Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
To study chemical behaviors of energetic deuterium implanted into boron coating deposited by boronization in fusion devices, two types of boron coating film deposited on silicon and IG-430U were prepared by Plasma Chemical Vapor Deposition (PCVD) technique. Boron polycrystal was used as the reference sample. The chemi…
Lyocell fibers, a generic subclass of rayon fibers, are produced from cellulose dissolved in N-methylmorpholine oxide (NMMO). The lyocell solutions typically consist of blends of cellulose from similar low and high degree of polymerization (DP) dissolving pulps to achieve desired spinnability and fiber properties. The…
The aim of this paper is to present a rigorous mathematical proof of the dynamical laws for the topological solitons(magnetic vortices) in ferromagnets and anti-ferromagnets. It is achieved through the conservation laws for the topological vorticity and the weak convergence methods.
We have studied effects of the partial substitution of La/sup 3+/ for A/sup 2+/ on the magnetic properties of double perovskites A/sub 2/FeMoO/sub 6/ (A=Ca and Ba). Polycrystalline A/sub 2-x/La/sub x/FeMoO/sub 6/ (0/spl les/x/spl les/0.3) samples have been prepared by the conventional solid-state reaction in a stream…
Two kinds of CVD diamond films were investigated with respect to their thermoluminescent (TL) properties, especially concerning their sensitivity to ionising radiation and to daylight. The films were characterised by means of Raman/photoluminescence/FTIR spectroscopy, XRD, RBS and elastic recoil detection analysis (ER…
Hexagonal polycrystalline boron nitride (BN) films are synthesized on Si substrates by plasma assisted chemical vapor deposition. In the case of the BN films thicker than 20 nm, the turn-on electric field of the electron emission is strongly influenced by the surface roughness rather than the film thickness. On the ot…
Abstract Thermal decomposition of several aliphatic tert -amyl (TA, 1,1-dimethylpropyl) peroxyesters, RC(O)OOTA, has been studied in dilute solution of n -heptane at pressures up to 2500bar and temperatures up to 195°C. The peroxides under investigation were: tert -amyl peroxyacetate (TAPA), tert -amyl peroxy- n -buta…
Abstract H 12 MgO 14 Rb 2 Se 2 , monoclinic, P 12 1 / a 1 (No. 14), a = 9.401(1) Å, b = 12.658(2) Å, c = 6.339(1) Å, β = 105.25(1)°, V = 727.8 Å 3 , Z = 2, R gt (F) = 0.020, wR ref (F 2 ) = 0.040, T = 293 K. CoH 12 O 14 Rb 2 Se2, monoclinic, P 12 1 / a 1 (No. 14), a = 9.363(1) Å, b = 12.618(1) Å, c = 6.3562(7) Å, β =…
This article is a short review of our work on forces in a liquid crystalline medium that has been carried out in recent years. Using an atomic force microscope (AFM), the force between the glass substrate and ≈10 µm glass sphere has been measured. In all experiments, the glass surfaces have been treated for a homeotro…
The effect of stresses, appearing due to a difference between the temperature coefficients of linear expansion of a substrate and ferroelectric film, on the self-polarization is discussed using thin films of lead zirconate-titanate PbZr x Ti 1− x O 3 (PZT) of different compositions as an example. It is assumed that th…
In this study, it was modified a tensile Hopkinson bar with which it can be carried out tests up to a predetermined strain. During dynamic test using a Hopkinson bar, the final strain reached by the specimen was controlled by a stopping elongation system; this system include a snap ring to attenuate the effects of the…
Abstract Aliphatic‐aromatic hyperbranched polyesters of reasonable degrees of branching ( DB 's) but of relatively low molar masses were prepared from 3,5‐bis(bromomethyl)benzoic acid ( 2a ). 2a was synthesized by radical bromination of 3,5‐dimethylbenzoic acid. The polymerization of 2a and that of the potassium salt…
Raman scattering, X-ray photoemission spectroscopy (XPS), Fourier transform photocurrent spectroscopy (FTPS), Rutherford backscattering (RBS) and electron paramagnetic resonance (EPR) method have been used for characterization of diamond layers deposited by microwave plasma enhanced chemical vapor deposition (MWPECVD)…
The polarization-dependent transmission of light through an electrically controllable in-line-type polarizer that is made from polymer-dispersed liquid-crystal spliced optical fibers is discussed experimentally and theoretically. This in-line-type optical splicing method has the advantage of low transmission loss when…
This study reports a hitherto undescribed endophytic diatom that forms dense unialgal colonies in the mucilage that fills the internodes of a red alga, Coelarthrum opuntia. The diatom is very similar to Gyrosigma tenuissimum, in that the valve outline is delicate and linear, although it has a central raphe with extern…
Ni-Zn(-Co) ferrite films of 0.5-0.6 /spl mu/m in thickness were deposited on glass substrates by the spin-sprayed ferrite plating at as low as 90/spl deg/C applying external magnetic field of 50 Oe. Under no bias field, while the film without Co substitution (Ni/sub 0.21/Zn/sub 0.27/Fe/sub 2.52/O/sub 4/) exhibited a r…
Abstract The hydrothermal reactivity of a Mg-vermiculite from Santa Olalla (Spain) was studied experimentally at 150 and 300ºC, 75 and 100 bars, respectively, in (Na,K,Ca,Mg) chloride and sulphate solutions (liquid/solid ratio = 10). The formation of mixed-layer clays is demonstrated by FT-IR spectroscopy, X-ray diffr…
The diffusion behavior of water through epoxy coatings with micaceous iron oxide (MIO) at different pigment volume concentration (PVC) was studied by EIS techniques. Experimental results showed that, in the initial diffusion period, the diffusion processes of water through epoxy coatings immersed in 0.5 M sodium chlor…
Prismatic shear and round notched tensile specimens with different geometries for variation of triaxiality were subjected to high strain rate loading in a Split-Hopkinson-Pressure-Bar device and in a high strain rate tensile machine, respectively. In finite element simulations with only a deformation model (Johnson-Co…
There is much speculation about the origin of fatigue in ferroelectric thin films that have been grown by sol-gel on various substrates. One of the most important substrates for growing thin film ferroelectric materials is native SiO2. After the deposition of suitable electrode, most common are Ti-Pt, a thin film of a…