Materials Literature
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Microstructural evolution of silicon nitride (Si 3 N 4 ) and SiAlON materials and its influence on creep resistance is reviewed. Grain size, grain morphology, and the ratio of α‐ to β‐phase grains play a part in resistance to creep. The glassy, intergranular phase typically has the strongest influence on creep. Creep…
First-principles calculations based on density functional theory are performed to study structural and electronic properties of crystalline bundles of (n,0) zigzag and (0,n) armchair-type single-walled boron nanotubes (SWBNT) with small diameter, about 4-6. The results predict a modification in the properties of SWBNT…
Abstract The real‐time measurement of the morphology of immiscible polymer blends based on polypropylene (PP) and polyamide 6 (PA6) was performed during melt blending in a twin‐screw extruder. The disperse phase particle size and concentration were obtained in‐line with an optical device placed at the die exit. To val…
Abstract We have made a study of the development of phase morphology of an immiscible blend(75/25)(polypropylene–polyamide‐6) for different types of continuous mixers including (i) Buss Kneader, (ii and iii) modular intermeshing corotating and counter‐rotating twin screw extruders, and (iv) NEX‐T Kobelco Continuous Mi…
The domain structure and phase symmetry of the (1−x)Pb(Mg1∕3Nb2∕3)O3–xPbTiO3 piezoelectric crystals with a composition close to the morphotropic phase boundary (MPB) between the rhombohedral R3m and monoclinic Pm phases (x≅0.3) have been studied by polarized light microscopy. It is found that poling by an electric fie…
A quantum-cutting (QC) phosphor K2GdF5:Eu3+ shows poor optical absorption and a theoretical quantum efficiency (QE) of 107% in the ultraviolet (UV) and vacuum ultraviolet (VUV) excitation spectral ranges. Pr3+ was codoped as a sensitizer in K2GdF5:Eu3+, thus increasing the absorption in the UV and VUV spectral regions…
The coupling effects of rotational and translational Brownian motion in anisotropic macromolecules result in differentiated diffusion constants parallel and perpendicular to the particle’s long axis in the short term. Investigations of these dynamics allow for a greater understanding of how directional alignment can b…
BACKGROUND: We have developed magnetite cationic liposomes (MCLs) and applied them as a mediator of local hyperthermia. MCLs can generate heat under an alternating magnetic field (AMF). In this study, the in vivo effect of hyperthermia mediated by MCLs was examined using 7,12-dimethylbenz(a)anthracene (DMBA)-induced r…
With the ongoing miniaturization of structures and devices down to the nanometer scale, we notice concomitant escalation of atoms located at surfaces or interfaces. Presence of surfaces and interfaces generates stresses in nanoscale structures that can easily exceed 1GPa. We developed and applied a method for measurin…
Abstract Doped polyaniline in its emeraldine salt form (PANI‐ES) were successfully prepared by in situ chemical oxidative polymerization using various concentrations of sodium dodecyl sulfate (SDS) micellar solutions. Structural analysis using field‐emission scanning electron microscopy and high‐resolution transmissio…
Time‐dependent, two‐dimensional, electrothermal simulations based on random Voronoi networks have been developed to study the internal heating, current distributions and breakdown effects in ZnO varistors in response to high‐voltage pulsing. The simulations allow for dynamic predictions of internal failures and to tra…
Li/Ta‐codoped lead‐free (Na,K)NbO 3 ceramics with a nominal composition of [(Na 0.535 K 0.480 ) 0.942 Li 0.058 ](Nb 0.90 Ta 0.10 )O 3 were synthesized normally at 1070°–1100°C. The XRD patterns of all samples show a single pervoskite structure with tetragonal symmetry. Although MPB separating the orthorhombic and tetr…
Abstract Master batches with four different kinds of functionalized multiwall carbon nanotubes (MWCTs) were prepared through the mixing of MWCTs with poly(ethylene terephthalate) (PET) (0.01 : 0.99 w/w) in trifluoroacetic acid/dichloromethane mixed solvents (0.7 : 0.3 v/v) followed by the removal of the solvents in th…
Electrical transport properties of heteroepitaxial p-n junctions made of La0.8Sr0.2CoO3 and SrTi0.99Nb0.01O3 were studied. Junctions display highly rectifying current-voltage characteristics over a wide temperature range (20–300K). Two distinct transport mechanisms are identified: tunneling assisted by interface state…
The present work reported the effect of addition of ZrO 2 on the microstructure and mechanical properties of ZrB 2 ‐based ceramic composites by means of hot‐pressed sintering. Observation of microstructure and systematic testing results of mechanical properties were carried out. Through X‐ray diffraction analysis and…
Soft x-ray resonant powder diffraction has been performed at the Mn ${L}_{2,3}$ edges of A-site-ordered ${\mathrm{SmBaMn}}_{2}{\mathrm{O}}_{6}$. The energy and polarization dependences of the (1/4 1/4 0) reflection provide direct evidence for a $({x}^{2}\ensuremath{-}{z}^{2})∕({y}^{2}\ensuremath{-}{z}^{2})$-type orbit…
The grain boundary groove shapes for equilibrated solid aminomethylpropanediol, 2-amino-2 methyl-1.3 propanediol (AMPD) with its melt were directly observed by using a horizontal temperature gradient stage. From the observed grain boundary groove shapes, the Gibbs–Thomson coefficient (Γ), solid–liquid interfacial ener…
Near-infrared-ultraviolet optical properties of BaCoxTi1−xO3 (BCT) (x from 1.0% to 10%) films have been investigated by the transmittance spectra. The dispersion functions in the photon energy range of 1.24–6.2eV have been extracted by fitting the experimental data with Adachi’s model. It was found that the oscillator…
Dendritic hydrosilated network with exceptional thermo-oxidative stability containing POSS and carborane nanoclusters was synthesized from octasilane-POSS (1) and vinyl-terminated carboranylenesiloxane (2). A variant of the product, containing additional structurally reinforcing SiOSi bonds, was formed by the conc…
Abstract Plasma‐activated biaxially oriented polypropylene (BOPP) films and paper substrate have been coated with functional chitosan solutions. Plasma treatment increased the amount of surface peroxide groups and carboxyl groups on the BOPP films. As a result of plasma activation, the surface energy increased from 30…