Materials Literature
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Two new yttrium silicates have been synthesized by a high-temperature flux-growth technique in air. The phase BaKYSi 2 O 7 is monoclinic, with space group P 2 1 / n , a 9.775(2), b 5.718(1), c 13.096(3) A, β 104.61(3)°, V 708.3(3) A 3 , and Z = 4; Cs 3 YSi 8 O 19 is orthorhombic, space group Pnma , with a 11.476(2), b…
Ceramic cores play an essential role in investment casting. In this paper, gelcasting process has been successfully employed to fabricate alumina based ceramic cores containing yttria for single crystal and directional solidification blades. Based on an investigation of the formability of different ceramic slurries, m…
Epithelial-mesenchymal interactions play an important role in regulating normal tissue development as well as tumor development for the mammary gland, but much is yet to uncover to reach a full understanding of their complexity. To address this issue, the establishment of relevant, surrogate, three-dimensional (3D) hu…
Transformation optics provides a promising way to guide waves in the open space. It is shown that a small waveguide coated with transformation medium will behave as a big virtual tunnel connecting two waveguide ports separated faraway. The waves are transmitted and guided smoothly in the open space through this 'invis…
A cavity perturbation resonance technique is used to determine the complex permittivity and permeability of iron-based composite absorbers prepared by mixing various weight percentages of carbonyl iron powder with epoxy as the matrix. The complex permittivity (ε′-jε″) and permeability (μ′-jμ″) are measured around X-ba…
The n -ZnO films doped with Ga to the content 2.5 at % are produced by pulse laser deposition onto the (0001) oriented single crystal sapphire substrates. The transmittance spectra of the ZnO films in the range from 200 to 3200 nm are studied in relation to the Ga dopant content. It is established that an increase in…
La0.61Li0.17TiO3 microstructures have been studied by high resolution electron microscopy. A local lattice distortion occurs in the vicinity of the domain boundary region due to the twin with an angle of 89°. The average domain size of La0.61Li0.17TiO3 is greater than 20 nm. The domain size and structures of La0.61Li0…
The formation of CoFe 2 O 4 nanocrystals under hydrothermal conditions at a temperature of 130°C is investigated. The average size of CoFe 2 O 4 particles varies from 6 to 11 nm depending on the synthesis time. The hydrothermal medium is heated by two different methods, i.e., the microwave (with a synthesis time from…
Near single phase ternary bulk thermoelectric material AgSbTe2 was synthesized by high pressure and high temperature (HPHT) method. The temperature-dependent thermoelectric properties including Seebeck coefficient, electrical conductivity, and thermal conductivity were studied. The HPHT synthesized AgSbTe2 sample has…
The article presents a review of phase equilibrium data for four-component systems involving ester synthesis and hydrolysis reactions (acid-alcohol-ester-water) systems. A brief characteristic of the experimental and calculated data is given.
We conduct athermal simulations of freely cooling, viscous soft spheres around the jamming transition density ${\ensuremath{\phi}}_{J}$ and find evidence for a growing length $\ensuremath{\xi}(t)$ that governs relaxation to mechanical equilibrium. $\ensuremath{\xi}(t)$ is manifest in both the velocity correlation func…
A review on surface modification of different polymers by treatment in oxygen plasma is presented. Plasma is created in a high frequency inductively coupled gaseous discharge at the power of about 200 W. In such discharge created in pure oxygen, plasma with the following parameters is obtained: the electron temperatur…
The present paper demonstrates how data mining techniques can be used to quantitatively assess multivariate material properties, such as electronic features and crystal structure parameters. Using AB 2 N 4 spinel nitrides as a template for the present study, the authors have assessed the statistical interdependency of…
The methods of group theory have been used to decompose the crystal structures of centrosymmetric perovskites, ABX 3 , that exhibit zone-boundary tilting of the BX 6 octahedra. For the fourteen space-groups consistent with these phenomena, the associated structures are decomposed in terms of the magnitudes of an appro…
A comparative analysis of the electron range in solids as a function of the initial electron energy (in the range 1–50 keV) and parameters of matter is performed. A relationship between the full length range of electrons and the depth of their penetration into the target material is established using simple empirical…
The structure, harmonic frequencies and vibrational mode assignments for 2-chlorobcnzoic acid (2CBA) monomer are calculated using HF and DFT methods employing the 6-311++G(d,p) basis sct. The results of the molecular structure and vibrational frequencies obtained on the basis of calculations are presented and critical…
The effect of starting powders on the sintering of nanostructured tetragonal zirconia was evaluated. Suspensions were prepared with a concentration of 10 vol.% by mixing a bicomponent mixture of commercial powders (97 mol.% monoclinic zirconia with 3 mol.% yttria) and by dispersing commercially available tetragonal zi…
An overview is presented of an approach for treating cancer that uses nanoparticles to deliver heat to diseased areas after absorbing energy from a laser of the appropriate wavelength. The implications are discussed of the relationship of parameters necessary to raise the temperature to therapeutically beneficial leve…
We describe a nanocrystal self-assembly method for the preparation of rare earth fluoride nanotube (ReF-NT) arrays and magnetite-doped rare earth fluoride nanotubes (Fe 3 O 4 -ReF-NTs) by using porous anodic aluminum oxide (AAO) as a hard template. The ReF-NTs can be simply prepared by the impregnation of α-NaYF 4 nan…
Abstract ‘Ghassoul’ clay is a Mg-rich clay from Morocco which is of great industrial use and interest, but its characterization is still incomplete. The purpose of this study was to provide further details regarding the structure and characteristics of this important commercial clay mineral. Mineralogical and physicoc…