Papers by Keyword: Electric Pulse

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Authors: Rui Dong, Qun Wang, Li Dong Chen, Xiao Min Li
Abstract: A simple chemical solution deposition method was developed for the preparation of La0.7Ca0.3MnO3 (LCMO) thin films. The LCMO thin films were prepared on Si/SiO2/TiO2/Pt substrates by spin-coating method, followed by heat-treatment at 900°C. The fabrication process of the LCMO thin film was investigated by means of TG-DSC, FTIR, XRD, FE-SEM and EPMA. The electric pulse induced reversible resistance switching is observed in the Ag-LCMO-Pt sandwich structure.
Authors: Wei Sun, Jing Song Wang, Li Jun Cao, Hao Yan Sun, Jing Hua Wang, Qing Guo Xue
Abstract: The effect of different electric pulse parameters which include capacitance, voltage, frequency and treating time on the hot galvanizing coatings was studied through orthogonal test of array L25. For each factor, five levels were chosen to cover the experimental region. Results showed that the thicknesses of ally layer with different parameter were all reduced. It is from 63.57μm to 28.49μm. The intuition analysis of orthogonal test derived that the pulse capacitance had the most significant influence on the growth of alloy layer, and the influence of other factors was little. The optimum parameter combination were the capacitance of 200μF , the voltage of 700V, the pulse frequency of 4 Hz, and the treating time of 30 s.
Authors: Qun Wang, Rui Dong, Li Dong Chen, Tong Lai Chen, Xiao Min Li
Abstract: A novel electric-pulse-induced reversible resistance (EPIR) change effect was observed in Ag/Ln1-xCaxMnO3/Pt (Ln= Pr, La) sandwich structure at room temperature without applied magnetic field. The Ln1-xCaxMnO3 films were grown on Pt/Ti/SiO2/Si substrate. The resistance of the Ag/Ln1-xCaxMnO3/Pt sandwich structure increases and reaches at a saturated high resistance state after applying a certain number of electric-pulse from Pt bottom electrode to Ln1-xCaxMnO3 layer, while it decreases and switches to a saturated low resistance state when the pulse polarity reversed. It is also found that the EPIR effect in the /Ln0.7Ca0.3MnO3/Pt system exhibits “fatigue” behavior, that is, for the high resistance state activated by electric-pulse, along the time after pulsing, the resistance decreases slowly after a certain stable stage; otherwise, the resistance change ratio decreases as the number of the high-low resistance switching circle increases. For the fatigue phenomenon with time, a resistance change with three stages was observed and a simple mechanism of the EPIR was proposed.
Authors: Seidai Honda, Hidetoshi Sakamoto, Yoshifumi Ohbuchi, Shinjiro Kawabe, Shigeru Itoh, Yasunori Nakamura
Abstract: Recently, many countries are promoting the collection, the reproduction and the use of consumer goods;aluminum cans, PET bottles, and so on. On the other hand, the reproduction of the glass bottles is not so active excluding use as a returnable bottle, because the recycle cost is high. The glass bottles are fractured by the small fragment for reproduction. The small crushing fragments are called ‘Cullet’. The cullet is melted and molded again as glassware. The surface area is enlarged by making the bottle cullet, and it is possible to melt these efficiently. As a result, it becomes possible to shorten the time to melt the glass bottle and reduce a consumption of the fuel oil. The reasons with not active recycling of the glass bottle are that large-scale crushing equipment is required and it takes a lot of time and cost. This study proposed a new recycling technique for fracturing the glass bottle by using an underwater shockwave by explosive and electric pulse. The shock wave pressures produced by the explosive and the electric pulse energy were measured and the optimum crushing conditions were discussed.
Authors: A.M. Kreshchuk, G.D. Kipshidze, S.V. Novikov, I.G. Savel'ev, A.Ya. Shik
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