Activities of chromium in molten copper at dilute concentrations by solid-state electrochemical cell
Activities of chromium in molten copper at dilute concentrations by solid-state electrochemical cell
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DOI：
10.1007/bf02654285
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发表时间：
1991-08
期刊：
影响因子：
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通讯作者：
T. Inouye;H. Fujiwara;M. Iwase
中科院分区：
文献类型：
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作者：
T. Inouye;H. Fujiwara;M. Iwase
为了获得稀浓度下铜液中铬的活度（<0.008铬摩尔分数），使液态铜与用Cr2 O3（s）饱和的熔融CaCl 2 + Cr2 O3渣在1423和1573 K之间达到平衡，用Mo/Mo + MoO 2/ZrO 2（MgO）/（Cu + Cr））合金+Cr2 O3+型固体氧化物原电池测定平衡氧分压（CaCl_2 + Cr_2O_3）渣/Mo。固态铬在熔融铜中溶解的自由能变化为Cr（s）= Cr（1 wt %，在Cu中）和ΔG° = +97，000 + 73.3（T/K）± 2，000 J mol−1。
In order to obtain the activities of chromium in molten copper at dilute concentrations (<0.008 chromium mole fractions), liquid copper was brought to equilibrium with molten CaCl2+ Cr2O3slag saturated with Cr2O3(s), at temperatures between 1423 and 1573 K, and the equilibrium oxygen partial pressures were measured by means of solid-oxide galvanic cells of the type Mo/Mo + MoO2/ZrO2(MgO)/(Cu + Cr))alloy + Cr2O3+ (CaCl2+ Cr2O3)slag/Mo. The free energy changes for the dissolution of solid chromium in molten copper at infinite dilution referred to 1 wt pct were determined as Cr (s) = Cr(1 wt pct, in Cu) and ΔG° = + 97,000 + 73.3(T/K) ±2,000 J mol−1.