Vaporization thermodynamics of MgB[sub 2] and MgB[sub 4]

Brutti, S.; Ciccioli, A.; Balducci, G.; Gigli, G.; Manfrinetti, P.; Palenzona, A.
April 2002
Applied Physics Letters;4/22/2002, Vol. 80 Issue 16, p2892
Academic Journal
The vaporization behavior of MgB[sub 2] and MgB[sub 4] under thermodynamic conditions has been studied by the Knudsen effusion-mass spectrometry technique. In the temperature range explored (883–1154 K), magnesium borides are observed to decompose by loss of gaseous Mg only. The equilibrium pressures of Mg(g) have been measured during high-temperature decompositions involving MgB[sub 2]/MgB[sub 4] and MgB[sub 4]/MgB[sub 7] two-phase mixtures and the corresponding standard reaction enthalpies were determined. The decomposition temperatures for MgB[sub 2] and MgB[sub 4] were also inferred by the relevant Van’t Hoff plots. © 2002 American Institute of Physics.


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