Transparent glass-ceramics functionalized by dispersed crystals

Liu, Xiaofeng; Zhang, Jiajia; Zhou, Shifeng; Yue, Yuanzheng; Qiu, Jianrong

doi:10.1016/j.pmatsci.2018.02.006

Cited by 257 publications

(130 citation statements)

References 370 publications

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“…[16] Notably, the crystallinity of sample Bi16.5 (≈97%) is about 7 times larger than that of Bi12.5 (≈14%). [21] Taken together, above results unambiguously suggest the rational elemental hybridization approach is quite effective for regulating the crystallization habit of glass phase. In stark contrast, the extremely dense and tiny particles are homogeneously precipitated in sample Bi16.5 and the size of particles can be tuned down to 20 nm ( Figure 3g).…”

Section: The Crystallization Behavior Of Glasssupporting

confidence: 52%

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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Section: The Crystallization Behavior Of Glasssupporting

confidence: 52%

Pressureless Crystallization of Glass for Transparent Nanoceramics

et al. 2019

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“…However, direct precipitation of phosphor nanocrystals within the bulk glass matrix rely on the elaborate choice of the glass composition and the thermal treatment conditions. Up to the present, GCs based on numerous oxides and non‐oxides parent glasses have been fabrication by direct precipitation of crystals using thermal treatment . Of particular interest is the potential applications of rare earth (RE) ions (like Eu 3+ ) or transition metal (TM) ions (ie, Mn 2+ )‐doped GCs are their emission performance which is drastically enhanced after crystallization .…”

Section: Introductionmentioning

confidence: 99%

Surface crystallized Mn‐doped glass‐ceramics for tunable luminescence

2019

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Monolithic luminescent glass‐ceramic is highly desirable for solid‐state lighting as it is stable and robust, while in practical light‐emitting devices only a thin luminescent layer is used for more efficient excitation and light extraction. In this paper, Mn2+‐doped glass and glass‐ceramic with the composition of 60SiO2‐8Na2O–20ZnO–12Ga2O3 were fabricated by the conventional melt‐quenching technique. We observe that the crystallization of α‐Zn2SiO4 nanocrystals takes place on the glass surface with controllable thickness after heat treatment. The glass samples show typical red emission peaking at λ = 620 nm that can be ascribed to the spin‐forbidden 4T1g(G) → 6A1g(S) transition of Mn2+ (d5) located in the octahedral coordination site of the glass host. After surface crystallization this red emission is retained and a new green emission at 528 nm is observed through the control of the crystallization temperature and duration, thus offering tunable emission characteristics promising for the lighting application. This change in the visible emission is interpreted in terms of the change of coordination state of Mn2+ from octahedral in a glass matrix to tetrahedral in the surface precipitated α‐Zn2SiO4 crystals.

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“…On the basis of the crystal field theory, Ni 2+ dopant potentially shows broadband emission in the NIR region. The broadband emission of Ni 2+ ions in oxide and oxyfluoride glass systems has been widely studied, and the broadband NIR luminescence has been experimentally demonstrated . Oxyfluoride glass‐ceramics are attractive because the low phonon energy of oxyfluoride crystals in glass usually leads to the low nonradiative relaxation rate of active ions.…”

Section: Introductionmentioning

confidence: 99%

Crystallization control in Ni²⁺‐doped glass‐ceramics for broadband near‐infrared luminesce

2019

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The research of doped photonic glass has recently attracted much attention owning to the significant applications in various fields, including lasers, photovoltaics, and optical amplification. In this work, we present the design, fabrication, and experimental implementation of a novel fluorosilicate photonic glass‐ceramics with broadband luminescence. We demonstrate that precipitated nanocrystals can be tuned by changing the heat‐treatment temperature. This proposal offers an excellent opportunity for controlling the local environment around Ni2+ dopant. Consequently, the broadband and flat emission covering a waveband from 1200 to 2400 nm with a bandwidth of 605 nm can be realized. The possible physical mechanism, which can be attributed to the gradual change of nanocrystals from K2SiF6 to KCdF3 with the enhancement of the heat‐treatment temperature, is also discussed.

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Transparent glass-ceramics functionalized by dispersed crystals

Cited by 257 publications

References 370 publications

Pressureless Crystallization of Glass for Transparent Nanoceramics

Pressureless Crystallization of Glass for Transparent Nanoceramics

Surface crystallized Mn‐doped glass‐ceramics for tunable luminescence

Crystallization control in Ni²⁺‐doped glass‐ceramics for broadband near‐infrared luminesce

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Transparent glass-ceramics functionalized by dispersed crystals

Cited by 257 publications

References 370 publications

Pressureless Crystallization of Glass for Transparent Nanoceramics

Pressureless Crystallization of Glass for Transparent Nanoceramics

Surface crystallized Mn‐doped glass‐ceramics for tunable luminescence

Crystallization control in Ni2+‐doped glass‐ceramics for broadband near‐infrared luminesce

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Crystallization control in Ni²⁺‐doped glass‐ceramics for broadband near‐infrared luminesce