氟化物熔盐共电沉积制备Gd-Mg中间合金研究  

Preparation of Gd-Mg Master Alloy by Co-electrodeposition Method in Fluoride Molten Salt

作　　者：彭光怀[1] 郭雪锋[1] 邱承洲[1] 韩宝军[1] 方玲[1] 张小联[1] 

机构地区：[1]赣南师范学院化学与生命科学院,江西赣州341000

出　　处：《昆明理工大学学报（理工版）》2010年第2期16-19,26,共5页Journal of Kunming University of Science and Technology(Natural Science Edition)

基　　金：2005年江西省科技厅工业攻关重点项目<高强耐热重稀土镁合金研制>

摘　　要：以混合Gd2O3-MgO为原料,在GdF3-LiF-BaF2-CaF2氟化物熔盐体系中研究一步法共电沉积制备了Gd-Mg中间合金,探讨了电解质成分、原料Gd2O3-MgO中Gd/(Gd+Mg)、电解温度等对电流效率的影响.研究表明,共电沉积得Gd-Mg中间合金以GdMg相存在,成分均匀;随电解质成分GdF3含量、原料Gd2O3-MgO中Gd/(Gd+Mg)、电解温度、电流密度的提高,电流效率均先升后降;当电解质GdF3含量为85wt%、原料Gd2O3-MgO中Gd/(Gd+Mg)为86wt%、电解温度为1 050℃、体电流密度0.10 A/cm3时,电流效率最高达到80%.With mixed Gd2O3 -MgO as raw materials, the preparation of Gd -Mg master alloy by direct co -etectrodeposition in GdF3 - ElF - BaF2 - CaF2 fluoride molten salt system is studied. The effects of electrolyte composition, Gd/（Gd ＋ Mg） of blended stock, electrolysis temperature and current density on current efficiency are then discussed. It is shown through the results that there is a Gd -Mg phase with homogeneous distribution in Gd -Mg master alloy prepared by co - electrodeposition. Current efficiency increases to a certain value at first and thereafter decreases with the increasing of GdF3 content in electrolyte, Gd/（Gd ＋ Mg） of blended stock, electrolysis temperature and volume current density. The optimal operating conditions are 85 wt% content of GdF3 in electrolyte, 86 wt% Gd content of alloy,0.10 A/cm3 of volume current density and the temperature of 1 050℃.

关 键 词：氟化物熔盐 共电沉积 电流效率 Gd—Mg中间合金 

分 类 号：O646.541[理学—物理化学]