Partial Pressures for Several In-Se Compositions from Optical Absorbance of the Vapor
Document Type
Article
Publication Date
10-2002
Publisher
Springer
Source Publication
Journal of Phase Equilibria
Source ISSN
1054-9714
Abstract
The optical absorbance of the vapor phase over various In-Se compositions between 33.3–60.99 at.% Se and 673–1418 K was measured and used to obtain the partial pressures of Se2(g) and In2Se(g). The results are in agreement with silica Bourdon gauge measurements for compositions between 50–61 at.%, but significantly higher than those from Knudsen cell and simultaneous Knudsen-torsion cell measurements. It is found that 60.99 at.% Se lies outside the sesquiselenide homogeneity range and 59.98 at.% Se lies inside and is the congruently melting composition. The Gibbs energy of formation of the liquid from its pure liquid elements between 1000–1300 K is essentially independent of temperature and falls between −36 to −38 kJ per g atomic weight for 50 and 56% Se at 1200 and 1300 K.
Recommended Citation
Brebrick, Robert F., "Partial Pressures for Several In-Se Compositions from Optical Absorbance of the Vapor" (2002). Mechanical Engineering Faculty Research and Publications. 256.
https://epublications.marquette.edu/mechengin_fac/256
Comments
Journal of Phase Equilibria, Vol. 23, No. 5 (October 2002): 397-408. DOI.