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An Electrochemical Study of Equilibria involving Di-calciura and Tri-calcium Phosphates

机译:磷酸二钙和磷酸三钙平衡的电化学研究

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An electrochemical technique incorporating a solid oxide galvanic cell was employed at temperatures between 1,423 and 1,523K to obtain the free energy change for the reaction: 2Ca_3P_2O_8(s) + P_2(g) h- (5/2)O_2 (g) = 3Ca_2P_2O_7(s) The cell used for this study can be represented by the formulation: +)Mo / Mo + MoO_2 / ZrO_2 (MgO) / {Cu-P} alloy + Ca_3P_2O_8 + Ca_2P_2O_7 / Mo(The results obtained can be expressed in terms of the following equation: tri-calcium phosphates: 2 Ca_3P_2O_8(s) + P_2O_5(l) = 3 Ca_2P_2O_7(s) strang G deg Jumol~(-1) = -361,500 - 56.4 (77K) log aP_2O_5 = - 2.950 - 18,840/(77K) This has important implications in the design and selection of slags for the dephosphorization of hot metal during iron and steelmaking processes.
机译:在1,423和1,523K之间的温度下采用了结合了固体氧化物原电池的电化学技术来获得反应的自由能变化:2Ca_3P_2O_8(s)+ P_2(g)h-(5/2)O_2(g)= 3Ca_2P_2O_7 (s)用于该研究的电池可以用以下公式表示:+)Mo / Mo + MoO_2 / ZrO_2(MgO)/ {Cu-P}合金+ Ca_3P_2O_8 + Ca_2P_2O_7 / Mo(获得的结果可以表示为以下等式的三磷酸钙:2 Ca_3P_2O_8(s)+ P_2O_5(l)= 3 Ca_2P_2O_7(s)弯曲G度Jumol〜(-1)= -361,500-56.4(77K)log aP_2O_5 =-2.950-18,840 /(77K)这对于钢铁制造过程中铁水脱磷炉渣的设计和选择具有重要意义。

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