Materials Literature
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Nanoscaled Zn2SiO4:Mn2+ green phosphor was synthesized through the hydrothermal method using Zn(CH3COO)2, Mn(CH3COO)2, and (C2H5O)4Si as starting materials. According to the XRD results, the pure hexagonal structured zinc silicate nanophosphor could be synthesized at a low temperature of 140 degrees C. The TEM image s…
The fabrication of the periodic ordered structures with complex shapes or heterostructures are important for many potential applications. In this paper, zinc oxide two-dimensional (2D) nanomesh and three-dimensional (3D) inverse opal complex connected structures were fabricated by the electrochemical deposition method…
The thermal conductivities of the LaPO4/Al2O3 composites that were fabricated by spark plasma sintering (SPS) were determined. The results revealed that their thermal conductivities displayed nearly a slow decrease with increasing temperature from 25oC to 800oC, having the classic 1/T dependence. In addition, the cond…
This work studies the precipitation of secondary phases in beryllium at 600, 560, and 500°C. Cast and hot-pressed beryllium alloys with iron content of 0.09°-0.8 wt % were studied. Mössbauer spectra of samples annealed over a total of more than 500 h were obtained. Precipitation processes were studied on the basis of…
A model of a crystal with a strong electron-phonon interaction that initiates a second-order phase transition has been considered. The purpose of the study is to determine the temperature dependence of the thermodynamic potential of the symmetric phase in the temperature range in the immediate vicinity of the transiti…
Zn1-xCuxO films were prepared by radio frequency (RF) magnetron sputtering method. The wurtzite ZnO crystal can be well retained up to a Cu composition of 10% and doped Cu ions substituted into Zn sites of ZnO host lattice. All the samples show high transparency over the wavelengths from 400 to 1000 nm. The room tempe…
Using molecular dynamics method, the progress of bonding single-wall carbon nanotubes and metal electrodes by ultrasonic nanowelding technique is described completely at atomistic length scales. The temperature distribution in electrodes is analyzed. The maximal temperature of electrode atoms is about 570.1K. The mech…
The structural and energetic characteristics of ThF (4−)+ (n = 1–8) complexes have been calculated by the ab initio RHF and MP2 methods.
We have investigated the defects observed in the multimode waveguide fabricated on the flexible copper clad laminate using vacuum lamination of film-type raw material, UV exposure and development processes. The excess loss caused by the defects was estimated using the simulation method and the estimated values were fo…
W-doped DLC films were synthesized from CH4 and W by ion beam deposition and magnetron sputtering, and the influence of W target current on the surface morphology and the mechanical properties of W-doped DLC films deposited were studied. The W-doped DLC films in the study have a smooth dense surface with several parti…
We report defect reduction in 50-nm-thick laser-crystallized polycrystalline silicon (poly-Si) films by a combination of hydrogen plasma at 100 W for 5 s at room temperature with 4.7×105 Pa H2O vapor heat treatment at 150 °C for 6 h. The present treatment increased the photoconductivity to 1×10-3 S/cm for undoped poly…
Thermal deformation process of H62 brass is studied, multi-scale simulations of macro-forming property and microstructure distribution are carried out for the hot-extrusion process of double cups part with flange utilizing numerical simulation technology, the process parameters are determined and the microstructure of…
A procedure for the automatic photometric determination of phosphate ions in natural waters was developed, based on the formation of a colored ion associate of the reduced form of phosphomolybdic heteropoly anion with a polymethine dye, Astra Phloxine. The detection limit was 5 μg P/L at the sample volume of 0.3 mL.
Porous ZrO2 single crystals were prepared through a sol-gel-hydrothermal method and characterized by XRD, HR-TEM, SEM and FT-IR. The results show that the dried sol gel was converted into monoclinic zirconia crystals after calcined above 550 °C. The zirconia single crystal has a porous structure with the crystal sizes…
Researches on bending property of the AZ31B magnesium alloy sheet have been focusing on the loading methods and their own performance, while the temperature is less concerned in the past. In this paper, the law of the springback with the temperature changing was especially studied. In addition, the forming characteris…
Constant stress tensile creep tests were conducted on an AZ 91–25 vol.% aluminum silicate short fiber composite and on an unreinforced AZ 91 matrix alloy. The creep resistance of the composite is shown to be considerably improved compared with the matrix alloy, and the resistance effect is better with the increase of…
The influence of uniaxial deformation on the transport properties of bismuth wires is studied in a wide range of temperatures. Measurements of the resistance of bismuth nanowires with several diameters and different quality reveal oscillations in the strain dependence of the resistance for uniaxial strain at T=4.2K. T…
The thermo-physical properties of sulfosalt SnSb 2 S 4 thin films deposited at two different glass substrate temperatures by Thermal Evaporation were investigated using the Photothermal Deflection method in its uniform heating case instead of traditionally a non uniform heating one. The advantage of applying this meth…
A method is described, which will be used as a basis for designing a system for monitoring the parameters of a stripping target in neutral particle analyzers being developed for neutral particle diagnostics of the ITER plasma. This method is based on examining the target by a beam of alkali ions and measuring the ener…
Methyl tert-butyl ether(MTBE) is widely used as gasoline additive. Surface waters in China were polluted by MTBE with different degrees. MTBE was found to be one of the most resistant towards molecular ozone attack and difficult to be degraded by microbe. In this study, experiments were carried out to investigate the…