Specific trends in phosphate glass crystallization

Rocherullé, Jean; Cai, Muzhi; Bénard-Rocherullé, Patricia; Lebullenger, Ronan; Calvez, Laurent; Troles, Johann; Coq, David Le; Zhang, Xianghua; Massera, Jonathan; Petit, Laëticia

doi:10.1016/j.jnoncrysol.2020.120431

Cited by 5 publications

(2 citation statements)

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“…When studying a similar glass [LiGe(PO 4 ) 3 ], Rocherulléet al found that the nucleation rate was high just after T g and then quickly decreased. 35 This suggests that as the thermal treatment temperature gets closer to T g , the nucleation rate takes over the crystalline growth mechanism. This leads to smaller crystallites.…”

Section: Introductionmentioning

confidence: 99%

“…So, depending on the nucleation rate at the treatment temperature, the microstructure can be completely different, altering the density or the conductivity. When studying a similar glass [LiGe(PO 4 ) 3 ], Rocherullé et al found that the nucleation rate was high just after T g and then quickly decreased . This suggests that as the thermal treatment temperature gets closer to T g , the nucleation rate takes over the crystalline growth mechanism.…”

Section: Introductionmentioning

confidence: 99%

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Concurrent Crystallization Mechanism Leading to Low Temperature Percolation of LAGP Glass-Ceramic Electrolyte

Bertrand,

Rousselot,

Rioux

et al. 2024

ACS Appl. Mater. Interfaces

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Sintering of ceramic electrolytes (CE) is the most efficient way to obtain a dense, all ceramic solid-state battery with oxide-based materials. However, the high temperature required for this process leads to detrimental reactivity between CE and the active material. Crystalline ceramics are necessary for highly conductive oxide materials. Still, thermomechanical properties of glass-phase materials can be used to obtain a denser and more conductive CE. Glass-phase CE can be produced with Nasicontype CE. Here, Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) glass is used as a model to investigate the formability, densification, and conduction properties upon crystallization. A complete study of the crystallization mechanism is first performed to fully understand how a high conductivity of 6.3 × 10 −5 S•cm −1 at 30 °C with 92% relative density is obtained at a sintering temperature of only 550 °C without pressure. This is approximately 200 °C below the usual sintering temperature of LAGP. X-ray diffraction is then used to calculate the amount of crystalline phase as a function of time. A combined study of reaction kinetics and conductivity evolution reveals an autocatalytic nucleation effect, which produces an early crystallization pathway. Density is studied to quantify the ability of the glass to flow during the crystallization process.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%