High Temperature Behavior of Oxide Systems Containing Rare Earth Elements

Stolyarova, V. L.; Vorozhtcov, Viktor A.

doi:10.1134/s0040579522040170

Cited by 5 publications

(9 citation statements)

References 60 publications

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“…Semenov, 5 a number of reviews dealing with the vaporization and thermodynamic properties of oxide systems studied using KEMS at high temperatures have been completed. [185][186][187][188][189][190][191][192][193][194][195][196][197][198][199][200][201][202] The general overview in this area was presented in the series of publications from decade to decade. [185][186][187][188][189][190] We can delineate them into three main groups: glassforming oxide systems, [191][192][193][194][195][196] ultrahigh-refractory oxide systems mainly based on 2, [197][198][199] modeling approaches developed using the Knudsen effusion mass spectrometric thermodynamic data on oxide systems for the prediction of their high-temperature behavior, 189,[193][194][195][196]200,201 and comparison to thermodynamic data that may be obtained at high temperatures using KEMS and differential thermal analysis.…”

Section: Following the Publication Of The Monograph By Stolyarova Andmentioning

confidence: 99%

“…[203][204][205][206][207][208][209] It should be mentioned that, although not included in the reviews discussed earlier, recent experimental data obtained using KEMS at high temperatures on oxide systems and materials for nuclear We next focus on the latest experimental data on the vaporization and thermodynamic properties of binary and multicomponent systems containing rare-earth and hafnium oxides. [197][198][199][219][220][221][222][223][224][225] In recent years, the composition of vapor, the temperature dependences of partial pressures of the vapor species, properties and relating physicochemical characteristics to structure.…”

Section: Following the Publication Of The Monograph By Stolyarova Andmentioning

confidence: 99%

“…Following the publication of the monograph by Stolyarova and Semenov, 5 a number of reviews dealing with the vaporization and thermodynamic properties of oxide systems studied using KEMS at high temperatures have been completed 185–202 . The general overview in this area was presented in the series of publications from decade to decade 185–190 .…”

Section: Measurements Of Partial Pressures and Thermodynamic Properti...mentioning

confidence: 99%

“…Research by both experimental methods of high‐temperature chemistry and within the framework of model approaches produces modern databases of thermodynamic data and model parameters, such as TAF‐ID 227 . This includes databases for the commonly used computational thermochemistry codes, such as FactSage or ThermoCalc, for predicting physicochemical properties and phase equilibria in oxide systems and materials 197–200,222–225 …”

Section: Measurements Of Partial Pressures and Thermodynamic Properti...mentioning

confidence: 99%

See 3 more Smart Citations

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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Section: Following the Publication Of The Monograph By Stolyarova Andmentioning

confidence: 99%

Section: Following the Publication Of The Monograph By Stolyarova Andmentioning

confidence: 99%

Section: Measurements Of Partial Pressures and Thermodynamic Properti...mentioning

confidence: 99%

Section: Measurements Of Partial Pressures and Thermodynamic Properti...mentioning

confidence: 99%

See 2 more Smart Citations

Knudsen effusion mass spectrometry: Current and future approaches

Jacobson,

Colle,

Stolyarova

et al. 2024

Rapid Comm Mass Spectrometry

View full text Add to dashboard Cite

show abstract

“…Настоящий обзор, как и выполненные ранее [1][2][3], продолжает систематическое рассмотрение последних экспериментальных данных о термодинамических свойствах и процессах испарения керамики на основе оксидов гафния и редкоземельных элементов, которые изучены методом высокотемпературной масс-спектрометрии до температур 3000 К. Несмотря на то что актуальность данных исследований обсуждалась неоднократно, необходимо отметить, что она продиктована широким спектром применения материалов на основе рассматриваемых оксидов в самых разнообразных областях, таких как металлургия, производство стекла и стеклокерамики, а также разработка защитных огнеупоров и катализ. Исключительной особенностью редкоземельных металлов являются специфические спектры излучения ионов, состоящие из узких полос в характерных спектральных участках, что позволяет разрабатывать на их основе люминофоры с заданными спектрами излучения.…”

Section: Introductionunclassified

High temperature thermodynamic properties of ceramics based on hafnium and rare earth oxides

Stolyarova¹,

Vorozhtcov²,

Соколова³

2023

TKSC RAS

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In the review results of thermodynamic properties and vaporization processes of ceramics based on hafnium and rare earth oxides studied during recent years using high temperature mass spectrometry up to the temperature 3000 K were classified. Advantages of semi-empirical and statistical thermodynamic approaches for the prediction of thermodynamic properties of multicomponent systems based on oxides considered were illustrated.

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Development of the High‐Temperature Knudsen Effusion Mass Spectrometry in the Nordic Countries

Stolyarova,

Shilov,

Vorozhtcov

2024

steel research int.

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In this article, a brief review of the development of the Knudsen effusion mass spectrometric (KEMS) approach in the Theoretical Metallurgy Department of the KTH Royal Institute of Technology and in the in the Laboratory of Metallurgy of the Helsinki University of Technology and modifications of quadrupole model QMG420 mass spectrometers, is presented. The thermodynamic data obtained from vaporization of standards, such as NaCl, CsCl, B2O3, and Ag, and of the B2O3–Al2O3 and ZnO–P2O5 systems is compared with the data obtained using a magnetic MS1301 mass spectrometer. For the first time, composition of the vapor phase over the Dy2O3–DyF3, CaO–CaCl2, and Cu–Mg systems and the partial pressures of components at high temperatures are investigated. The experimental data obtained for the investigated systems are used for prediction of the vaporization processes and modeling of thermodynamic properties and high‐temperature phase equilibria in the multicomponent systems used in metallurgy. An account is given of the detailed studies of the vaporization processes and thermodynamic properties of some multicomponent systems composed of oxides, fluorides, and carbonates forming mold powders for continuous casting of steel. Some new directions of the ongoing studies by the KEMS method are summarized.

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High Temperature Behavior of Oxide Systems Containing Rare Earth Elements

Cited by 5 publications

References 60 publications

Knudsen effusion mass spectrometry: Current and future approaches

Knudsen effusion mass spectrometry: Current and future approaches

High temperature thermodynamic properties of ceramics based on hafnium and rare earth oxides

Development of the High‐Temperature Knudsen Effusion Mass Spectrometry in the Nordic Countries

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