Materials Literature
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Internal nanodomains in the form of stripe or nanostripe domains (NSDs) have been found in high permittivity CaCu3Ti4O12 (CCTO) prepared by ceramic route. High resolution transmission electron microscopy study detects plane defects along the domain boundaries. Electron diffraction patterns indicate the existence of pr…
In the 1920s, Hume-Rothery helped to make the art of metallurgy into a science by the discovery of rules for the prediction of solubility in alloys. Their simplicity and generality made them become one of the most important rules in materials science. In the few decades after Hume-Rothery’s discovery, many researchers…
Based on the transverse Ising model in the framework of the mean field approximation, this paper discusses a ferroelectric bilayer film with the surface transition layers within each constituent slab and an antiferroelectric interfacial coupling between two slabs. The hysteresis loop of a bilayer film is investigated.…
Pure and Eu-doped CdS nanobelts are synthesized by a thermal evaporation method. For the undoped CdS reference nanobelt, it only exhibits the emission related to free-excitons, very close to the energy of exciton absorption band, and moreover, the excitation power dependent photoluminescence (PL) data show a superline…
The absorption correction for cylindrical specimens, typically capillary or annular, is affected by absorption in both the specimen and the supporting material. These corrections are calculated here using numerical integration of the lengths through the different regions of the specimen that the beam traverses. Suitab…
Ba(0.6)Sr(0.4)TiO(3)-Mg(2)SiO(4)-MgO composite ceramics were prepared by a solid-state reaction method and their dielectric tunable characteristics were investigated for the potential application as microwave tunable materials. The addition of Mg(2)SiO(4)-MgO into Ba(0.6)Sr(0.4)TiO(3) forms ferroelectric (Ba(0.6)Sr(0.…
The visible emission and vacuum ultraviolet excitation spectra of the series Cs2NaLnCl6 (Ln = Y, Nd, Sm, Eu, Tb, Er, Yb) and Cs2NaYCl6:Ln3+ (Ln = Sm, Er) have been recorded using synchrotron radiation at room temperature, and in some cases at 10 K. The excitation spectra comprise features associated with charge transf…
The authors have studied the influence of Si–O bonding in the polymer structure of Si-containing resists on O2 plasma etch behavior. Three polymers were synthesized with the same Si wt % (12.1%) and varying number of Si–O bonds (0, 1, or 2). The etch resistance during the plasma process was measured by monitoring the…
The influence of biaxial elastic tension-compression and tension-tension deformation on the coercive force and remanent magnetization of Cτ3 steel and 09Γ2C pipe steel cross-shaped specimens is studied. It is shown that coercive force grows monotonically with increasing load in the direction of compression under elast…
This paper presents both experimental and modeling investigations of a catalytic wall fuel processor consisting of coupled methane reforming and methane combustion sections. The reacting systems are both catalytic and the latter generates the heat required for the occurrence of the former. The catalytic wall reactor w…
We have studied anisotropy of thin layers of amphiphilic tetrathiafulvalene derivatives (TTF-4SCn, with n=12, 18, and 22) obtained by zone-casting technique. All the films show optical anisotropy, as seen by polarized optical microscopy and polarized UV-visible spectroscopy. By using polarized Raman spectroscopy an an…
This study were investigate the adhesion and bonding characteristics of bamboo (Gigantochloa scortechinii) strips and laminates treated with permethrin-based preservative (Light Organic Solvent-Based (LOSP) and Water-Based (WBP)) formulations, Tributyl Tin Oxide (TBTO) and borax. The bomboo culm were cut into strips a…
Abstract First principles molecular dynamics simulations of ternary phosphate‐based glasses P 2 O 5 CaONa 2 O (PBGs) have been carried out in order to provide an accurate description of the local structure and properties of these important materials for biomedical applications. The structures of PBGs with compositio…
The normal state of the iron chalcogenide superconductors shows a range of inexplicable features. Both bad metallic resistivity, characteristic pseudogap features and proximity to insulating states mark these systems as correlated non-Fermi liquid metals. Here, using the LDA+DMFT scheme with sizable multi-orbital corr…
With continuing scaling of Cu-based metallization, the electromigration (EM) failure risk has remained one of the most important reliability concerns for advanced process technologies. The main factors requiring attention are the activation energy related to the dominating diffusion mechanism, the current exponent as…
The formation mechanism of the varistor effect in composites based on polar (polyvinylidene fluoride) and nonpolar (polyethylene, polypropylene) polymers and semiconductors (silicon and germanium) is studied. It is shown that the varistor effect in polymer-semiconductor composites is caused by carrier tunneling transp…
Silicon nitride ceramics containing calcium aluminates as sintering aids have been prepared by hot pressing at 1650°C in a nitrogen atmosphere, and the effect of sintering aid content on their microstructure, phase composition, mechanical strength, and air oxidation resistance has been studied. The results demonstrate…
(2010). AUTEX 2009 – World Textile Conference. Materials Technology: Vol. 25, No. 2, pp. 68-68.
In order to further understand the pulsed-laser melting (PLM) of Mn and N implanted GaAs, which we have used to synthesize thin films of the ferromagnetic semiconductor Ga1−xMnxAs and the highly mismatched alloy GaNxAs1−x, we have simulated PLM of amorphous (a-) and crystalline (c-) GaAs. We present a numerical soluti…
The synthesis, spectroscopic and electrochemical properties of new phthalocyanines bearing four morpholine and four chloro units is reported. Two-step synthesis involved efficient nucleophilic substitution of 4,5-dichlorophthalonitrile as the key step. The free-base phthalocyanine and its several complexes have been c…