Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

Ma, Xiuhua; Li, Xiaoyü; Li, Jianqiang; Genevois, Cécile; Ma, Bin; Etienne, Auriane; Wan, Chunlei; Véron, Emmanuel; Peng, Zhijian; Allix, Mathieu

doi:10.1038/s41467-018-03467-7

Cited by 140 publications

(124 citation statements)

References 65 publications

(77 reference statements)

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“…Nanoscale grain size is poised to have unprecedented optical and mechanical properties . The grain size of the YAG:Ce ceramic can also be tuned from the micro‐ to nanoscale to achieve a better optical performance.…”

Section: Survey Of Laser Phosphorsmentioning

confidence: 99%

Color Conversion Materials for High‐Brightness Laser‐Driven Solid‐State Lighting

Wang

Hirosaki

et al. 2018

Laser & Photonics Reviews

261

188

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Solid‐state lighting is advancing toward higher power, higher brightness, and smaller size to cope with the market competitiveness, and laser‐driven solid‐state lighting technology is springing up owing to its super‐high brightness and compactness. These developments put forward new requirements for color conversion materials (i.e., phosphors). Here, the state‐of‐art achievements in laser phosphors are summarized, and the topics of luminescence saturation, light extraction efficiency, and light uniformity encountered in laser lighting technology are discussed. Several typical types of color converters, such as single crystal, phosphor ceramics, phosphor‐in‐glass, phosphor films, and quantum‐well light‐emitting diodes, are comparatively overviewed and discussed. The cutting‐edge applications of high‐brightness white laser light in lighting, displays, healthcare, and communications are summarized. The challenges and outlook in laser‐driven solid‐state lighting and some empirical rules for designing novel laser phosphors are highlighted.

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Section: Survey Of Laser Phosphorsmentioning

confidence: 99%

Color Conversion Materials for High‐Brightness Laser‐Driven Solid‐State Lighting

Wang

Hirosaki

et al. 2018

Laser & Photonics Reviews

261

188

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“…

interest in a wide range of applications, including missile guidance, infrared night vision, and laser and nuclear radiation detection. [6][7][8] Alternatively, more extreme synthesis techniques, including superhigh pressure, spark plasma sintering, and containerless processing may shift the grains toward submicrometer region; [9][10][11][12][13] however, the methods are inherently not scalable and also strictly limit the available sample size. Despite substantial progress in ceramic technology, it has been challenging to prepare this type of unique transparent nanoceramics with nanosized grains.

…”

mentioning

confidence: 99%

Pressureless Crystallization of Glass for Transparent Nanoceramics

et al. 2019

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Transparent nanoceramics embedded with highly dense crystalline domains are promising for applications in missile guidance, infrared night vision, and laser and nuclear radiation detection. Unfortunately, current nanoceramics are strictly constrained by the stringent construction procedures such as super‐high pressure and containerless processing. Here, a pressureless crystallization engineering strategy in glass for elaboration of transparent nanoceramics and fibers is proposed and experimentally demonstrated. By intentional creation of a sharp contrast between nucleation and growth rates, the crystal growth rate during glass crystallization can be significantly suppressed. Importantly, this unique phase‐transition habit enables the achievement of transparent nanoceramics and even smooth fibers with extremely tiny crystalline size (≈20 nm) and high crystallinity (≈97%) under atmospheric pressure. This allows the generation of an attractive nonlinear optical response such as dynamic optical filtering and luminescence in the mid‐infrared waveband of 4300–4950 nm. These findings highlight that the strategy to switch the phase‐transition habit of glass into the unconventional crystallization regime may provide new opportunities for the creation of next‐generation nanoceramics and fibers.

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“…Nevertheless, thanks to the development of the contactless preparation using the aerodynamic levitation coupled to laser heating (AL-LH) system, we successfully elaborated fully dense ceramics of Ln 1 + x Sr 1-x Ga 3 O 7 + δ (Ln = Eu, Gd, Tb, x = 0.4-0.6) melilite oxide ion conductors using the recent full crystallization from bulk glass approach, initially developed to access new optical materials. [34][35][36][37][38][39][40] The resulting ceramics with micrometer scale crystallites retained some transparence in the visible and near infrared ranges, owing to their full density (no porosity) and limited birefringence effect (Figure 10a-b). [22] During the preparation step using the AL-LH system, the samples are heated up to their melting temperature by two CO 2 lasers whereas aerodynamic levitation of the melted bead (a few milimeters of diameter) is ensured by a gas flow.…”

Section: Glass Crystallization Route To New Melilite Oxide Ion Conducmentioning

confidence: 99%

Development of Melilite‐Type Oxide Ion Conductors

Zhou

Allix

et al. 2020

The Chemical Record

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Lowering the operating temperature of solid oxide fuel cells (SOFCs) requires high performance oxide ion conductor electrolytes. Recently tetrahedra-based structures have been attracting considerable attention for oxide ion conductor development, among which the layered tetrahedral network melilite structure appears particularly interesting owing to its remarkable capability to accommodate and transport interstitial oxide ions, compared with isolated tetrahedral anion structures. Stabilization and migration mechanisms of interstitial oxide ions in melilites have been systematically investigated using local structural relaxation from both electrostatic Coulomb interaction and chemical bonding aspects based on atomic and electronic structures respectively using experimental and theoretical approaches. These reveal cationic size and chemical bonding effects on stabilization and migration mechanisms of interstitial oxide ions. Lately, full crystallization from glass, an innovative synthesis method, was employed to produce new metastable melilite oxide ion conductors which are inaccessible using classic solid state reaction owing to cationic size effect. Finally, the thermal and chemical stability at low temperature and the high oxide ion conductivity of the best melilite oxide ion conductors based on LaSrGa 3 O 7 are likely to provide real possibilities of applications of melilite-type electrolytes in SOFCs and other related devices.

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Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

Cited by 140 publications

References 65 publications

Color Conversion Materials for High‐Brightness Laser‐Driven Solid‐State Lighting

Color Conversion Materials for High‐Brightness Laser‐Driven Solid‐State Lighting

Pressureless Crystallization of Glass for Transparent Nanoceramics

Development of Melilite‐Type Oxide Ion Conductors

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