Advanced Materials Research Vol. 1096

Abstract: The adsorption performance of commercial activated carbon (AC) for formaldehyde at room temperature was investigated. The BET surface area of AC is 805 m²/g, and the average pore diameter of AC was found to be 2.9 nm by the nitrogen adsorption method. The result of the adsorption capacity of AC showed that the removal ratio of formaldehyde was obviously increased with adsorption time in the first 5 hours and then was almost unchanged. The highest removal ratio of formaldehyde by AC is ~92%. The cycle test of the formaldehyde removal by AC indicated that the highest removal ratio of formaldehyde declined slightly with cycles and kept unchanged after 4 cycles. The lowest removal ratio of formaldehyde by commercial AC at room temperature still reached 80%.

Abstract: For the present situation of spotty mask fabrics in current market, the paper used natural fiber silk as raw materials for the study of anti-fog and haze mask fabrics. The paper design five different programs and any one sample in every program has different weft density or warp and weft yarn fabric specifications. Make total of 15 kinds of trial samples and do a series of testing of fabric performance. Through testing the pore size value, the filtration efficiency, resistance value and other indicators and analyzing the results, do research on filtering properties of the fabrics. The conclusions have certain guiding significance in product development.

Abstract: In recent years, large amounts of wastewater are mostly discharged directly to environment without being properly treatment in many washing industry, bringing tremendous damage to the environment. From the perspective of reducing energy consumption of washing waste water treatment, the first washing wastewater containing the highest pollutant concentration are tested properly, the second and third washing wastewater could be recycled. In this research, the treatment effects of six coagulants are tested, the appropriate coagulant and an economic treatment scheme of first washing wastewater are developed according to the characteristics of wastewater. Adopting the method of centralized treatment, by which we can reduce water consumption and carbon emissions and can be used in the small and medium-sized enterprise of washing industry.

Abstract: For the purpose of obtaining the characteristic parameters of the asphalt mixture aggregate particles, a viable method using two-dimensional image was put forward in this paper. The automatic detection system of asphalt mixture aggregate characteristic parameters is developed based on VC++. A series of processing are done on the collected aggregate images, including image edge detection, image segmentation, morphological processing, region-labeling, contouring and so on .The region-labeling algorithm is improved ending with low complexity, high robustness. Database technology is used to deal with the storage, query of the results and several other operations. The whole system is characterized with perfect function, user-friendly interface and stable performance, which provides a practical and accurate method for the characteristic detection of asphalt mixture aggregate particles.

Abstract: This work was performed on 3C-SiC layers grown on 4H-SiC substrates by chemical vapour deposition after a surface pre-treatment using GeH₄ gas. By means of TEM, the effects of different GeH₄ fluxes in the 3C layer quality has been studied and compared. An optimal GeH₄ flux permits to drastically reduce twin boundaries but another type of defect occurs and has been widely studied in this paper.

Abstract: In chemical processing plants and petroleum refineries, the pressure vessels and pipelines suffered often from fire accidents and thus resulted in the metal materials were in overheating state. Elevated temperature could cause the changes in metallographic structure and have unfavorable effects on material mechanical properties. In order to understand better the influence laws of overheating on metallographic structures and material mechanical properties, the methods of theoretical analysis and experimental research were used and the effects of thermal exposure temperature, duration time and cooling rate on microstructure of low-alloy steel 12MnNiVR, were studied systematically. The study can provide basis data for the material properties database of metal material suffered from fire accident, and afford technical supports in the key technologies on fire damage FFS (Fitness-For-Service) integrity assessment.

Abstract: A hybrid plasmonic waveguide system consisting of a high-permittivity cylinder waveguide embedded in a low-permittivity dielectric deposited on a metal substrate is comprehensive investigated. With the strong coupling between dielectric cylindrical waveguide mode and the long-range surface plasmon polaritons (LRSPP) mode of a thin metal film, the basic waveguiding properties, including the effective mode area, the propagation length, the mode character, and the figure of merit (FoM) can be achieved. Our results may provide valuable references for waveguiding metal -supported dielectric nanowires for practical applications. An investigation of the effect of structural perturbations indicates that the disturbance of the dielectric nanowires of our proposed waveguide with different surrounding dielectric layer would have a great influence on the experiment results.

Abstract: The law of influenced material of liner is researched by numerical simulation.Multiple explosively formed projectiles (MEFP) forming process is numerically simulated with different liner material,such as copper, aluminum, iron and so on.The law that the formation parameters of MEFP such as velocity, length-diameter ratio and radial dispersion angle,influenced by the density and ductility of liner material is educed.It reaches the conclusion that the velocity and radial dispersion angle of projectiles decreases 58% and 56% with the increasing density of the liner material; the length-diameter ratio of central projectile increases276%with the increasing ductility of the liner material, so in order to acquire good formation of MEFP parameters, the appropriate density and higher ductility should be chosen.

Abstract: Amorphous silicon films with and without spin-coating aluminum-salt-solution are treated by 193nm ArF excimer laser with different laser energies. It is observed that the crystalline fraction increases along with the laser energy. By comparation, with the help of Al, higher crystalline volume fraction and lower in-plane stress can be achieved at the same laser energy (2.9mJ). Large grain size of 200~300nm and maximum crystalline fraction of 82.3% are obtained in Al-salt-solution spin-coated sample, which is treated with laser energy of 3.2mJ,and its carrier mobility is 56.3cm²/Vs.