Direct electrolytic preparation of La0.5Ce0.5Ni5 alloy in molten salt

作者：Zhang Qing Jun; Tian Ying; Wang Ling^*; Dai Lei; Li Yue Hua; Qu Mei Ling; Cui Chun Xiang

来源：Journal of Functional Materials, 2010, 41(7): 1257-1260.

• Analytical results
• Carbon rod
• Constant voltage
• Deoxidation
• Electro-deoxidization
• Electrolytic preparation
• High density
• La0.5Ce0.5 Ni5
• Molten salt
• Reduction mechanisms
• SEM
• Sintered pellets
• XRD
• XRD patterns

La0.5Ce0.5Ni5 alloy was prepared via the electrochemical deoxidation in a molten CaCl2 electrolyte at 850°C by constant voltage electrolysis, with sintered pellets of a mixture of La2O3, CeO2 and NiO as cathode and high density carbon rod as anode. The analytical results of XRD and SEM show that the sample sintered at 1050°C can be deoxidized to La0.5Ce0.5Ni5 alloy when samples were electrolyzed at voltage of 3.1 V for 12 h. XRD patterns of samples electrolyzed at voltage of 3.1 V for different times show that the reduction mechanism is that firstly NiO was reduced to Ni, and then LaOCl and CeOCl were reduced to La and Ce on the surface of newly formed Ni and form La0.5Ce0.5Ni5 alloy. Whereas LaOCl and CeOCl came from La2O3 reaction with CaCl2 and CeO2 partially reduced.

• 出版日期2010
• 单位河北工业大学; 华北理工大学