Mass spectrometric study of the vaporization and thermodynamic properties of components in the BaO-TiO2-SiO2 system

Stolyarova, V. L.; Лопатин, С. И.

doi:10.1007/s10720-005-0034-8

Cited by 13 publications

(12 citation statements)

References 3 publications

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“…Stolyarova and Lopatin [56] measured the activity of SiO 2 in the BaO-TiO 2 -SiO 2 system at 1900 K using hightemperature differential mass spectrometry. The activity of SiO 2 in the TiO 2 -SiO 2 system at 1900 K for TiO 2 -SiO 2 1:1 is only available.…”

Section: The Binary Tio 2 -Sio 2 Systemmentioning

confidence: 99%

Liquid Immiscibility and Thermodynamic Assessment of the Al2O3–TiO2–SiO2 System

Ilatovskaia

Fabrichnaya

2022

J. Phase Equilib. Diffus.

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Phase equilibria in the TiO2–SiO2 system have been studied experimentally using DTA and SEM/EDX. The thermodynamic parameters for the TiO2–SiO2 system have been assessed considering new experimental data of the present work and from the literature. Moreover, the miscibility of the liquid in the Al2O3–TiO2–SiO2 system has been studied at 2013 K in air and shrinkage of the miscibility gap at 3.8 mol% Al2O3 has been demonstrated. The experimental data obtained in the present work and literature as well as the thermodynamic databases for the binary Al2O3–TiO2, TiO2–SiO2, and Al2O3–SiO2 systems have been used to derive the thermodynamic description of the Al2O3–TiO2–SiO2 system using the CALPHAD approach. Solid phases have been modeled using the compound energy formalism. The liquid phase has been described by the two-sublattice partially ionic liquid model. A set of self-consistent parameters have been proposed, which resulted in a reasonably good agreement between the calculated and experimental data on the phase equilibria, liquid immiscibility, and thermodynamic properties in the Al2O3–TiO2–SiO2 system.

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Section: The Binary Tio 2 -Sio 2 Systemmentioning

confidence: 99%

Liquid Immiscibility and Thermodynamic Assessment of the Al2O3–TiO2–SiO2 System

Ilatovskaia

Fabrichnaya

2022

J. Phase Equilib. Diffus.

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“…In [63], calculated data on the activity of SiO 2 in the TiO 2 -SiO 2 system at 1527, 1627, and 2527 • C are also presented. Unfortunately, there is only one experimental point at 1627 • C for the TiO 2 : SiO 2 molar ratio of 1 : 1 [65]. A strong positive deviation from ideality and the inflection point of the liquidus arises due to the presence of liquid phase separation (Fig.…”

Section: Tio 2 -Sio 2 Systemmentioning

confidence: 99%

Phase equilibria and materials in the TiO2-SiO2-ZrO2 system: a review

Kirillova¹,

Almjashev²,

Stolyarova³

2021

Nanosystems: Phys. Chem. Math.

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This paper analyzes the available data on phase equilibria in the TiO 2 -SiO 2 -ZrO 2 system. The advantages of specialized databases and software systems for the analysis of information on phase equilibria are pointed. Phase diagrams are kind of a roadmap for the design of materials. As shown in the review, nanomaterials are no exception to this. Data on phase equilibria, such as eutectic points, solubility limits, binodal and spinodal curves, make it possible to predict the possibility of the formation of nanoscale structures and materials based on them. In its turn during the transition to the nanoscale state, the mutual component solubility, the temperature of phase transformation may change significantly, and other features may become observable. This provides additional variability when choosing compositions and material design based on the phases of a given system. As an example, for design of nuclear fuel assemblies that are tolerant to severe accidents at nuclear power plants, mixed carbides (so-called MAX-phases) are considered as one of the most promising options as nanoscale layers on fuel cladding. It is suggested that the materials of the TiO 2 -SiO 2 -ZrO 2 system, which are the product of oxidation of some MAX-phases, can serve as an inhibitor of their further corrosion. Ensuring the stability of materials based on MAX-phases expands their prospects in nuclear power. This requires comprehensive information about phase equilibria and formation conditions of nanostructured states in the analyzed system.

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“…Thermodynamic functions of the systems under consideration such as activities and chemical potentials of components as well as the Gibbs energies showed various signs of the deviations from the ideal behaviour. The features of thermodynamic description of the melts in the following systems studied recently may be found also as mentioned above for the Na 2 O-B 2 O 3 -SiO 2 [22,23] [8,33,36] systems. The negative deviations from the ideal behaviour were observed in the melts of all these systems except CaO-TiO 2 -SiO 2 and BaO-TiO 2 -SiO 2 glasses and melts where the existence of the wide immiscibility regions may be expected as in the TiO 2 -SiO 2 system according to [47].…”

Section: Thermodynamic Data Of Oxide Systems Studied By High Temperatmentioning

confidence: 68%

“…[8,33,36] Because of this reason it was traditional approach when all thermodynamic functions obtained in oxide systems by the method mentioned were considered -from the point of view of the necessary stability conditions as regards the continuous nature its change of state; -as the verification of the mutual agreement of the data using the Gibbs-Duhem equation;…”

Section: Thermodynamic Data Of Oxide Systems Studied By High Temperatmentioning

confidence: 99%

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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Mass spectrometric study of the vaporization and thermodynamic properties of components in the BaO-TiO2-SiO2 system

Cited by 13 publications

References 3 publications

Liquid Immiscibility and Thermodynamic Assessment of the Al2O3–TiO2–SiO2 System

Liquid Immiscibility and Thermodynamic Assessment of the Al2O3–TiO2–SiO2 System

Phase equilibria and materials in the TiO2-SiO2-ZrO2 system: a review

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

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