Structural evolution of BaCe0.65Zr0.20Y0.15O3-δ-Ce0.85Gd0.15O2-δ composite MPEC membrane by in-situ synchrotron XRD analyses

Mortalò, Cecilia; Santoru, Antonio; Pistidda, Claudio; Rebollo, Elena; Boaro, Marta; Leonelli, Cristina; Fabrizio, M.

doi:10.1016/j.mtener.2019.06.004

Cited by 8 publications

(16 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…X-ray diffractograms of the samples at RT are shown in Figure S2. The obtained profiles confirmed our previous results; 38 GDC crystallizes in a cubic phase (Fm3m), while BCZY shows an orthorhombic symmetry (Imma). BCZY diffractogram also showed small peaks at 34, 48, and 57 2θ degrees, which were attributed to the presence of a small impurity of Y 2 O 3 in the material.…”

Section: Resultssupporting

confidence: 90%

“…These results well agree with previous observations collected at the synchrotron Petra III (DESY Synchrotron, Hamburg). 38 Table 1 shows the results of Rietveld refinement of some representative diffractograms proving that the transitions were reversible and independent on the treatment atmosphere (see also Figure S4). BCZY peaks were also observed to shift to lower 2θ angles by increasing the temperature up to 550 °C.…”

Section: Resultsmentioning

confidence: 92%

“…Moreover, complete reversibility of the thermal behavior of BCZY−GDC was observed, which can be associated with high stability of the composite. 38 3.2. Raman Analysis.…”

Section: Resultsmentioning

confidence: 99%

“…This induces thermal expansion of the individual components in favor of greater reciprocal compatibility to thermomechanical stress. 38 The redox flexibility and thermomechanical properties of this material would allow contrasting the strains induced by the expansion of ceria lattice in reducing conditions, especially when applied as a structured component in devices such as fuel cells and membranes.…”

Section: Resultsmentioning

confidence: 99%

“…cubic a = 4.3847(1) 84.296(1) 50 H 2 /N 2 orthorhombic a = 6.1562(2), b = 6.1786(2), c = 8.6785(2) 82.53(17) 50 air orthorhombic a = 6.1566(2), b = 6.1786(2), c = 8.6785(2) 82.53(17) 500 air cubic a = 4.3742(1) 83.692(3) 750 air cubic nd b nd 50 air orthorhombic a = 6.1555(2), b = 6.1768(2), c = 8.6810(2) 82.51(57) a Sequence of treatment: (i) ramp in H 2 (4.58%)/N 2 starting from 50 to 750 °C and then back to 50 °C; (ii) treatment in air at 500 °C; and (iii) ramp in the air from 50 to 750 °C and then back to 50 °C. bWe limited the oxidation ramp for BCZY up to 500 °C since the previous studies did not show significant structural changes above this temperature 38. …”

mentioning

confidence: 99%

See 4 more Smart Citations

Insights on the Interfacial Processes Involved in the Mechanical and Redox Stability of the BaCe_0.65Zr_0.20Y_0.15O_3−δ–Ce_0.85Gd_0.15O_2−δ Composite

Mortalò

Boaro

Rebollo

et al. 2020

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

Ceramic fuel cells and H 2 permeation membranes are key technologies to accelerate the transition from a carbon economy based on fossil fuels to a H 2 economy based on the use of renewable resources. The competitiveness of these technologies in the market depends on the identification and optimization of stable and effective low-cost materials. Perovskite−fluorite ceria-based composites show suitable properties, and studies on the mechanism that rules their mechanical, thermal, and redox stability are crucial for further technological advances. This study focuses on the redox behavior of BaCe 0.65 Zr 0.20 Y 0.15 O 3−δ −Ce 0.85 Gd 0.15 O 2−δ (BCZY−GDC) dual-phase ceramic. Temperature-programmed reduction, thermogravimetry, temperature-dependent X-ray diffraction, and Raman analyses are used to understand the dynamics of the interaction between the ceramic oxide components. It is shown how the simultaneous occurrence of structural changes in BCZY and GDC reduction helps in decreasing the mechanical stresses induced by temperature and by the reducing atmosphere. The interfacial processes between the single GDC and BCZY oxides contribute to limit reduction of GDC in the composite, which allows complete reversibility of the redox process investigated in this study. Thus, it is suggested that the redox behavior of this class of materials may be a descriptor of their mechanical and thermal stability.

show abstract

Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 92%

“…Moreover, complete reversibility of the thermal behavior of BCZY−GDC was observed, which can be associated with high stability of the composite. 38 3.2. Raman Analysis.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Insights on the Interfacial Processes Involved in the Mechanical and Redox Stability of the BaCe_0.65Zr_0.20Y_0.15O_3−δ–Ce_0.85Gd_0.15O_2−δ Composite

Mortalò

Boaro

Rebollo

et al. 2020

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

The effect of strain induced phase transformation on the thermal expansion compatibility of plasma sprayed spinel coating on SOFC metallic interconnect – A study using in-situ high temperature X-ray diffraction

Manjunath

Santhy

Rajasekaran

2023

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Mechanical properties of BaCe0.65Zr0.2Y0.15O3- proton-conducting material determined using different nanoindentation methods

Zhou

Malzbender

Zeng

et al. 2020

Journal of the European Ceramic Society

View full text Add to dashboard Cite

Structural evolution of BaCe0.65Zr0.20Y0.15O3-δ-Ce0.85Gd0.15O2-δ composite MPEC membrane by in-situ synchrotron XRD analyses

Cited by 8 publications

References 48 publications

Insights on the Interfacial Processes Involved in the Mechanical and Redox Stability of the BaCe_0.65Zr_0.20Y_0.15O_3−δ–Ce_0.85Gd_0.15O_2−δ Composite

Insights on the Interfacial Processes Involved in the Mechanical and Redox Stability of the BaCe_0.65Zr_0.20Y_0.15O_3−δ–Ce_0.85Gd_0.15O_2−δ Composite

The effect of strain induced phase transformation on the thermal expansion compatibility of plasma sprayed spinel coating on SOFC metallic interconnect – A study using in-situ high temperature X-ray diffraction

Mechanical properties of BaCe0.65Zr0.2Y0.15O3- proton-conducting material determined using different nanoindentation methods

Contact Info

Product

Resources

About

Structural evolution of BaCe0.65Zr0.20Y0.15O3-δ-Ce0.85Gd0.15O2-δ composite MPEC membrane by in-situ synchrotron XRD analyses

Cited by 8 publications

References 48 publications

Insights on the Interfacial Processes Involved in the Mechanical and Redox Stability of the BaCe0.65Zr0.20Y0.15O3−δ–Ce0.85Gd0.15O2−δ Composite

Insights on the Interfacial Processes Involved in the Mechanical and Redox Stability of the BaCe0.65Zr0.20Y0.15O3−δ–Ce0.85Gd0.15O2−δ Composite

The effect of strain induced phase transformation on the thermal expansion compatibility of plasma sprayed spinel coating on SOFC metallic interconnect – A study using in-situ high temperature X-ray diffraction

Mechanical properties of BaCe0.65Zr0.2Y0.15O3- proton-conducting material determined using different nanoindentation methods

Contact Info

Product

Resources

About

Insights on the Interfacial Processes Involved in the Mechanical and Redox Stability of the BaCe_0.65Zr_0.20Y_0.15O_3−δ–Ce_0.85Gd_0.15O_2−δ Composite

Insights on the Interfacial Processes Involved in the Mechanical and Redox Stability of the BaCe_0.65Zr_0.20Y_0.15O_3−δ–Ce_0.85Gd_0.15O_2−δ Composite