The particles of Ml(NiCuAlZn) 5 hydrogen storage alloy (Ml denotes La rich rare earth mixture) were encapsulated with copper in sulfuric acid solution of CuSO 4. The discharge characteristics of the alloy were improve...The particles of Ml(NiCuAlZn) 5 hydrogen storage alloy (Ml denotes La rich rare earth mixture) were encapsulated with copper in sulfuric acid solution of CuSO 4. The discharge characteristics of the alloy were improved, especially at high discharge rates. The XRD analysis indicated that the crystal structure of Ml(NiCuAlZn) 5 remained unchanged in encapsulation. The SEM images showed that copper encapsulation effectively improved the corrosion resistance of the alloy.展开更多
The anomalous phonon properties in YBa_(2)Cu_(3)O_(7)-δ superconductor quenched from different temperatures were obtained by means of IR refiection spectroscopy.The analyses of the data suggest that polarons exist in...The anomalous phonon properties in YBa_(2)Cu_(3)O_(7)-δ superconductor quenched from different temperatures were obtained by means of IR refiection spectroscopy.The analyses of the data suggest that polarons exist in the system,and this may provide a cruicial clue to the mechanism study.展开更多
1 Introduction The infrared and Raman spectroscopy are the active tools for studying the lattice vibrations. Since the discovery of high-temperature superconductor, they have been efficiently used to study the novel o...1 Introduction The infrared and Raman spectroscopy are the active tools for studying the lattice vibrations. Since the discovery of high-temperature superconductor, they have been efficiently used to study the novel oxide superconductor. Some key results were obtained to provide proofs for determining the mechanism of superconductivity. The Pr<sub>x</sub>Y<sub>1-x</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub>, is a useful system for studying the high-temperature superconducting mechanism since all展开更多
文摘The particles of Ml(NiCuAlZn) 5 hydrogen storage alloy (Ml denotes La rich rare earth mixture) were encapsulated with copper in sulfuric acid solution of CuSO 4. The discharge characteristics of the alloy were improved, especially at high discharge rates. The XRD analysis indicated that the crystal structure of Ml(NiCuAlZn) 5 remained unchanged in encapsulation. The SEM images showed that copper encapsulation effectively improved the corrosion resistance of the alloy.
基金This work was supported by the National Science Foundation of China.
文摘The anomalous phonon properties in YBa_(2)Cu_(3)O_(7)-δ superconductor quenched from different temperatures were obtained by means of IR refiection spectroscopy.The analyses of the data suggest that polarons exist in the system,and this may provide a cruicial clue to the mechanism study.
文摘1 Introduction The infrared and Raman spectroscopy are the active tools for studying the lattice vibrations. Since the discovery of high-temperature superconductor, they have been efficiently used to study the novel oxide superconductor. Some key results were obtained to provide proofs for determining the mechanism of superconductivity. The Pr<sub>x</sub>Y<sub>1-x</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub>, is a useful system for studying the high-temperature superconducting mechanism since all
