Advanced Materials Research Vols. 503-504

Abstract: In accordance with the requirements of the reference materials technical specifications, refer to some countries’ existing standards of chemical composition of copper and copper products, design the chemical composition of each re-calibration samples. Using proper methods of batching, smelting technique and extrusion processes etc., developed a set of re-calibration samples of copper and copper alloy. These samples are mainly used for standardization of photoelectric direct reading spectrometer instrument, to meet the re-calibration of various elements of Cu, Pb, Fe, Ni, Bi, Sb, P, As, Al, Zn, Mn, Si, Sn, Cr, Cd, Zr, Mg, S, C, Ag, Co, Se, Te in the copper, brass, bronze, copper-nickel and other copper alloy. Determine the content of the various elements using a variety of methods, these samples can also act as control samples for the control analysis of the relevant elements separately. In comparison with existing international re-calibration samples, the series of samples have advantages of small quantity, wide coverage, more reasonable distribution of elements.

Abstract: The influence of surface properties, including fineness, total pore volume, specific surface area and zeta potential on viscosity of TiO2 slurry were studied. The viscosity and these surface properties of TiO2 samples were respectively measured by viscometer, standard sieve, specific surface area analyzer, particle size analyzer. The results show that with increase of fineness and absolute value of zeta potential, the viscosity of TiO2 slurry decrease gradually, but with increase of total pore volume and specific surface area, the viscosity of TiO2 slurry also increase. The suitable conditions in low viscosity of TiO2 slurry are as follows: fineness and absolute value of zeta potential is respectively greater than 0.1%, 70mV; total pore volume and specific surface area is respectively less than 0.05cc/g, 7.5m2/g

Abstract: The main work of this paper is the test of morphological structure and Infrared spectrum of Germanium fiber , strength、humidity content、fineness uniformity、humidity content and resistance to acids and bases of Germanium yarns, to prove that the special properties of the Germanium fiber yarn suitable for the production of health next-to-skin apparel. Aimed at providing the relative theoretical guidance and preparation of personal clothing and fabrics when to use the Germanium fiber blended yarn for producing the next-to-skin apparel in the textile sector .

Abstract: via completely after heat-treatment, [111] orientation of single crystal alloy structure is still cubic  phase at way coherency are ordered in matrix g panel and the direction rules arrangement; In high temperature and tensile stress creep period, with stress axes ordered  has formed certain Angle raft shape organization, creep later in nearly fracture zone, raft shape  ordered caring and distortion in happen, with strain increases, coarsening and distorted aggravating, until the present wavy shape; During the creep [111] orientation of single crystal alloys deformation characteristics is a wrong in  matrix channel to sports and shear raft shape  phase, due to form larger, more variable dislocation cut ordered after raft shape , occurred in dislocation bunch of sets and its formation and crystal structure; Among them, the matrix channel to inherit the maximum shear dislocation slip is made of alloy with larger strain rate main reason.

Abstract: The importance of the coefficient of friction test in sheet metal forming field is introduced. Metallic sheet and strip testing method for coefficient of friction is described, the experimental principle of the testing method is introduced. Three important factors, which will obviously effects the test results, including testing mould, specimen width and surface lubrication conditions have been carefully studied. The comparatively stable testing technologies have been developed to guide the test.

Abstract: Using alumina-rich MgAl2O4 spinel AR78 and 97 fused magnesite as raw materials, brine as the binder, magnesia alumina spinel bricks close to theoretical composition have been prepared. The phase composition and microstructure of the specimens were analyzed and characterized. The alkali resistance property of specimens was researched using static crucible method. The erosion mechanism of alkali vapor to specimens was studied by XRD, SEM and EDS. The results show that: (1) The alkali resistance property of MgAl2O4 spinel bricks were improved obviously when the addition of magnesite is more than 7%. (2) The alkali resistance property of MgAl2O4 spinel bricks is the best when the addition of magnesite is 10.3%.

Abstract: This article first introduces the properties and tempering principle of outlast air-conditioning fiber. Then a series of tests, including morphological structure, infrared spectral analysis, fineness, single fiber strength and yarn strength, fineness uniformity, absorbency, moisture content, yarn hairiness, and acid and alkali resistance, has been respectively done to study the basic performances of the fiber and yarn, and the results of test were analyzed and evaluated systematically.

Abstract: Objective: To establish a common method to detect the content of chitosan oligosaccharide. Methods: Chitosan oligosaccharide was hydrolyzed completely by concentrated hydrochloric acid, and the solution was regulated into neutral with NaOH. Then, determined the absorbance in 525nm, and substituted into the regression equation to determine the results. Results: The results showed there was a good linear relationship when the concentration of chitosan oligosaccharide ranged from 0.02 mg/mL to 0.12 mg/mL, r2 = 0.999. The average recovery of chitosan oligosaccharide samples was 99.25%. Conclusion: The method is sensitive, accurate and simple. It is applied to determine of the content of chitosan oligosaccharide.

Abstract: The self-cleaning technology for solar cell array can promote efficiency of electricity produced and protect the solar cell. In this paper, a method of dusts-removal based on travelling-wave dielectrophoretic force was proposed. The theory of travelling-wave dielectrophoresis and the adhesion model between the dusts and the surface of the solar cell array were analyzed. According to the theory and the fabricating process of the film, the structure of the self-cleaning film for large solar cell array was designed.

Abstract: A new method to produce powder metallurgy (P/M) 316L stainless steel matrix composite by pressureless infiltrating Cu-10Sn alloy was studied. The effect of various compaction pressures and infiltrating temperatures on the microstructure, mechanical properties and corrosion resistance was investigated. The results show that high density P/M 316L stainless steel matrix composite could be achieved by infiltration. A maximum relative density of 98% was achieved, provided that the porosity of the skeleton was controlled at 18%~22%. After infiltration, hardness of the samples increased from 49 HRB to 89 HRB. Moreover, the critical corrosion potential reached -212 mV, close to the level of as cast 316L stainless steel. The hardness of infiltrated composite of the same density decreased with increase in initial skeleton density. It was necessary to prevent the egregious grain growth while the infiltrating temperature was too high.