Vaporization processes and thermodynamic properties of oxide systems at high temperatures: Experimental study and modeling

Stolyarova, V. L.; Plotnikov, E. N.

doi:10.1007/s10720-005-0022-z

Cited by 5 publications

(17 citation statements)

References 6 publications

(7 reference statements)

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“…Passing from the regularities of vaporization of individual oxides [8] Vaporization of silicate, germanate, borate and phosphate melts, in addition to the processes of polymerization and dissociation, is also accompanied by the association of vapour molecular forms, which leads to the identification of new compounds in the gas phase. The formation of such compounds is due to various factors, including the interaction of oxides in the condensed or gas phase.…”

Section: Vaporization Features Of Oxide Systemsmentioning

confidence: 99%

“…The vapour composition over the binary phosphate, borate and silicate systems identified by high temperature mass spectrometric method was summarized and grouped according to the number of outer valence electrons of an oxide modifier [4,8,15]. This consideration was carried out at high temperatures, when the partial pressures of the vapour species were in the ranges 10 -9 -10 -4 bar.…”

Section: Vaporization Features Of Oxide Systemsmentioning

confidence: 99%

“…The increase of the volatility in the binary systems in the rows of the System and the predominance of the dissociative forms in vapour were connected with the increase of the lattice energy of the individual oxides, the decrease of the enthalpy of formation of the individual oxides and the decrease of the differences of the electron potentials of oxides forming binary oxide systems. Despite the complex vapour composition over the oxide systems, the order of their relative volatility at constant temperatures was in agreement with the main regularities, observed earlier for the other types of inorganic compounds: the increase of the relative volatility of the systems from the first to the sixth period and its decrease from the first to the sixth group of the Periodic Table. The question on formation of the dimer molecules in vapour over binary and multicomponent systems and its dependence from the temperature may be clear from the consideration [8].…”

Section: Vaporization Features Of Oxide Systemsmentioning

confidence: 99%

“…The previous results on the mass spectrometric studies of the vaporization processes and thermodynamic properties of oxide systems and materials were summarized in the monograph [1] and reviews [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…As to the subjects of investigations as binary and multicomponent borate, germanate, phosphate and silicate systems as well as the unique information on vaporization processes and thermodynamic properties at high temperatures the publications mentioned [1][2][3][4][5][6][7][8][9][10] still have the pioneer character including the mass spectrometric approaches for study thermodynamic functions of components in these systems at condensed phase. Only some of there results were reproduced recently in USA, France, Germany and Japan [1,4,5].…”

Section: Introductionmentioning

confidence: 99%

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High Temperature Mass Spectrometric Study of Thermodynamic Properties and Vaporization Processes of Oxide Systems: Experiment and Modeling

Stolyarova¹

2013

TOTHERJ

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Abstract:The unique opportunities and features of high temperature mass spectrometric method for study vaporization processes and thermodynamic properties of oxide systems and materials (glasses, ceramics and coatings) were considered. Various types of vapour species were found over oxide systems studied such as the associated, dissociated and polymerized products of vaporization. The regularities of the vaporization of the binary and multicomponent oxide systems according to the position of oxide modifier in the Periodic table of atoms were illustrated and discussed from the point of view of the acid-base concept. Results on determination of thermodynamic functions in oxide systems were considered taking into account the main requirements for the confirmation of their reliability. Thermodynamic functions of oxide systems studied showed various signs of the deviations from the ideality. The general lattice theory of associated solutions was used for the calculation of thermodynamic properties of the ternary silicate melts studied. Based on this theory the correlation between thermodynamic functions obtained in the systems under consideration and the number of various types of bonds formed in these melts was illustrated. Using this approach the different levels of deviations from the ideality in the melts studied were clarified. Examples of the practical applications of high temperature mass spectrometry for developing advanced materials were shown.

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Section: Vaporization Features Of Oxide Systemsmentioning

confidence: 99%

Section: Vaporization Features Of Oxide Systemsmentioning

confidence: 99%

Section: Vaporization Features Of Oxide Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High Temperature Mass Spectrometric Study of Thermodynamic Properties and Vaporization Processes of Oxide Systems: Experiment and Modeling

Stolyarova¹

2013

TOTHERJ

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Knudsen effusion mass spectrometry: Current and future approaches

Jacobson,

Colle,

Stolyarova

et al. 2024

Rapid Comm Mass Spectrometry

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RationaleKnudsen effusion mass spectrometry (KEMS) has been a powerful tool in physical chemistry since 1954. There are many excellent reviews of the basic principles of KEMS in the literature. In this review, we focus on the current status and potential growth areas for this instrumental technique.MethodsWe discuss (1) instrumentation, (2) measurement techniques, and (3) selected novel applications of the technique. Improved heating methods and temperature measurement allow for better control of the Knudsen cell effusive source. Accurate computer models of the effusive beam and its introduction to the ionizer allow optimization of such parameters as sensitivity and removal of background signals. Computer models of the ionizer allow for optimized sensitivity and resolution. Additionally, data acquisition systems specifically tailored to a KEMS system permit improved quantity and quality of data.ResultsKEMS is traditionally utilized for thermodynamic measurements of pure compounds and solutions. These measurements can now be strengthened using first principles and model‐based computational thermochemistry. First principles can be used to calculate accurate Gibbs energy functions (gefs) for improving third law calculations. Calculated enthalpies of formation and dissociation energies from ab initio methods can be compared to those measured using KEMS. For model‐based thermochemistry, solution parameters can be derived from measured thermochemical data on metallic and nonmetallic solutions. Beyond thermodynamic measurements, KEMS has been used for many specific applications. We select examples for discussion: measurements of phase changes, measurement/control of low‐oxygen potential systems, thermochemistry of ultrahigh‐temperature ceramics, geological applications, nuclear applications, applications to organic and organometallic compounds, and thermochemistry of functional room temperature materials, such as lithium ion batteries.ConclusionsWe present an overview of the current status of KEMS and discuss ideas for improving KEMS instrumentation and measurements. We discuss selected KEMS studies to illustrate future directions of KEMS.

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Seal glass for solid oxide fuel cells

Mahapatra

2010

Journal of Power Sources

173

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Vaporization processes and thermodynamic properties of oxide systems at high temperatures: Experimental study and modeling

Cited by 5 publications

References 6 publications

High Temperature Mass Spectrometric Study of Thermodynamic Properties and Vaporization Processes of Oxide Systems: Experiment and Modeling

High Temperature Mass Spectrometric Study of Thermodynamic Properties and Vaporization Processes of Oxide Systems: Experiment and Modeling

Knudsen effusion mass spectrometry: Current and future approaches

Seal glass for solid oxide fuel cells

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