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semiconductor-processing technologies, and the carbon-nanotube fabrication process can be widely applied for the development of electronic devices using carbon-nanotube field emitters as cold cathodes and can revolutionize the area of field-emitting electronic devices. The site-selective growth of CNT from an iron oxide nanoparticle catalyst patterned were also achieved by drying-mediated self-assembly......
into fibrous preforms were numerically calculated by the finite difference method, and the effects of squeeze infiltration parameters on infiltration velocity and temperature field were discussed...入口区域存在温度基本不变的高温区, 该区域温度与金属初始加热温度相近, 而在浸渗区域前沿很小的范围内, 温度急剧降低. 从图5浸渗区域中温度梯度曲线也可以明显看出这种温度分布的特点. 图4 外加压力对浸渗区域中温度分布的影响 Fig.4 Influences of applied pressure on temperature field (a) -5 MPa; (b......
of the electric-thermal field was obtained by the finite element analysis software. The results show that under the given process condition, the anode-cathode distance can drop to 2.75 cm, the cell system voltage....极距能降至如此之低,其根本原因还是导流槽的阴极上不贮存铝液,消除了铝液波动,保证了电解槽工作的稳定性.这也正是导流槽的优越性所在. 图2 导流槽热场图 Fig.2 Temperature field distribution in cell 表3 导流槽主要参数计算结果 Table 3 Main results of drained cell......
atmosphere.The micros tructure,mechanical and corrosion properties of the multilayer films were investigated by X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM),X-ray photoelectron......
Effect of Cerium on Microstructure and Electrochemical Performance of Ti-V-Cr-Ni Electrode Alloy乔玉卿,赵敏寿,朱新坚,曹广义摘 要:Effect of cerium on the microstructure and electrochemical performance of the Ti0.25V0.35-xCexCr0.1Ni0.3(x=0,0.005)electrode alloy was investigated by X-ray diffraction(XRD),field emission scanning electron microscopy/energy dispersive X......
between matrix and strengthening phase might lead to the formation of the coexisted field of crack deflection,branching and bridge linking.The mechanism of this phenomenon was that the addition of Y2O3......
in the appearance of diffraction peaks, characteristic for Nd2Fe14B tetragonal structure, α-Fe and Nd2O3 phases. The investigation using the Vibrating Sample Magnetometer (VSM) with a maximum applied field......
by the magnetic field and the doped Ce was used to enhance the photocatalytic activity of MTiO2. The morphological, struc-tural and optical properties of the prepared samples were characterized......
), Fourier transform infrared spectroscopy(FTIR), field emission scanning electron microscopy for obtaining the structural information about the prepared materials. Diffuse reflectance(DR) UV-Vis......
. In addition, the observed particle size reduction of chemically activated Zn Fe2O4 in field emission scanning electron microscopy(FESEM) micrographs was in agreement with the specific surface area......