Advanced Materials Research Vols. 476-478

Abstract: Finite element equations are introduced when the wet deformation is considered under Coupled Deformation and Seepage Fields. The principle of the initial stress increment method, by which the wet deformation can be calculated, is detailed dealt with. One earth-rock dam is stimulated by finite element method during water storage. By applying nonlinearity elastic model, give the discussions on the impact on stress field and displacement field by the wet deformation. The results show that the wet deformation weakens the uplift by buoyancy. Those results gained by numerical method may provide reference to engineering practice.

Abstract: Bat-like ZnO nanorods were prepared by evaporation of Zn powders without any catalyst. The length of nanorods ranged from several micrometers to tens of micrometers. Growth mechanism of the nanorods was discussed combining field emission scanning electron microscopy and high-resolution transmission electron microscopy results. The photoluminescence spectrum was measured by using a He-Cd laser as the excitation source (325 nm) and all the results indicated the product had perfect crystal quality.

Abstract: To fluorine gypsum block reinforced by wheat straw as the research object, the experiment studied the influence of the different proportion of early strength agent, composite inspire agent, wheat straw fiber on fluorine gypsum block reinforced by wheat straw, and ensured ratio of raw materials of fluorine gypsum block reinforced by wheat straw. The experiment synthetically analysised the basic property of fluorine gypsum block reinforced by wheat straw, and forecast its development prospects.

Abstract: Abstract. The structure, construction method, process theory, technical requirements and economic analysis of pasted dovetail board XPS board are described by taking the engineering case analysis as examples. Compared with the existing external wall insulation board, the technology is characterized by excellent insulation effect, less product auxiliary materials, easy recognition on the quality of auxiliary materials, simpler and more convenient construction, and construction period and cost-saving. The construction technology of the external wall external insulation of pasted dovetail groove XPS board is energy-conservation, eco-friendly and has remarkable efficiency. It can be widely promoted and used in the external wall external insulation project which requires energy-conservation.

Abstract: This paper emphasis has researched the ER properties of Ni group core-shell nano particles modifier with Urea，SDBS and other polar molecule，analysis the relationship among ER properties and polar molecule type ，compound modifier under different electric field or magnetic field. It is found that the shear stress increasing with adding polar molecule, compound polar molecule modify can marked advance the properties of Ni group core-shell particles ER fluid.

Abstract: The control of both stretching stress and elongation value are commonly used in the construction of tendon stretching. But when using the anti-rotation front-clamping jack, the elongation value of tendon is always overlong. This article combined with the construction of prestressed plate girder structure in QingHe River Bridge, taking actual measurement of the elongation value of prestressing and analysis of the reasons for tendon elongation value overlong in theory, putting forward the improvement measures, for relevant projects for reference.

Abstract: The new wall insulation materials of vitrified micro bubbles were made of vitrified micro bubbles, expanded perlite and decent additives by adding sodium silicate and cement as the bonders, and were manufactured through mould pressing process. In this paper, the process parameters of the production were made sure through orthogonal experiments, such as the ratio of raw materials and forming process, the performance of product was studied, and the mechanism of product was discussed.

Abstract: The suitability of some different kinds of liquid electrolytes with a 1M solution of LiCF3SO3 was evaluated for discharging capacity and cycle performance of Li/S cells at room temperature. The liquid electrolyte component was found to have a profound influence on the discharging capacity and cycle property. The lithium–sulfur battery based on the alcohol-ether binary electrolyte shows two discernible voltage plateaus at around 2.4 and 2.1 V, which correspond to the formation of soluble polysulfides and of solid reduction products, respectively. However, the liquid electrolyte based on carbonate electrolyte shows a bad compatibility with sulfur cathode. The lithium sulfur battery can not deliver acceptable discharging capacity and cycle performances.

Abstract: The task of this study is to prepare the TiO2 film electrode for dye-sensitized solar cells (DSSC) on ITO PET substrate using a general jet-printer. The results were compared with that obtained using ITO glass substrate. In this study, the dispersion of TiO2 slurry was manipulated by changing the pH value of the solution to avoid agglomeration of TiO2 particles. The average TiO2 particles used in this study were measured about 130nm. The experimental results show that it has the best performance when the thickness of the TiO2 film was about 10μm. In ITO glass substrate, the measured short circuit current was about 5.03mA, the open circuit voltage was measured to be 0.65V. In ITO-PET substrate, the measured short circuit current was about 2.73mA, the open circuit voltage was measured to be 0.68V.

Abstract: In order to improve the electrochemical cycle stability of the La–Mg–Ni system A₂B₇-type electrode alloys, the partial substitution of Zr for La has been performed. The La_0.75−xZr_xMg_0.25Ni_3.2Co_0.2Al0.1 (x = 0, 0.05, 0.1, 0.15, 0.2) electrode alloys were fabricated by casting and melt-spinning. The influences of both the substitution of Zr for La and the melt spinning on the structures and the electrochemical cycle stability of the alloys were investigated. The structure characterization of XRD, SEM and HRTEM reveals that the as-cast and spun alloys have a multiphase structure, composing of two main phases (La, Mg)₂ Ni₇ and LaNi₅ as well as a residual phase LaNi₂. The substitution of Zr for La results in an evident refinement of the grains of the alloys instead of changing the structures of two major phases. The electrochemical measurement indicates that both the substitution of Zr for La and the melt spinning remarkably ameliorate electrochemical cycle stability of the alloys. The capacity retaining rate (R100) of the as-spun (5 m/s) alloys at 100th charging/discharging cycle is enhanced from 67.43% to 79.22% by increasing Zr content from 0 to 0.2. And that of the Zr0.1 alloy is increased from 73.21% to 82.07% by growing spinning rate from 0 (as-cast was defined as the spinning rate of 0 m/s) to 20 m/s.