Thermodynamics and (p,T,x) phase diagram of (barium oxide + diyttrium trioxide)

Marushkin, K. N.

doi:10.1006/jcht.1995.0048

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…DG°{3} and DG°{7} can be estimated from literature data. 18,19,40,41 The Gibbs energy can be expressed as a function of the partial pressure of CO 2 through the expressions…”

Section: And Chemical Stability Of Bzy-materialsmentioning

confidence: 99%

Effect of CO₂ Exposure on the Chemical Stability and Mechanical Properties of BaZrO₃‐Ceramics

et al. 2016

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The reactivity of BaZrO3 with CO2 has been addressed as one of the major challenges with BaZrO3-based electrolytes in proton ceramic fuel cells. Here, we present a study of the effect of CO2 exposure of BaZrO3-materials at elevated temperatures. Dense BaZr1-xYxO3-δ (x = 0, 0.05, 0.1, 0.2) and BaCe0.2Zr0.7Y0.1O2.95 ceramics were prepared by conventional sintering of powder prepared by spray pyrolysis. The Vickers indentation method was used to determine the hardness and estimate the fracture toughness of pristine materials as well as the corresponding materials exposed to CO2. Formation of BaCO3 on the surface of exposed ceramics was confirmed by X-ray diffraction and electron microcopy. The reaction resulted in formation of Ba-deficient perovskite at the exposed surface. The reaction with CO2 was most pronounced at 650 ºC compared to the other temperatures applied in the study. The reactivity was also shown to depend on the Y-content and the grain size and was most pronounced for BaZr0.9Y0.1O3-δ. The reaction with CO2 was observed to have a profound effect on the fracture toughness of the ceramics, demonstrating a depression of the mechanical stability of the materials. The results are discussed with respect to the chemical and mechanical stability of BaZrO3 materials, with particular emphasis on the composition and grain size.

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“…DG°{3} and DG°{7} can be estimated from literature data. 18,19,40,41 The Gibbs energy can be expressed as a function of the partial pressure of CO 2 through the expressions…”

Section: And Chemical Stability Of Bzy-materialsmentioning

confidence: 99%

Effect of CO₂ Exposure on the Chemical Stability and Mechanical Properties of BaZrO₃‐Ceramics

et al. 2016

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“…Data necessary for construction of phase diagrams (as homogeneity ranges, solubilities) can also be obtained from vaporisation experiments carried out by Knudsen effusion mass spectrometry [22,[56][57][58].…”

Section: Thermodynamic Propertiesmentioning

confidence: 99%

Twenty Years of Knudsen Effusion Mass Spectrometry: Studies Performed in the Period 1990-2010

Miller

Armatys²

2013

TOTHERJ

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Investigations carried out by Knudsen effusion mass spectrometry on metals, alloys, oxides, and fullerene systems in the period 1990-2010 are reviewed in the present paper. 362 original papers were published in this period by ca. 45 research groups thereby showing still large activity in this unique area. The fundamentals and recent developments of the method are briefly reported. Data to the systems studied, temperature ranges, vapour species identified in the equilibrium vapours and thermodynamic properties obtained in the study are reported. Important features of these studies are briefly discussed as well.Most of the vaporization studies by Knudsen effusion mass spectrometry carried out on alloys, oxides and fullerenes aimed at the determination of thermodynamic data of gaseous species and condensed phases. Many of the studied materials are of practical importance for modern technologies. The investigations should give information on thermal stability, volatility under different conditions (temperature, oxygen partial pressure, and gaseous impurities), oxidation resistance, reactivity etc.

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Thermodynamic Reassessment of BaO‐YO _1.2 System

Chongmao¹,

Hu²,

Chen³

et al. 2015

TMS2015 Supplemental Proceedings

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Thermodynamics and (p,T,x) phase diagram of (barium oxide + diyttrium trioxide)

Cited by 7 publications

References 5 publications

Effect of CO₂ Exposure on the Chemical Stability and Mechanical Properties of BaZrO₃‐Ceramics

Effect of CO₂ Exposure on the Chemical Stability and Mechanical Properties of BaZrO₃‐Ceramics

Twenty Years of Knudsen Effusion Mass Spectrometry: Studies Performed in the Period 1990-2010

Thermodynamic Reassessment of BaO‐YO _1.2 System

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Thermodynamics and (p,T,x) phase diagram of (barium oxide + diyttrium trioxide)

Cited by 7 publications

References 5 publications

Effect of CO2 Exposure on the Chemical Stability and Mechanical Properties of BaZrO3‐Ceramics

Effect of CO2 Exposure on the Chemical Stability and Mechanical Properties of BaZrO3‐Ceramics

Twenty Years of Knudsen Effusion Mass Spectrometry: Studies Performed in the Period 1990-2010

Thermodynamic Reassessment of BaO‐YO 1.2 System

Contact Info

Product

Resources

About

Effect of CO₂ Exposure on the Chemical Stability and Mechanical Properties of BaZrO₃‐Ceramics

Effect of CO₂ Exposure on the Chemical Stability and Mechanical Properties of BaZrO₃‐Ceramics

Thermodynamic Reassessment of BaO‐YO _1.2 System