Transparent fluoride glass-ceramics with phase-selective crystallization for middle IR photonics

Zhang, Longfei; Sun, Yang; Jiang, Yue; Da, Bo; Du, Juan; Wang, Shuaipeng; Qi, Sisheng; Yang, Zhiyong; Zhang, Long; He, Jin

doi:10.1039/d2tc02627a

Cited by 7 publications

(2 citation statements)

References 49 publications

(53 reference statements)

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“…Clusters of niobates centered around various metal cations manifest a heterogeneous spatial distribution in the liquid structure, resulting in a separation between Ba/Nb-rich regions and Ba/Nb-poor regions. 19 Consequently, despite temporal and length-scale constraints, first-principles simulations have already elucidated the existence of phase separation within the molten system of…”

Section: Resultsmentioning

confidence: 99%

“…The atomic structures sampled at temperatures of 2000, 1675, and 300 K were collected separately for subsequent isothermal annealing, as depicted in Figure c–e. Clusters of niobates centered around various metal cations manifest a heterogeneous spatial distribution in the liquid structure, resulting in a separation between Ba/Nb-rich regions and Ba/Nb-poor regions . Consequently, despite temporal and length-scale constraints, first-principles simulations have already elucidated the existence of phase separation within the molten system of P 2 O 5 –K 2 O–BaO–Bi 2 O 3 –TeO 2 –Nb 2 O 5 –Ta 2 O 5 .…”

Section: Resultsmentioning

confidence: 99%

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Engineering Phase Separation in Niobate Glass through Ab Initio Molecular Dynamics for Enhanced Energy Storage Performance and Unprecedented Thermal Stability in Niobate-Based Glass Ceramics

Chen,

Wang,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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The advancement of lead-free glass ceramics (GCs) possessing appropriate energy storage characteristics is crucial for the renewable energy and electronics industry. In this study, we synthesized lead-free GCs predominantly composed of the tungsten bronze phase, Ba 3.3 Nb 10 O 28.3 . Ab initio molecular dynamics initially reveal nonuniform distribution within the Ba/Nb−O regions in niobite glassy melts, offering valuable insights for the subsequent crystallization process. The proposal of a B-site engineering strategy is suggested, which entails the concurrent reduction of grain size and augmentation of the band gap in tungsten bronze GCs doped with Ta. This approach results in a substantial enhancement of the dielectric breakdown strength (BDS). Phase-field simulations have indicated that the refinement of grain sizes plays a pivotal role in augmenting the local electric field distribution and breakdown path, thereby contributing to the enhancement of BDS. As a consequence of these modifications, a notably high recoverable energy density (W rec ) of 5.23 J/cm 3 can be achieved, accompanied by an ultrahigh efficiency (η) of 94%, and superior thermal stability in energy storage. These outcomes are particularly evident in the case of 2 mol % Ta 2 O 5 -doped P 2 O 5 −K 2 O−BaO−Bi 2 O 3 −TeO 2 − Nb 2 O 5 (PKBBTN-T) GCs, where the W rec and η can be determined to be 2.87 ± 3% J/cm 3 and 95.46 ± 4%, respectively, over a temperature range spanning from 20 to 150 °C. Additionally, this specimen exhibits an exceptionally high discharge energy density (W dis ) of 4.01 J/cm 3 . This comprehensive investigation, comprising experimental and theoretical analyses, establishes an effective pathway and paradigm for the development of dielectric materials with ultrahigh energy storage properties.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Engineering Phase Separation in Niobate Glass through Ab Initio Molecular Dynamics for Enhanced Energy Storage Performance and Unprecedented Thermal Stability in Niobate-Based Glass Ceramics

Chen,

Wang,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Efficient energy transfer between Er and Dy achieved in perfluoride glass ceramics by tailoring crystallization characteristics

Hu,

Liu,

Zhao

et al. 2024

Ceramics International

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Johnson-Mehl-Avrami kinetics as a universal description of crystallization in glasses?

Svoboda

2024

Journal of the European Ceramic Society

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Transparent fluoride glass-ceramics with phase-selective crystallization for middle IR photonics

Abstract: Crystallization in glass is a fundamental topic in materials science, yielding the beauty and richness of crystals in glass for broad applications. However, controlling the crystallization in fluoride glasses remains...

Cited by 7 publications

References 49 publications

Engineering Phase Separation in Niobate Glass through Ab Initio Molecular Dynamics for Enhanced Energy Storage Performance and Unprecedented Thermal Stability in Niobate-Based Glass Ceramics

Engineering Phase Separation in Niobate Glass through Ab Initio Molecular Dynamics for Enhanced Energy Storage Performance and Unprecedented Thermal Stability in Niobate-Based Glass Ceramics

Efficient energy transfer between Er and Dy achieved in perfluoride glass ceramics by tailoring crystallization characteristics

Johnson-Mehl-Avrami kinetics as a universal description of crystallization in glasses?

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