Determination of the standard gibbs energies of formation of Ba3P2 and Ba3(PO4)2

D. J. Min, N. Sano

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The standard Gibbs energies of formation of barium phosphide and barium orthophosphate were determined by a chemical equilibration technique yielding the following results: 3Ba(1)+P2(g)=Ba3P2 (s) ΔG°=-732,000+156.1T(±12,800) (J/mol) 3BaO (s)+P2(g)+5/2O2(g)=Ba3(PO4)2(s) ΔG°=-2,523,000+580.0 T(±16,600) (J/mol) The stability and the thermodynamic behavior of barium compounds as reaction products of dephosphorization of steel were discussed in terms of the oxygen partial pressure and the activity coefficient of Ba1.5P in molten Ba saturated with CaO.

Original languageEnglish
Pages (from-to)871-877
Number of pages7
JournalMetallurgical Transactions B
Volume20
Issue number6
DOIs
Publication statusPublished - 1989 Dec 1

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energy of formation
Gibbs free energy
Barium
Barium Compounds
barium
Barium compounds
barium compounds
phosphides
Steel
Activity coefficients
Reaction products
reaction products
Partial pressure
partial pressure
Molten materials
Phosphates
steels
Thermodynamics
Oxygen
thermodynamics

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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title = "Determination of the standard gibbs energies of formation of Ba3P2 and Ba3(PO4)2",
abstract = "The standard Gibbs energies of formation of barium phosphide and barium orthophosphate were determined by a chemical equilibration technique yielding the following results: 3Ba(1)+P2(g)=Ba3P2 (s) ΔG°=-732,000+156.1T(±12,800) (J/mol) 3BaO (s)+P2(g)+5/2O2(g)=Ba3(PO4)2(s) ΔG°=-2,523,000+580.0 T(±16,600) (J/mol) The stability and the thermodynamic behavior of barium compounds as reaction products of dephosphorization of steel were discussed in terms of the oxygen partial pressure and the activity coefficient of Ba1.5P in molten Ba saturated with CaO.",
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Determination of the standard gibbs energies of formation of Ba3P2 and Ba3(PO4)2. / Min, D. J.; Sano, N.

In: Metallurgical Transactions B, Vol. 20, No. 6, 01.12.1989, p. 871-877.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Determination of the standard gibbs energies of formation of Ba3P2 and Ba3(PO4)2

AU - Min, D. J.

AU - Sano, N.

PY - 1989/12/1

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N2 - The standard Gibbs energies of formation of barium phosphide and barium orthophosphate were determined by a chemical equilibration technique yielding the following results: 3Ba(1)+P2(g)=Ba3P2 (s) ΔG°=-732,000+156.1T(±12,800) (J/mol) 3BaO (s)+P2(g)+5/2O2(g)=Ba3(PO4)2(s) ΔG°=-2,523,000+580.0 T(±16,600) (J/mol) The stability and the thermodynamic behavior of barium compounds as reaction products of dephosphorization of steel were discussed in terms of the oxygen partial pressure and the activity coefficient of Ba1.5P in molten Ba saturated with CaO.

AB - The standard Gibbs energies of formation of barium phosphide and barium orthophosphate were determined by a chemical equilibration technique yielding the following results: 3Ba(1)+P2(g)=Ba3P2 (s) ΔG°=-732,000+156.1T(±12,800) (J/mol) 3BaO (s)+P2(g)+5/2O2(g)=Ba3(PO4)2(s) ΔG°=-2,523,000+580.0 T(±16,600) (J/mol) The stability and the thermodynamic behavior of barium compounds as reaction products of dephosphorization of steel were discussed in terms of the oxygen partial pressure and the activity coefficient of Ba1.5P in molten Ba saturated with CaO.

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