Preparation of boron in KCI-KBF4 molten salt
The optimum conditions of molten salts electrolysis in the KCI-KBF4 system was researched by orthogonal experiment, which were set as temperature 750 ℃, KBF4:KCI 1:4 (wt.％), electrolysis time 3 h and cathode current density 1.5 A/cm2. The purity of boron was more than 96％ and the current efficiency was more than 80％ were obtained under this condition. Amorphous boron powder electrolyzed from KCI-KBF4 system was agglomeration seriously, and the particle size became larger as the electrolysis time prolonged. The main impurities in the boron were Fe, Si, Cr, Ni and C, etc. The cyclic voltammetry was introduced for the electrochemical mechanism research. The mechanism of boron deposition in the KCI-KBF4 system was one-step reversible process with 3-electron. The process was diffusion controlled and the diffusion coefficient of reactive substance BF4- was 1.64×10-5 cm2/s.
boron KC1-KBF4 electrolysis electrochemical
PENG Cheng CHEN Song CAI Zhenping WU Yanke WANG Youmeng
Division of Mineral Resources, Metallurgy & Materials, General Research Institute for Non-Ferrous Me Middle School Attached to Beijing Medical University, Beijing 100083, China
国际会议
The 3rd Asian Conference on Molten Salts and Ions Liquids 2011(第三届亚洲熔盐与离子液体会议)
哈尔滨
英文
14-18
2011-01-06（万方平台首次上网日期，不代表论文的发表时间）