Preparation of Al-Si Master Alloy by Electrochemical Reduction of Volcanic Rock in Cryolite Molten Salt
Preparation of Al-Si Master Alloy by Electrochemical Reduction of Volcanic Rock in Cryolite Molten Salt
复制标题
冰晶石熔盐中火山岩电化学还原制备铝硅中间合金
DOI：
10.1007/s11837-016-1898-x
复制
发表时间：
2016-04
期刊：
影响因子：
2.6
通讯作者：
Wang Zhaowen
中科院分区：
文献类型：
--
作者：
Liu Aimin;Shi Zhongning;Xu Junli;Hu Xianwei;Gao Bingliang;Wang Zhaowen
在中国吉林省龙岗火山群中发现的火山岩具有与阿波罗月球土壤和以前制备的月球土壤模拟物（如约翰逊航天中心月球模拟物和明尼苏达月球模拟物）基本相似的性质。本研究采用电化学方法制备了质量分数为52.7%的Al-Si中间合金NaF-47.3重量% AlF 3熔体加入5重量% 1233 K的火山岩用循环伏安法研究了阴极电化学过程，结果表明Si（IV）的阴极还原是一个两步可逆扩散控制反应。相对于铂准参比电极，在-1.05V下，Si（IV）通过两次电子转移还原为Si（II），浓度为52.7wt% NaF-47.3重量% AlF 3熔盐添加5 wt.%在-1.18 V处的还原峰是铝和硅的共沉积。此外，通过x射线衍射，x射线荧光，扫描电子显微镜和能量色散光谱分析恒电流电解4 h得到的阴极产物。结果表明，产物的相组成为Al，Si，Al 5 FeSi，Al3.21Si0.47，成分为90.5wt.%铝，4.4重量%硅，1.9重量%铁和0.2重量%钛合金
Volcanic rock found in the Longgang Volcano Group in Jilin Province of China has properties essentially similar to Apollo lunar soils and previously prepared lunar soil simulants, such as Johnson Space Center Lunar simulant and Minnesota Lunar simulant. In this study, an electrochemical method of preparation of Al-Si master alloy was investigated in 52.7 wt.%NaF-47.3 wt.%AlF3melt adding 5 wt.% volcanic rock at 1233 K. The cathodic electrochemical process was studied by cyclic voltammetry, and the results showed that the cathodic reduction of Si(IV) is a two-step reversible diffusion-controlled reaction. Si(IV) is reduced to Si(II) by two electron transfers at −1.05 V versus platinum quasi-reference electrode in 52.7 wt.%NaF-47.3 wt.%AlF3molten salt adding 5 wt.% volcanic rock, while the reduction peak at −1.18 V was the co-deposition of aluminum and silicon. In addition, the cathodic product obtained by galvanostatic electrolysis for 4 h was analyzed by means of x-ray diffraction, x-ray fluorescence, scanning electron microscopy and energy dispersive spectrometry. The results showed that the phase compositions of the products are Al, Si, Al5FeSi, and Al3.21Si0.47, while the components are 90.5 wt.% aluminum, 4.4 wt.% silicon, 1.9 wt.% iron, and 0.2 wt.% titanium.
登录
查看更多内容
影响因子：
2.4
作者：
Schwandt, Carsten;Hamilton, James A.;Crawford, Ian A.
通讯作者：
Crawford, Ian A.
影响因子：
--
作者：
R. Balasubramaniam;S. Gokoglu;U. Hegde
通讯作者：
R. Balasubramaniam;S. Gokoglu;U. Hegde
DOI：
10.1007/s11663-010-9411-3
发表时间：
2010-07
期刊：
Metallurgical and Materials Transactions B
影响因子：
--
作者：
Yuhao Lu;D. Mantha;R. Reddy
通讯作者：
Yuhao Lu;D. Mantha;R. Reddy
影响因子：
2.4
作者：
Sanders, Gerald B.;Larson, William E.
通讯作者：
Larson, William E.
CAS-1月壤模拟物
影响因子：
2.6
作者：
Zheng Yongchun;Wang Shijie;Feng Junming
通讯作者：
Feng Junming