ISIS Neutron and Muon Source Data Journal

Understanding Chemical Expansion in Perovskite Oxides: Impact of Long-Range Defect Ordering

Abstract: "Chemical expansion" occurs when some ceramics expand upon releasing oxygen. Their ability to effectively "breathe" oxygen makes them of use in sustainable energy conversion/storage devices like solid oxide cells. However, chemical expansion during use causes cracks in these brittle materials, a problem for durability. Therefore chemical expansion must be better understood so that materials with minimal chemical expansion can be designed. In this work neutron diffraction will be applied in realistic operating conditions to perovskite-structured oxides to investigate how a particular structural aspect (long-range oxygen ordering) impacts the chemical expansion behavior. Lattice expansion, changes in atomic positions, and oxygen content during oxygen loss will be monitored and compared to prior simulations and overall (bulk) expansion measurements when oxygen is ordered vs. disordered.

Principal Investigator: Professor Nicola Perry
Experimenter: Mr Po-Chen Shih
Experimenter: Dr Ainara Aguadero
Experimenter: Mr Mudasir Yatoo
Local Contact: Dr Alexandra Gibbs
Experimenter: Professor Stephen Skinner
Experimenter: Mr Chen-Yu Tsai

DOI: 10.5286/ISIS.E.RB1610158

ISIS Experiment Number: RB1610158

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Nicola Perry et al; (2016): Understanding Chemical Expansion in Perovskite Oxides: Impact of Long-Range Defect Ordering, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1610158

Data is released under the CC-BY-4.0 license.