Structural relaxation of ferroelectric phase in hard sodium lithium niobate solid solutions studied by solid-state NMR
Abstract Hard sodium lithium niobate (LNN) solid solutions offer a promising environmentally benign alternative to lead-based ferroelectric materials for electronic devices. A major challenge in their practical application is that their ferroelectric phase relaxes over a timescale ranging from weeks...
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Nature Portfolio
2025-08-01
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| Online Access: | https://doi.org/10.1038/s41598-025-15554-z |
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| author | Millena Logrado Changhao Zhao Hergen Breitzke Jürgen Rödel Gerd Buntkowsky |
| author_facet | Millena Logrado Changhao Zhao Hergen Breitzke Jürgen Rödel Gerd Buntkowsky |
| author_sort | Millena Logrado |
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| description | Abstract Hard sodium lithium niobate (LNN) solid solutions offer a promising environmentally benign alternative to lead-based ferroelectric materials for electronic devices. A major challenge in their practical application is that their ferroelectric phase relaxes over a timescale ranging from weeks to years to an orthorhombic phase, limiting their long-term performance. In order to understand the structural changes in the relaxation process, high mechanical quality factor Li x Na1−x NbO3 solid-solutions were deliberately stored under ambient conditions for 24 months, without any specialized hermetic protection, to assess their stability over time. We utilized 1D and 2D 23Na solid-state Nuclear Magnetic Resonance (ssNMR) to investigate short-range structural changes in the 24-months-old aged and unaged Li x Na1−x NbO3 solid-solutions. NMR results reveal a system with phase-changes as a function of aging time and temperature. The samples exhibit a multiphase structure compromised of crystalline R and Q orthorhombic domains, along with two types of amorphous regions. A significant amount of ferroelectric phase persists in the ceramics after 24 months of exposure to ambient conditions. A structural model based on short-range order of sodium was suggested and agrees well with the lattice parameter of the freshly prepared samples. |
| format | Article |
| id | doaj-art-942e2d1193a0461cb584cc07cb03cc65 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-08-01 |
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| spelling | doaj-art-942e2d1193a0461cb584cc07cb03cc652025-08-24T11:19:14ZengNature PortfolioScientific Reports2045-23222025-08-011511910.1038/s41598-025-15554-zStructural relaxation of ferroelectric phase in hard sodium lithium niobate solid solutions studied by solid-state NMRMillena Logrado0Changhao Zhao1Hergen Breitzke2Jürgen Rödel3Gerd Buntkowsky4Department of Chemistry, Eduard-Zintl Institute for Inorganic and Physical Chemistry, Technical University of DarmstadtState Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong UniversityDepartment of Chemistry, Eduard-Zintl Institute for Inorganic and Physical Chemistry, Technical University of DarmstadtDivision of Nonmetallic-Inorganic Materials, Department of Materials and Earth Sciences, Technical University of DarmstadtDepartment of Chemistry, Eduard-Zintl Institute for Inorganic and Physical Chemistry, Technical University of DarmstadtAbstract Hard sodium lithium niobate (LNN) solid solutions offer a promising environmentally benign alternative to lead-based ferroelectric materials for electronic devices. A major challenge in their practical application is that their ferroelectric phase relaxes over a timescale ranging from weeks to years to an orthorhombic phase, limiting their long-term performance. In order to understand the structural changes in the relaxation process, high mechanical quality factor Li x Na1−x NbO3 solid-solutions were deliberately stored under ambient conditions for 24 months, without any specialized hermetic protection, to assess their stability over time. We utilized 1D and 2D 23Na solid-state Nuclear Magnetic Resonance (ssNMR) to investigate short-range structural changes in the 24-months-old aged and unaged Li x Na1−x NbO3 solid-solutions. NMR results reveal a system with phase-changes as a function of aging time and temperature. The samples exhibit a multiphase structure compromised of crystalline R and Q orthorhombic domains, along with two types of amorphous regions. A significant amount of ferroelectric phase persists in the ceramics after 24 months of exposure to ambient conditions. A structural model based on short-range order of sodium was suggested and agrees well with the lattice parameter of the freshly prepared samples.https://doi.org/10.1038/s41598-025-15554-zPrecipitatesLNNNMRLiNbO3 |
| spellingShingle | Millena Logrado Changhao Zhao Hergen Breitzke Jürgen Rödel Gerd Buntkowsky Structural relaxation of ferroelectric phase in hard sodium lithium niobate solid solutions studied by solid-state NMR Scientific Reports Precipitates LNN NMR LiNbO3 |
| title | Structural relaxation of ferroelectric phase in hard sodium lithium niobate solid solutions studied by solid-state NMR |
| title_full | Structural relaxation of ferroelectric phase in hard sodium lithium niobate solid solutions studied by solid-state NMR |
| title_fullStr | Structural relaxation of ferroelectric phase in hard sodium lithium niobate solid solutions studied by solid-state NMR |
| title_full_unstemmed | Structural relaxation of ferroelectric phase in hard sodium lithium niobate solid solutions studied by solid-state NMR |
| title_short | Structural relaxation of ferroelectric phase in hard sodium lithium niobate solid solutions studied by solid-state NMR |
| title_sort | structural relaxation of ferroelectric phase in hard sodium lithium niobate solid solutions studied by solid state nmr |
| topic | Precipitates LNN NMR LiNbO3 |
| url | https://doi.org/10.1038/s41598-025-15554-z |
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