Activities of phosphorus in liquid copper by solid oxide galvanic cell

Abstract

The oxygen partial pressures of the equilibrium among solid magnesia, phosphorus-containing liquid copper and trimagnesium phosphate were measured by means of solid-oxide galvanic cells. These cells incorporated magnesia-stabilized zirconia as solid electrolyte and Mo +Mo0 2 as reference electrode at 1473,1 523 and 1 573 K.Then the activities of phosphorus in liquid copper, and the free energy of dissolution of diatomic phosphorus gas into liquid copper at infinite dilution refered to 1 wt. pet. were determined. Untersuchungen derPhosphoraktivitaten in fliissigem Kupfer mit galvanischen Zellen. Die Sauerstoff-Partialdrucke im Gleichgewicht zwischen festem Magnesium, phosphorhaltigem, ftussiqern Kupfer und Trimagnesium-Phosphat werden mit galvanischen Zellen gemessen. Diese Zellen beinhalten magnesiumstabilisierten Zirkon als festen Elektrolyten und Mo + Mo0 2 als Referenzelektrode bei 1473, 1523 und 1573 K. Anschlielsend werden die Phosphoraktivitaten in flussiqern Kupfer bestimmt. Die freie Enthalpie der Auflosunq von zweiatomigem Phosphorgas in flussiqem Kupfer bei unendlicher Verdunnunq bezieht sich auf 1Gew.-%.(1)

Analysis of the deoxidation process of copper with manganese using a platinum electrode-based sensor prepared by MOCVD

“…The Gibbs free energy and the equilibrium constant of reaction (1) at 1,473 K (1,200 °C) using as deoxidizer manganese, iron and phosphorus are given in table I [8,9,[10][11][12][13] . The first and second order interaction parameters for the Cu-O-Fe, Cu-O-P and Cu-O-Mn systems are given in table II [13][14][15] .…”

“…The oxygen activity, hO, is estimated with equation (4) using the experimental oxygen and manganese contents. Then, the value of pO 2(copper) can also be calculated using equation (12). Figure 6 shows the effects of temperature and the reaction time on the pO 2(copper) in the liquid copper with 0.2 mass % initial manganese content.…”

Mass Spectrometric Study on Phosphorus in Molten Carbon-saturated Iron

“…The partial pressure of P 2 in equilibrium with this alloy at the experimental temperature, p P 2 in Cu-P , can be calculated with the following data 16) :…”

Thermodynamic Measurement of Calcium Phosphates by Double Knudsen Cell Mass Spectrometry

“…In this study, the pressure of P 2 in the cell was fixed at the pressure in equilibrium with P in Cu-P alloy instead of control of oxygen potential in the cell. The P content of this alloy was 1.37 mass pct, and the pressure of P 2 in equilibrium with this alloy was calculated from the following data: [18] …”