Materials Literature
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In the late 1980s Dyakonov theoretically demonstrated the existence of lossless surface waves at the interface between two different transparent dielectrics, provided that one of them was anisotropic. These (also coined as) dyakonons have low-efficiency coupling rates in natural birefringent materials and all-dielectr…
In situ FTIR testing demonstrated that crystallization of novel poly(1-butene)/poly(propylene- co -butene) in-reactor alloys from melt shows thermodynamic stable Form I directly rather than general reported unstable crystal Form II. In order to make clear this phenomenon, the microstructure and monomer sequence distri…
The volume deformation test, differential scanning calorimetry and chemical titration technique were used to experimentally research the interventions of retarders on the free autogenous volume deformation of cement paste doped with CaO expansion clinker at different ages systematically, as well as the hydration rate…
The phonon dispersion in a ZnS crystal has been studied by the density functional theory method with different pseudopotentials containing 10 (Zn 12+ ) and 18 (Zn 20+ ) semicore electrons of the shell with the principal quantum number n = 3 in a zinc atom. It has been found that the pseudopotential of Zn 20+ , unlike…
The stress-strain state of an implant of a porous titanium nickelide was studied in its placement instead of damaged bone tissue. A value of open porosity of a titanium nickelide sample was determined by the data obtained in processing of SEM images as well as by the liquid saturation method. The applicability of the…
The technique of plasma polymerization was used in the preparation of the poly (cyanate ester) thin films using 4-methoxyphenol cyanate ester (MPCE), 4-Cumylphenol cyanate ester (CPCE) and 4-phenylphenol cyanate ester (PPCE) as precursors. Different from the conventional thermal polymerization of cyanate ester monomer…
The oxidation behavior of Fe-15Cu-10Al alloy was investigated at 700°C. Oxidation kinetics of the alloy conformed nearly to the parabolic rate law. The scales were composed mainly of alumina, plus a few nodules rich in iron. The very low oxidation rate of Fe-15Cu-10Al alloy showed that 10at.% Al level reached the crit…
In this report, we present new type of optic designs inspired by the various animal species for advanced optoelectronic devices. Camera-type eyes that can be found in mammalian provide the idea for hemispherical cameras, where Petzval-matched curvature in the image sensor can dramatically simplify lens design without…
With the solvent of ethylene glycol, it is synthetized the bismuth tungstate(BWO) catalyst with controllable morphology. By using X ray powder diffraction(XRD) and the scanning electron microscope(SEM and TEM), the products are characterized. It is found that glycerol content can affect the morphology and structure of…
The first sample of triethanolamine-functionalized hexamolybdoarsenate [(HOCH2CH2)3NH]n(H3O)n[{Mn(H2O)2}0.5Mn(H2O)3{HN(CH2CH2O)3AsVMo6O22}]n·3.25nH2O (1) has been synthesized in aqueous solution and characterized by elemental analysis, IR spectroscopy, thermal gravimetric analysis, and single-crystal X-ray diffraction…
In this paper, a cylindrical piezoelectric quasi-travelling wave motor, which used only a single vibrator to generate bidirectional rotations by changing the driving signal frequencies, was presented. The stator of the proposed motor consists of a metal tube and one piece of piezo-plate bonded onto the tube. Because o…
Considered small oscillations geometrically nonlinear shallow shell of revolution relative to the initial deformed state. Isotropic material model is considered. Problem is solved by mixed finite element method. Results of solution of test task are represented.
This study focuses on the mechanical effect of different composition of polymer blend. Polymer blend of high density polyethylene (HDPE) and ethylene propylene rubber (EPR) were selected and varied by three different compositions which are 70:30, 50:50 and 30:70. HDPE-EPR blend is believed to be the best material for…
In this work time-resolved photoluminescence spectra (PL-TRS) under pulsed excitation of fresh porous silicon (PSi) and with thin copper phthalocyanine (CuPc) deposited on the top of such structure are presented. The PSi substrate have been by electrochemical etching method produced. The CuPc coating have been using p…
Yb3+, Tm3+ co-doped Gd6MoO12 phosphors were prepared by the hydrothermal method. After tuning the PH value and EDTA, phosphors present different morphologies including hexagonal prisms, spindles, and spheres. Under 980nm excitation, the upconversion luminescence properties of the as-prepared phosphors are studied base…
Gram scale multi-layer graphene grown on polycrystalline SiC microspheres were prepared by continuously preparation method in argon through chemical vapor deposition process using liquid polysilacarbosilane as raw material. The observation of products obtained at different temperature confirmed the growth is temperatu…
The reactor pressure vessel is an unchangeable component of the light water reactor. To some extent, the life of the pressure vessel depends on the fast neutron fluence. In addition, the fast neutron fluence is an important parameter for radiation protection. So, the fast neutron fluence is one of the main parameters…
Thermal fatigue damage of high temperature titanium alloys and thermal fatigue crack growth (TFCG) behaviours are of great concern for severe temperature fluctuating environments. Cyclic thermal fatigue tests of heating to 700°C for 55 s followed by water cooling for 3 s at 20°C per cycle were performed with laser dep…
We demonstrate one-dimensional dielectric micro cavity embedded with a monolayer of molybdenum disulfide. Enhanced directionality in light emission due to the interaction of micro cavity photons with the two-dimensional excitons is observed.
Sr1-xGdxCo2Fe16O27-δ, (x = 0.05–0.20) was prepared via the proteic sol-gel process. Single-phase W-type hexaferrite doped with gadolinium was synthesized. The ferrite shows ferrimagnetic behavior with high saturation magnetization, low coercive field, low remnant magnetization, and a resistivity greater than 107 Ω·cm.…