Effect of oxygen gas on the decomposition of dye by pulsed discharge in water droplet spray

The influence of stresses on the magnetic properties of nonoriented electrical steels was studied. The dependence of iron loss on compressive stress was affected by grain size. The magnetic polarization J in strong magnetic fields such as 5000 and 10,000 A/m increased due to compressive stresses and decreased due to tensile stresses in samples with low Si content. Using Kerr‐effect domain observation, it was found that the reduction in J caused by tensile stresses was attributable to residual striped domains. Magnetostriction measurements in strong magnetic fields indicated that the increase in J under compressive stresses originated from the Villari effect (inverse magnetostrictive effect) due to negative magnetostriction in low‐Si materials. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 182(4): 10–18, 2013; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.22320     

三维非连续变形分析(3D DDA)理论及其在岩石边坡失稳数值仿真中的应用

在3D DDA中，分析的块体是由岩体内部实际存在的不连续面切割而成。在计算过程中，利用块体的几何关系正确地寻找出可能产生接触碰撞的块体，并在块体接触时利用接触弹簧来评估接触面法线方向的接触力：另外，在剪切方向则遵守摩尔-库仑破坏准则，最后以独创的开合迭代方法来保证每一计算步长具有较准确的接触力和解算的收敛性。计算的结果与位于日本天鸟桥西的现场监测影像进行对照后发现，此新计算法可以高精度地预测岩体失稳过程。—     

Electrical conductivity and related properties of molten carbonates coexisting with ceria-based oxide powder for hybrid electrolyte

The electrical, thermal and structural properties of composite electrolyte containing Ce_0.9Gd_0.1O_1.95 (GDC) powder and (Li_0.52Na_0.48)₂CO₃ eutectics are investigated by AC impedance, differential thermal analysis and polarized Raman scattering spectroscopy. The system shows a dependence of the electrical conductivity upon the temperature. The transition point varies with the apparent average thickness of the liquid phase, while the activation energy, ΔE_a, remains constant at any distance from the solid phase. Higher electrical conductivity was obtained for the GDC/(Li_0.52Na_0.48)₂CO₃ composite than that for α-Al₂O₃/(Li_0.52Na_0.48)₂CO₃. Even in the N₂ or Air gas flow, the weight loss caused by decomposition of CO₃²⁻ ion based on Lux–Flood equilibrium was rarely observed. The symmetric stretching mode of the polarized Raman spectra shows that carbonate ion maintains its D_3h symmetry in the presence of ceria. A constant value of the depolarization ratio of the ν₁(A′₁) mode with regard to the apparent average thickness confirms that the symmetry of carbonate ions in the molten state is not altered by the presence of ceria powder. It was more stable than that for the system containing α-Al₂O₃ as a reference sample. These findings contribute to the understanding of the properties of ceria-based carbonate electrolyte for intermediate temperature solid oxide fuel cells.