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A high‐temperature mass spectrometric study of the vaporization processes of fluxes based on CaO–CaCl 2 and CaO–CaF 2 systems
Author(s) -
Stolyarova V. L.,
Seetharaman S.,
Svard D.,
Semenov G. A.
Publication year - 1998
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19981015)12:19<1335::aid-rcm295>3.0.co;2-h
Subject(s) - vaporization , chemistry , knudsen number , thermodynamics , partial pressure , atmospheric temperature range , vapor pressure , analytical chemistry (journal) , environmental chemistry , oxygen , organic chemistry , physics
The high‐temperature Knudsen effusion method was used to study the vaporization processes and thermodynamic properties of fluxes based on CaO–CaCl 2 and CaO–CaF 2 systems with additions of Al, Al 2 O 3 in the temperature range 800–2240 K. The composition of vapour and the partial pressures of vapour species as a function of temperature and vaporization time of fluxes were obtained. Vaporization enthalpies of components and dependences of partial pressures as a function of temperature are suggested for practical needs based on the experimental results. Reliability of the data obtained in the present study was confirmed by comparison with the reference values for Au, CsCl, CaCl 2 and CaF 2 . © 1998 John Wiley & Sons, Ltd.