEnt) method for solving the double-inverse problems of removing instrument broadening from X-ray diffraction profiles and calculating the column-length distribution of the crystallites. The MaxEnt approach is shown to have compelling advantages over the convent…
Ammonia temperature-programmed desorption (NH3-TPD) was used to study the acidities of CeO2 and Ce0.5Zr0.5O2 solid solutions. The NH3-TPD peaks of both CeO2 and Ce0.5Zr0.5O2 exist at 100–850 °C. The ratio of the lower and middle temperature peak areas to the higher temperature peak is decreased for Ce0.5Zr0.5O2 relati…
Thermally (TL) and optically stimulated luminescence (OSL) were studied in AlN-Y2O3 ceramics after irradiation with ionising radiation. The extremely high TL sensitivity (approximately 60 times the sensitivity of LiF:Mg,Tl (TLD-100)) makes AlN-Y2O3 ceramics attractive as a TLD material. However, an essential drawback…
The pseudodielectric-function spectra, ε(E)=ε1(E)+iε2(E), of amorphous (a-) selenium (Se) in the 1.2–5.2 eV photon-energy range at room temperature were measured by spectroscopic ellipsometry. The a-Se films investigated were deposited by vacuum evaporation in a base pressure of 2×10−6 Torr on Si(100) substrates at ro…
Natural thermoluminescence as well as gamma and beta induced thermoluminescence were studied in a set of micas with the general formula (K, Na) Xn AlSi3O10(OH,F)2, where X corresponds to Al3+, Mn2+, Mn3+, Fe2+, Fe3+, Mg2+, Ti4+ or Li+, depending on the mica type. These minerals are classified according to crystallogra…
In this article, the syntheses and thermal properties of several alkyne- and phosphorus-containing materials are discussed. The materials were synthesized using substituted phenolic molecules which were added to phosphorus oxychloride. The materials synthesized include phosphine oxides, phosphates, diphosphates, and o…
Article Biodegradable Composite Materials Based on Polyethylene and Natural Polymers. I. Mechanical and Thermal Properties was published on August 1, 1999 in the journal Journal of Polymer Engineering (volume 19, issue 5).
In the present work, some thermoluminescent properties of chemically vapour deposited (CVD) polycrystalline diamond films are investigated. After radiation, two TL peaks at least located at 350 and 540 K are observed. After depletion of the low temperature peaks, the 540 K TL peak is isolated and then analysed by diff…
A model is developed for determining the stress and strain fields of an array of slip dislocation defects in a two-dimensional elastic medium with a highly nonlinear and nonlocal energy functional. The medium serves as a model for an elastic system in the vicinity of a martensitic structural phase transformation, in t…
Abstract The synthesis of polymer monolayers, which are designed to act as “cushions” for lipid membranes attached to solid surfaces, is described. Monolayers of poly(ethyloxazolines) which could act as a polymeric support for biomimetic membranes have been attached to silicon oxide or gold surfaces following differen…
Parametric analyses of the strain-stress in the drying process are performed to study the influence of the intermittent drying on the behaviors of drying-induced strain-stress and deformation as well as the drying characteristic. The transient three-dimensional problem of strain-stress and heat and moisture transfer i…
4-Chloro-1,3-phenylene bis[4-(4-n-alkylphenyliminomethyl)benzoates] have been synthesized and the mesophases were investigated by optical microscopy, X-ray diffraction measurements and electrooptical methods. Some derivatives exhibit the electrooptically switchable mesophase B2 between 75–125°C, which can be supercool…
Abstract Fresh and weathered pyrochlore from the Lueshe carbonatite complex (in the northeast of the Democratic Republic of Congo) was studied by Fourier transfom infrared (FTIR) spectroscopy and by a combination of FTIR spectroscopy and thermal analysis. The former was carried out in the spectral range 400–4000 cm −1…
A new 13% Cr martensitic stainless steel (0.025% C-13% Cr-Ni-Mo) with excellent resistance to carbon dioxide (CO2) corrosion and good resistance to sulfide stress cracking (SSC) was developed, and its application limits in oil and gas environments were clarified. The CO2 corrosion rate of the 13% Cr steels with Ni and…
Amylose-iodine (AI) complex has been synthesized in aqueous solution without added KI. Complex formation (with solid iodine in amylose solution) is maximized at approximately 35°C and decreases beyond that temperature. Ion-selective electrode (ISE) measurements of an aqueous solution of iodine and AI complex indicate…