ChemInform Abstract: ZUSTANDSDIAGRAMM DES SYST. CU‐P

Abstract

Durch DTA, Gefüge‐ und Röntgenphasenanalyse wurde das Partialdiagramm Cu3P‐CuP2 bestimmt.

The Thermodynamic Properties of Phosphorus and Solid Binary Phosphides

“…Studies of Gibbs energy changes associated with copper phosphide formation consist entirely of vapor pressure studies. The partial pressure of P 4 in equilibrium with CuP 2 and Cu 3 P has been measured by Haraldsen (873-1073 K) and by Ugai et al (963-1173 K) 133,222 using static method techniques; the agreement between the results is impressive. Combining the two results, for In addition to this, Gordienko and Viksman reported the partial pressure of P 4 generated by the decomposition of Cu 3 P. 221 However, the temperatures at which values are reported (1178, 1238, and 1292 K) are higher than the Cu/Cu 3 P eutectic in Figure 17, making the data unusable for calculating assessed thermodynamic properties for Cu 3 P (and thus for CuP 2 as well).…”

“…Studies of Gibbs energy changes associated with copper phosphide formation consist entirely of vapor pressure studies. The partial pressure of P 4 in equilibrium with CuP 2 and Cu 3 P has been measured by Haraldsen (873−1073 K) and by Ugai et al (963−1173 K) , using static method techniques; the agreement between the results is impressive. Combining the two results, for In addition to this, Gordienko and Viksman reported the partial pressure of P 4 generated by the decomposition of Cu 3 P .…”

“…16 Again, use of this technique is limited to systems with high vapor pressures, to ensure accurate measurement of mass loss, and condensation during cooling of the ampule may result in lower than actual reported vapor pressure measurements. Ugai and co-workers developed a similar system for measuring vapor pressures generated by decomposing CuP 2 , 133 based on real-time mass losses in a sealed system. This approach which may merit more consideration.…”