Impact of sintering conditions and zirconia addition on flexural strength and ion conductivity of Na-β”-alumina ceramics

Bay, Marie‐Claude; Heinz, Meike V.F.; Linte, Cristina; German, Alexander; Blugan, Gurdial; Battaglia, Corsin; Vogt, Ulrich

doi:10.1016/j.mtcomm.2020.101118

Cited by 5 publications

(5 citation statements)

References 20 publications

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“…This result is in line with the study from Bay et al. for different volume percentages of 3YSZ in the specimens, in which the activation energy was constant for samples with and without 3YSZ in a temperature range from 280 °C to 320 °C [99] . A study from Li et al.…”

Section: Recent Progress In Fabrication and Doping Methods Of Sodium‐beta Aluminasupporting

confidence: 91%

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From High‐ to Low‐Temperature: The Revival of Sodium‐Beta Alumina for Sodium Solid‐State Batteries

Fertig

Skadell

Schulz

et al. 2021

Batteries & Supercaps

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Sodium‐based batteries are promising post lithium‐ion technologies because sodium offers a specific capacity of 1166 mAh g−1 and a potential of −2.71 V vs. the standard hydrogen electrode. The solid electrolyte sodium‐beta alumina shows a unique combination of properties because it exhibits high ionic conductivity, as well as mechanical stability and chemical stability against sodium. Pairing a sodium negative electrode and sodium‐beta alumina with Na‐ion type positive electrodes, therefore, results in a promising solid‐state cell concept. This review highlights the opportunities and challenges of using sodium‐beta alumina in batteries operating from medium‐ to low‐temperatures (200 °C–20 °C). Firstly, the recent progress in sodium‐beta alumina fabrication and doping methods are summarized. We discuss strategies for modifying the interfaces between sodium‐beta alumina and both the positive and negative electrodes. Secondly, recent achievements in designing full cells with sodium‐beta alumina are summarized and compared. The review concludes with an outlook on future research directions. Overall, this review shows the promising prospects of using sodium‐beta alumina for the development of solid‐state batteries.

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Section: Recent Progress In Fabrication and Doping Methods Of Sodium‐beta Aluminasupporting

confidence: 91%

“…showed that the 3YSZ addition decreased the liquid phase formation temperature by 60 °C due to its impact on the grain boundary composition. 5 vol % 3YSZ decreased the ionic conductivity while increasing the flexural strength [99] . Unfortunately, Li et al.…”

Section: Recent Progress In Fabrication and Doping Methods Of Sodium‐beta Aluminamentioning

confidence: 94%

From High‐ to Low‐Temperature: The Revival of Sodium‐Beta Alumina for Sodium Solid‐State Batteries

Fertig

Skadell

Schulz

et al. 2021

Batteries & Supercaps

View full text Add to dashboard Cite

show abstract

“…No isolated transformed zone, but rather homogeneous defective layers were found under the surfaces of 4Y110 for 4Y subgroups and of 5Y90 for 5Y subgroups. Abnormal grain growth was observed in 5Y125, which may compromise the mechanical stability [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

Phase Transformations and Subsurface Changes in Three Dental Zirconia Grades after Sandblasting with Various Al2O3 Particle Sizes

et al. 2021

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Although sandblasting is mainly used to improve bonding between dental zirconia and resin cement, the details on the in-depth damages are limited. The aim of this study was to evaluate phase transformations and subsurface changes after sandblasting in three different dental zirconia (3, 4, and 5 mol% yttria-stabilized zirconia; 3Y-TZP, 4Y-PSZ, and 5Y-PSZ). Zirconia specimens (14.0 × 14.0 × 1.0 mm3) were sandblasted using different alumina particle sizes (25, 50, 90, 110, and 125 µm) under 0.2 MPa for 10 s/cm2. Phase transformations and residual stresses were investigated using X-ray diffraction and the Williamson-Hall method. Subsurface damages were evaluated with cross-sections by a focused ion beam. Stress field during sandblasting was simulated by the finite element method. The subsurface changes after sandblasting were the emergence of a rhombohedral phase, micro/macro cracks, and compressive/tensile stresses depending on the interactions between blasting particles and zirconia substrates. 3Y-TZP blasted with 110-µm particles induced the deepest transformed layer with the largest compressive stress. The cracks propagated parallel to the surface with larger particles, being located up to 4.5 µm under the surface in 4Y- or 5Y-PSZ subgroups. The recommended sandblasting particles were 110 µm for 3Y-TZP and 50 µm for 4Y-PSZ or 5Y-PSZ for compressive stress-induced phase transformations without significant subsurface damages.

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“…[6] These strongly bonded alumina layers are responsible for the excellent thermal and chemical stability of the sintered bulk ceramics, but they also require unusually high sintering temperatures (typically ≥ 1600°C) in order for the densification process to proceed. [7] These notably high sintering temperatures introduce a number of issues in the processing of SBA, including but not limited to: (1) loss of sodium due to volatilization, (2) thermally induced phase transformation from the β''-phase to the less conductive β'-phase (SBA') [8]- [10], and (3) abnormal/excessive grain growth during prolonged dwell times at peak sintering temperatures, resulting in poor mechanical properties in the final polycrystalline ceramics [11]. SBA thus illustrates an unfortunately common dichotomy in solid-state ionic conductors; their structures are characterized by both light, mobile, ions (e.g.…”

Section: Introductionmentioning

confidence: 99%

A dramatic reduction in the sintering temperature of the refractory sodium β′′-alumina solid electrolyte via cold sintering

2021

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Impact of sintering conditions and zirconia addition on flexural strength and ion conductivity of Na-β”-alumina ceramics

Cited by 5 publications

References 20 publications

From High‐ to Low‐Temperature: The Revival of Sodium‐Beta Alumina for Sodium Solid‐State Batteries

From High‐ to Low‐Temperature: The Revival of Sodium‐Beta Alumina for Sodium Solid‐State Batteries

Phase Transformations and Subsurface Changes in Three Dental Zirconia Grades after Sandblasting with Various Al2O3 Particle Sizes

A dramatic reduction in the sintering temperature of the refractory sodium β′′-alumina solid electrolyte via cold sintering

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