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are 1∶1 and 1∶1.5 (Figs.4(a) and (b)), whereas if ratios are 1∶3 and 1∶3.5 (Figs.4(e) and (f)) gray nano-crystalline alumina powders are yielded. Only the ratio is 1∶2 or 1∶2.5 (Figs.4(c) and (d)), white foamy nano-crystalline alumina powders can be obtained. Fig.4 shows the XRD pattern of the prepared alumina powders. Because of the relatively smaller particle size, 1∶2 is the preferred molar ratio......
, B4C, Al2O3, AlN, Si3N4, TiC, TiO2, TiB2 and graphite have been reinforced into it. On the other hand, nano-crystalline matrices strengthened by nano-sized reinforcement are expected to have much better microstructural stabilities and performance than nano-crystalline materials [3] due to the occurrence of strengthening by grain boundary and nanoparticle reinforcements [4-6]. High energy ball......
of ZnO film observed from the nano-crystalline material surface obtained from electro-deposition method, for example, a mirror-like surface was observed from the electroplating nano-crystalline... substrates[J]. Appl Phys Lett, 2001, 79(7): 943-945. [16]Czerwinski F, Szpunar J A. Structural and magnetic characterization of nano-crystalline Ni-20%Fe permalloy films[J]. Journal of Materials Science......
to D and G bands, were significantly broadened. And an extra broad band near 1140 cm-1 appeared, which indicates the presence of nano-crystalline [9-12]. Broadening of the diamond band was the result of the nano-grain size, Raman scattering in the region of 1400-1600 cm-1 was attributed to sp2-bonded carbon existing between the nano-crystalline diamond [13]. It is noted that the spectra had an extra......
. 1 XRD pattern of Ag@CoS/rGO nano-crystalline electrode material The presence of Ag in Ag@CoS/rGO is confirmed with the appearance of a strong diffraction peak at 2θ=36.51° as reported in JCPDS... in the sample, respectively [43,44]. Fig. 2 FTIR spectrum of Ag@CoS/rGO nano-crystalline electrode material 3.3 Surface morphology To study the surface morphology of the nanocomposite material SEM was examined......
): 135-139. WANG Er-de, HU Lian-xi. Research progress in Nano-crystalline materials by mechanical alloying [J]. Powder Metallurgy Technology, 2002, 20(2): 135-139. [12] CAO Peng, LI Lu, MAN On LAI...-lian, WANG Deng-long, HUANG Bai-yun, et al. Optimzation on mechanical alloying process of 90W-7Ni-3Fe nano-crystalline composite powder[J]. The Chinese Journal of Nonferrous Metals, 2004, 14(1): 6-12......
in Li1-xNi0.5Mn1.5O4 spinel [J]. Electrochim Acta, 2002, 47(11): 1829-1835. [10]Myung S T, Komaba S, Kumagai N, et al. Nano-crystalline LiNi0.5Mn1.5O4 synthesized by emulsion drying method [J]. Electrochim Acta, 2002, 47(15): 2543-2549. [11]Lee Y S, Sun Y K, Ota S, et al. Preparation and characterization of nano-crystalline LiNi0.5Mn1.5O4 for 5V cathode material by composite carbonate process [J......
synthesized nano-crystalline InVO4 powders by hydrothermal approach. However, there were two disadvantages: firstly, the agglomeration of InVO4 nanoparticles was obvious; secondly, the organic additives.... [13] XIAO G C, LI D Z, FU X Z, WANG X X, LIU P. Synthesis for single dispersing nano-crystalline InVO4(orthorhombic) at low temperature [J]. Chinese J Inorg Chem, 2004, 20 (2): 195-198. [14] CHEN L M......
technology, the pulse electro-deposition, as a simple, highly active and low cost deposition method, had been used to deposit nano-crystalline films [1-3]. With respect to the deposition of nano-crystalline...] ADELKHANI H, GHAEMI M. Nano-structural tailoring of manganese dioxide by using pulse current electrodeposition [J]. Solid State Ionics, 2008, 179(39): 2278-2283. [3] QU N S, ZHU D, CHAN K C, LEI W N......
peaks disappear probably due to the existence of both nano-crystalline[15-16] and amorphous regions, as seen in the case of the drawn 0.30 mm diameter wire (shown in Fig.13). In order to obtain some... in ferrite phase, in addition to the formation of amorphous regions and fine nano-crystalline cementite phases as shown in Figs.14 and 15. Especially, it is attractive that lamellar structure can be readily......
