Materials Literature
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Complex permeability spectra μ*=μ′−iμ″ for two types of spinel ferrites (Ni–Zn ferrite and Mn–Zn ferrite) and their composite materials have been investigated. The contribution of domain-wall and natural resonance to the permeability spectra was estimated by the numerical fitting of actual measurement data to a simple…
An overview of the definition and development of, factors that contribute to, applications and markets for and the design of high performance/high temperature polymers is presented. Of the many families of high performance/high temperature polymers known, the most popular families consisting of polyimides, polyarylene…
This paper reports on the swelling and exfoliation behavior of a layered protonic manganese oxide, H(0.13)MnO(2).0.7H(2)O, in a solution of tetrabutylammonium (TBA) hydroxide and the formation and characterizations of unilamellar two-dimensional crystallites of MnO(2). At low doses of TBA ions, layered manganese oxide…
ABSTRACT: In response to the dynamic changes in current consumer demand and market trends, the area of Active Packaging (AP) is becoming increasingly significant. Principal AP systems include those that involve oxygen scavenging, moisture absorption and control, carbon dioxide and ethanol generation, and antimicrobial…
A model based on Rayleigh–Gans–Debye light‐scattering theory has been developed to describe the light transmission properties of fine‐grained, fully dense, polycrystalline ceramics consisting of birefringent crystals. This model extends light transmission models based on geometrical optics, which are valid only for co…
We present a theory of the Fano resonance for optical resonators, based on a temporal coupled-mode formalism. This theory is applicable to the general scheme of a single optical resonance coupled with multiple input and output ports. We show that the coupling constants in such a theory are strongly constrained by ener…
1. Motion and Deformation.- 2. Stress.- 3. Constitutive Axioms.- 4. Nonlocal Electromagnetic Theory.- 5. Constitutive Equations of Memory-Dependent Nonlocal Electromagnetic Elastic Solids.- 6. Nonlocal Linear Elasticity.- 7. Nonlocal Fluid Dynamics.- 8. Nonlocal Linear Electromagnetic Theory.- 9. Memory-Dependent Nonl…
A new rewritable and initialization-free AgO x -type super-resolution structure was proposed and studied. Results show better reflectivity and carrier-to-noise ratio than the previously reported structure.
Anticorrosion performance of various amino-terminated aniline oligomers cured with epoxy resin as coatings on cold-rolled steel has been investigated systematically using two industrial standard tests, i.e., salt spray (ASTM B117-97) and cyclic UV-salt fog exposures (ASTM D5894-96). Data are evaluated based on the sta…
Blue emission was observed from thin films of barium chloride hydrate doped with cerium. The films were deposited by spray pyrolysis of aqueous solutions with substrate temperatures between 250 and 450 °C. The cathodoluminescence (CL) spectrum consists of two peaks at 443 and 485 nm due to 4f-5d transitions of cerium…
Thin Al films of varying thickness, i.e. 3 to 30 nm, were deposited onto polyethylene-terephthalate film by evaporation in the vacuum of 3 Ă 10-3 Pa. The dependence of DC (direct current) surface resistance on thickness was measured using a four-point method. The surface resistance exhibits the size effect in accorda…
It is difficult to optimize the write strategy by conventional methods in high-density recording systems with very severe intersymbol interference. We have proposed a new method using the index accounting for the linearity of the channel, which is very important in the partial-response-maximum-likelihood detection sch…
The two-step polymerization method, including polycondensation and chain linking reactions, was conducted to obtain high-molecular-weight lactic acid polymers. The biodegradability of these polymers was subsequently investigated. Three polymerization routes were studied. Hydroxyl-terminated prepolymers were linked wit…
Bi3ScMo2O12, tribismuth(III) scandium molybdate(VI), has a framework structure derived from that of scheelite. It is nearly isotypic with Bi3FeMo2O12; while in the latter the FeIII atom is tetrahedrally coordinated by O atoms, the Sc atom in the title compound has a distorted octahedral coordination, and is substitute…
The orientation dynamics of a lyotropic colloidal suspension of sepiolite clay under extensional flow have been explored by combined dichroism and small angle light scattering measurements. Extensional flow was applied using a four-roll mill to a thin film of sepiolite suspension (rigid rods 1 μm long and 0.010 μm in…
The ground-state director configurations in a grating-aligned, zenithally bistable nematic device are calculated in two dimensions using a Q tensor approach. The director profiles generated are well described by a one-dimensional variation of the director across the width of the device, with the distorted region near…
After an introduction into the basic principles of corrosionprotection with the Organic Metal Polyaniline, the method of assessing corrosion protection efficiency quantitatively will be described. It will be shown that polyaniline coatings are powerful anti-corrosion coatings, out-performing conventional coatings. The…
Abstract The composition of polyester polyols derived from terephthalic acid (TPA) and diethylene glycol (DEG) was examined. The synthesis of individual oligomers 1 , n is described. The compounds were characterized with 1 H and 13 C NMR, mass spectrometry, and elemental analyses. The resonance signals arising from ar…
We have examined the early stages of surfactant dissolution and mesophase formation using a dimer-solvent model with phase behaviour representative of surfactant-water systems. We use an orientational order parameter to characterize systematically the appearance of mesophases. We find the process is diffusion controll…
We present x-ray diffraction, x-ray photoemission spectroscopy, magnetization, and transport results on the cerium-doped manganite ${\mathrm{La}}_{0.47}{\mathrm{Ce}}_{0.20}{\mathrm{Ca}}_{0.33}{\mathrm{MnO}}_{3}.$ We have achieved good quality, single-phase polycrystalline samples by the nitrate decomposition route. A…