Tuning the melting point and phase stability of rare-earth oxides to facilitate their crystal growth from the melt
Abstract The challenge of growing rare-earth (RE) sesquioxide crystals can be overcome by tailoring their structural stability and melting point via composition engineering. This work contributes to the advancement of the field of crystal growth of high-entropy oxides. A compound with only small REs...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2022-08-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://doi.org/10.1007/s40145-022-0625-z |
| _version_ | 1797759832988581888 |
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| author | Matheus Pianassola Kaden L. Anderson Joshua Safin Can Agca Jake W. McMurray Bryan C. Chakoumakos Jöerg C. Neuefeind Charles L. Melcher Mariya Zhuravleva |
| author_facet | Matheus Pianassola Kaden L. Anderson Joshua Safin Can Agca Jake W. McMurray Bryan C. Chakoumakos Jöerg C. Neuefeind Charles L. Melcher Mariya Zhuravleva |
| author_sort | Matheus Pianassola |
| collection | DOAJ |
| description | Abstract The challenge of growing rare-earth (RE) sesquioxide crystals can be overcome by tailoring their structural stability and melting point via composition engineering. This work contributes to the advancement of the field of crystal growth of high-entropy oxides. A compound with only small REs (Lu,Y,Ho,Yb,Er)2O3 maintains a cubic C-type structure upon cooling from the melt, as observed via in-situ high-temperature neutron diffraction on aerodynamically levitated samples. On the other hand, a compound with a mixture of small and large REs (Lu,Y,Ho,Nd,La)2O3 crystallizes as a mixture of a primary C-type phase with an unstable secondary phase. Crystals of compositions (Lu,Y,Ho,Nd,La)2O3 and (Lu,Y,Gd,Nd,La)2O3 were grown by the micro-pulling-down (mPD) method with a single monoclinic B-type phase, while a powder of (Lu,Y,Ho,Yb,Er)2O3 did not melt at the maximum operating temperature of an iridium-rhenium crucible. The minimization of the melting point of the two grown crystals is attributed to the mismatch in cation sizes. The electron probe microanalysis reveals that the general element segregation behavior in the crystals depends on the composition. |
| first_indexed | 2024-03-12T18:50:08Z |
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| id | doaj.art-f15d4822171a4b8883c4e1ebb24707e4 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-12T18:50:08Z |
| publishDate | 2022-08-01 |
| publisher | Tsinghua University Press |
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| series | Journal of Advanced Ceramics |
| spelling | doaj.art-f15d4822171a4b8883c4e1ebb24707e42023-08-02T07:19:59ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082022-08-011191479149010.1007/s40145-022-0625-zTuning the melting point and phase stability of rare-earth oxides to facilitate their crystal growth from the meltMatheus Pianassola0Kaden L. Anderson1Joshua Safin2Can Agca3Jake W. McMurray4Bryan C. Chakoumakos5Jöerg C. Neuefeind6Charles L. Melcher7Mariya Zhuravleva8Scintillation Materials Research Center, The University of TennesseeScintillation Materials Research Center, The University of TennesseeDepartment of Materials Science and Engineering, The University of TennesseeMaterials Science and Technology Division, Oak Ridge National LaboratoryMaterials Science and Technology Division, Oak Ridge National LaboratoryNeutron Scattering Division, Oak Ridge National LaboratoryNeutron Scattering Division, Oak Ridge National LaboratoryScintillation Materials Research Center, The University of TennesseeScintillation Materials Research Center, The University of TennesseeAbstract The challenge of growing rare-earth (RE) sesquioxide crystals can be overcome by tailoring their structural stability and melting point via composition engineering. This work contributes to the advancement of the field of crystal growth of high-entropy oxides. A compound with only small REs (Lu,Y,Ho,Yb,Er)2O3 maintains a cubic C-type structure upon cooling from the melt, as observed via in-situ high-temperature neutron diffraction on aerodynamically levitated samples. On the other hand, a compound with a mixture of small and large REs (Lu,Y,Ho,Nd,La)2O3 crystallizes as a mixture of a primary C-type phase with an unstable secondary phase. Crystals of compositions (Lu,Y,Ho,Nd,La)2O3 and (Lu,Y,Gd,Nd,La)2O3 were grown by the micro-pulling-down (mPD) method with a single monoclinic B-type phase, while a powder of (Lu,Y,Ho,Yb,Er)2O3 did not melt at the maximum operating temperature of an iridium-rhenium crucible. The minimization of the melting point of the two grown crystals is attributed to the mismatch in cation sizes. The electron probe microanalysis reveals that the general element segregation behavior in the crystals depends on the composition.https://doi.org/10.1007/s40145-022-0625-zhigh-entropy oxidescrystallographyneutron diffractioncrystal growth |
| spellingShingle | Matheus Pianassola Kaden L. Anderson Joshua Safin Can Agca Jake W. McMurray Bryan C. Chakoumakos Jöerg C. Neuefeind Charles L. Melcher Mariya Zhuravleva Tuning the melting point and phase stability of rare-earth oxides to facilitate their crystal growth from the melt Journal of Advanced Ceramics high-entropy oxides crystallography neutron diffraction crystal growth |
| title | Tuning the melting point and phase stability of rare-earth oxides to facilitate their crystal growth from the melt |
| title_full | Tuning the melting point and phase stability of rare-earth oxides to facilitate their crystal growth from the melt |
| title_fullStr | Tuning the melting point and phase stability of rare-earth oxides to facilitate their crystal growth from the melt |
| title_full_unstemmed | Tuning the melting point and phase stability of rare-earth oxides to facilitate their crystal growth from the melt |
| title_short | Tuning the melting point and phase stability of rare-earth oxides to facilitate their crystal growth from the melt |
| title_sort | tuning the melting point and phase stability of rare earth oxides to facilitate their crystal growth from the melt |
| topic | high-entropy oxides crystallography neutron diffraction crystal growth |
| url | https://doi.org/10.1007/s40145-022-0625-z |
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