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铝电解“一高四低”工艺技术研究 被引量:4
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作者 刘忠琼 《有色冶炼》 2001年第2期10-13,共4页
在采用点式下料、Al2 O3浓度控制技术的基础上 ,对槽电压、分子比、电解温度、AE系数等工艺技术条件进行综合研究 ,提出铝电解“一高四低”工艺技术 ,并与传统的工艺进行了对比 ,结果表明该技术可大幅度提高电流效率 。
关键词 点式下料 电角温度 流效率 分子比 AE系数 氧化铝 炼铝
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Electrochemical nucleation and growth of aluminum nanoparticles and leaf-like flat microstructures from reline deep eutectic solvent: Effect of temperature and angular speed of working electrode
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作者 G.VIDAL-GARCÍA C.E.GUINTO-PANO +5 位作者 I.GARCÍA-HERNÁNDEZ E.RODRÍGUEZ-CLEMENTE P.MORALES-GIL M.T.RAMÍREZ-SILVA M.ROMERO-ROMO M.PALOMAR-PARDAVÉ 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第3期1050-1060,共11页
The main objective of this work was to use reline deep eutectic solvent,containing Al(III)ions,for the electrochemical study of the nucleation and growth of aluminum onto a glassy carbon electrode at different tempera... The main objective of this work was to use reline deep eutectic solvent,containing Al(III)ions,for the electrochemical study of the nucleation and growth of aluminum onto a glassy carbon electrode at different temperatures and angular speeds(ω)of the working electrode.In order to fulfill this,electrochemical and surface characterization techniques were used.It was found that as temperature increased,the onset of the Al(III)DES reduction occurred at less negative potentials while the current peak of the voltammograms increased.These indicate that Al deposition thermodynamics and kinetics were favored.Practically,no anodic current was detected due to Al passivation by Al(OH)_(3)(s)andγ-Al_(2)O_(3)(s).Atω=0 r/min,the Al deposition chronoamperograms were analyzed by a theoretical model comprising Al 3D diffusion-controlled nucleation and growth and residual water reduction.However,those recorded at different angular speeds were analyzed with a theoretical model where adsorption−desorption and diffusion-controlled nucleation−growth occurred simultaneously.The deposits were characterized by SEM,EDX,XPS and XRD.Atω=0 r/min,formation of well distributed nanoparticles((78.1±9.5)nm)was observed,while atω=900 r/min the deposit was formed by multiple 10μm diameter leaf-like flat microstructures,composed by Al,Al(OH)_(3)(s)andγ-A2O3(s). 展开更多
关键词 ALUMINUM electrochemical nucleation deep eutectic solvent angular speed of working electrode temperature
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