Abstract
The phase relations for the Ag-Pb-O system saturated with alumina and the activity coefficient of AgO 0.5 in the PbO melt were investigated at 1273K. A chemical equilibrium technique and an EMF method were applied to the measurement. In this system, there is a miscibility gap between a molten Ag-Pb alloy phase and a Pb-Ag-O oxide phase. The solubility of Ag in the oxide phase and that of Pb in the metal phase were studied as a relation of the partial oxygen pressure. These results suggest that component of silver oxide in liquid PbO phase should be represented as AgO 0.5. The activity coefficient of AgO 0.5 in the PbO based oxide melt at infinite dilution relative to pure solid AgO 0.5 is 0.602 at 1273 K.
| Original language | English |
|---|---|
| Pages (from-to) | 1861-1864 |
| Number of pages | 4 |
| Journal | Materials Transactions |
| Volume | 46 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2005 Aug |
| Externally published | Yes |
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Keywords
- Cupellation
- Silver oxide
- Silver-lead-oxygen system
- Thermodynamics
ASJC Scopus subject areas
- Materials Science(all)
- Metals and Alloys
Cite this
Thermodynamic study on the Ag-Pb-O system at 1273 K. / Ueda, Shigeru; Kumagai, Tomomasa; Yamaguchi, Katsunori.
In: Materials Transactions, Vol. 46, No. 8, 08.2005, p. 1861-1864.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Thermodynamic study on the Ag-Pb-O system at 1273 K
AU - Ueda, Shigeru
AU - Kumagai, Tomomasa
AU - Yamaguchi, Katsunori
PY - 2005/8
Y1 - 2005/8
N2 - The phase relations for the Ag-Pb-O system saturated with alumina and the activity coefficient of AgO 0.5 in the PbO melt were investigated at 1273K. A chemical equilibrium technique and an EMF method were applied to the measurement. In this system, there is a miscibility gap between a molten Ag-Pb alloy phase and a Pb-Ag-O oxide phase. The solubility of Ag in the oxide phase and that of Pb in the metal phase were studied as a relation of the partial oxygen pressure. These results suggest that component of silver oxide in liquid PbO phase should be represented as AgO 0.5. The activity coefficient of AgO 0.5 in the PbO based oxide melt at infinite dilution relative to pure solid AgO 0.5 is 0.602 at 1273 K.
AB - The phase relations for the Ag-Pb-O system saturated with alumina and the activity coefficient of AgO 0.5 in the PbO melt were investigated at 1273K. A chemical equilibrium technique and an EMF method were applied to the measurement. In this system, there is a miscibility gap between a molten Ag-Pb alloy phase and a Pb-Ag-O oxide phase. The solubility of Ag in the oxide phase and that of Pb in the metal phase were studied as a relation of the partial oxygen pressure. These results suggest that component of silver oxide in liquid PbO phase should be represented as AgO 0.5. The activity coefficient of AgO 0.5 in the PbO based oxide melt at infinite dilution relative to pure solid AgO 0.5 is 0.602 at 1273 K.
KW - Cupellation
KW - Silver oxide
KW - Silver-lead-oxygen system
KW - Thermodynamics
UR - http://www.scopus.com/inward/record.url?scp=26944502355&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=26944502355&partnerID=8YFLogxK
U2 - 10.2320/matertrans.46.1861
DO - 10.2320/matertrans.46.1861
M3 - Article
VL - 46
SP - 1861
EP - 1864
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 8
ER -