Transparent Glass-Ceramics Produced by Sol-Gel: A Suitable Alternative for Photonic Materials

Gorni, Giulio; Velázquez, J. J.; Mosa, Jadra; Balda, Rolindes; Fernández, J.; Durán, Alicia; Castro, Yolanda

doi:10.3390/ma11020212

Cited by 46 publications

(31 citation statements)

References 115 publications

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“…As was presented in Figure 5, the emission spectrum of CaF 2 :Eu 3+ GCs also consisted of the characteristic bands of Eu 3+ ions corresponding to the intra-configurational 5 The photoluminescence decay curve of the 5 D0 state of Eu 3+ ions recorded for fabricated glassceramics was presented in the inset of Figure 5. The decay curve was well-fitted to double-exponential function and therefore, it was distinguished two different decay components: fast (τ1 = 1.63 ms) and slow (τ2 = 12.84 ms).…”

Section: Luminescence Behavior Of Fabricated Sol-gel Materialsmentioning

confidence: 79%

“…Transparent glass-ceramics (GCs) containing fluoride nanocrystals fabricated using high-temperature melt-quenching or low-temperature sol-gel method are suitable modern materials for lasers, optical waveguides, solid-state lighting and numerous photonic applications [1][2][3][4][5]. Depending on chemical composition and technological conditions, nano-or micro-crystals are usually well-formed during temperature-controlled crystallization of precursor glasses or xerogels.…”

Section: Introductionmentioning

confidence: 99%

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Sol-Gel Glass-Ceramic Materials Containing CaF2:Eu3+ Fluoride Nanocrystals for Reddish-Orange Photoluminescence Applications

et al. 2019

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CaF 2 :Eu 3+ glass-ceramic sol-gel materials have been examined for reddish-orange photoluminescence applications. The transformation from precursor xerogels to glass-ceramic materials with dispersed fluoride nanocrystals was verified using several experimental methods: differential scanning calorimetry (DSC), thermogravimetric analysis (TG), X-ray diffraction (XRD), transmission electron microscopy (TEM), infrared spectroscopy (IR-ATR), energy dispersive X-ray spectroscopy (EDS) and photoluminescence measurements. Based on luminescence spectra and their decays, the optical behavior of Eu 3+ ions in fabricated glass-ceramics were characterized and compared to those of precursor xerogels. In particular, the determined luminescence lifetime of the 5 D 0 excited state of Eu 3+ ions in nanocrystalline CaF 2 :Eu 3+ glass-ceramic materials is significantly prolonged in comparison with prepared xerogels. The integrated intensities of emission bands associated to the 5 D 0 → 7 F 2 electric-dipole transition (ED) and the 5 D 0 → 7 F 1 magnetic-dipole transition (MD) are changed drastically during controlled ceramization process of xerogels. This implies the efficient migration of Eu 3+ ions from amorphous silicate sol-gel network into low-phonon energy CaF 2 nanocrystals.

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Section: Luminescence Behavior Of Fabricated Sol-gel Materialsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Sol-Gel Glass-Ceramic Materials Containing CaF2:Eu3+ Fluoride Nanocrystals for Reddish-Orange Photoluminescence Applications

et al. 2019

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“…The nanostructure of the PCGs can be obtained using transmission electron microscopy (TEM) and its high-resolution analogue (HRTEM), as it is demonstrated in [105][106][107][108]. In particular, HRTEM can be used to reveal the lattice planes and the crystal-size distribution.…”

Section: Characterization Of Pcgsmentioning

confidence: 99%

“…Since then, there has been much interest in developing novel transparent oxyfluoride glass-ceramics containing REE-doped fluoride crystals. Reviews on transparent oxyfluoride GCs in bulk form can be found in [163] and [108]. Some of the first transparent oxyfluoride GC fibers were with the composition of 48SiO 2 -11Al 2 O 3 -7Na 2 CO 3 -10CaO-10PbO-11PbF 2 -3ErF 3 and 48SiO 2 -11Al 2 O 3 -7Na 2 CO 3 -10CaO-10PbO-10PbF 2 -3YbF 3 -1ErF 3 [105].…”

Section: Glass-ceramics Fibersmentioning

confidence: 99%

Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses

Veber

Vermillac

et al. 2019

Fibers

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For years, scientists have been looking for different techniques to make glasses perfect: fully amorphous and ideally homogeneous. Meanwhile, recent advances in the development of particle-containing glasses (PCG), defined in this paper as glass-ceramics, glasses doped with metallic nanoparticles, and phase-separated glasses show that these "imperfect" glasses can result in better optical materials if particles of desired chemistry, size, and shape are present in the glass. It has been shown that PCGs can be used for the fabrication of nanostructured fibers-a novel class of media for fiber optics. These unique optical fibers are able to outperform their traditional glass counterparts in terms of available emission spectral range, quantum efficiency, non-linear properties, fabricated sensors sensitivity, and other parameters. Being rather special, nanostructured fibers require new, unconventional solutions on the materials used, fabrication, and characterization techniques, limiting the use of these novel materials. This work overviews practical aspects and progress in the fabrication and characterization methods of the particle-containing glasses with particular attention to nanostructured fibers made of these materials. A review of the recent achievements shows that current technologies allow producing high-optical quality PCG-fibers of different types, and the unique optical properties of these nanostructured fibers make them prospective for applications in lasers, optical communications, medicine, lighting, and other areas of science and industry.Made of glass, optical fibers inherited all positive and negative properties of this material. Glasses are easy and inexpensive to produce on any scale and in any shape, they can possess high chemical stability and mechanical strength, and have high transparency. However, they could hardly compete, for example, with crystalline materials in thermal conductivity, or rare-earth elements' absorption, emission cross-sections, and available transparency range. Recent advances in glass science showed that properties of this material can be significantly improved if some additional phases are formed or impregnated in the glass. In particular, advances have been achieved in the development of particle-containing glasses: glass-ceramic materials, glasses doped with metallic nanoparticles, and phase-separated glasses. To date, these particle-containing glasses have become quite common and actively used in case of the bulk materials, but are still rather new for fiber optics.The purpose of this review is to summarize recent advances in the fabrication of structured fibers made of particle-containing glasses, their potential benefits, their actual properties, and their potential applications. The review covers three types of particle-containing glasses (PCG): crystalline dielectric particles, i.e., glass-ceramics; metallic nanoparticles (MeNPs); and dielectric amorphous particles, i.e., phase-separated glasses.First, we consider properties of the PCG bulk materials, their potenti...

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“…Another great advantage of GCs with respect to other kinds of materials is related with the availability of different processing methods: from classical melt‐quenching (MQ) to sol‐gel (SG), that allows the preparation of materials as bulk, films, powder or fibers. Most works published up to date about oxyfluoride GCs concern bulk materials prepared MQ doped with RE ions, however, a review paper about SG oxyfluoride GCs was also published recently . Recently, the preparation of optical fibers with GC core has emerged as interesting field and several works have been published since 2015.…”

Section: Introductionmentioning

confidence: 96%

Effect of dopant precursors on the optical properties of rare‐earths doped oxyfluoride glass‐ceramics

et al. 2019

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The crystallization of fluoride nanocrystals (NCs) in chemically and mechanically stable aluminosilicate glasses has shown interesting optical properties even for small crystal fractions (10‐15 wt%). When rare‐earth (RE) ions are used as dopants, crystal‐like features can be reproduced and an increase in the emission and/or energy transfer processes, with respect to the starting glasses, is observed. A crucial point for these materials is the study of the local surrounding of RE ions and their incorporation in the NCs. In fact, the effective concentration in the NCs can be much higher than the nominal concentration, up to one order of magnitude or even higher. The knowledge of RE ions incorporation in the NCs permits choosing proper doping levels to optimize both linear and nonlinear optical properties. In this work, transparent oxyfluoride glass‐ceramics with LaF3 NCs, doped with Nd3+ and Er3+ using oxide and fluoride precursors, were prepared using the melt‐quenching method and controlled crystallization. The local surrounding of the RE ions was studied using X‐ray absorption spectroscopy, electron paramagnetic resonance and photoluminiscence. The results show that most RE ions are already in a fluorine‐rich amorphous environment even in the initial glass. The crystallization process provokes the RE ion redistribution and incorporation in the fluoride NCs. The different RE precursors, used as oxides or fluorides, have an influence on the incorporation of the RE in the NCs and, as a consequence, on the final optical properties.

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Transparent Glass-Ceramics Produced by Sol-Gel: A Suitable Alternative for Photonic Materials

Cited by 46 publications

References 115 publications

Sol-Gel Glass-Ceramic Materials Containing CaF2:Eu3+ Fluoride Nanocrystals for Reddish-Orange Photoluminescence Applications

Sol-Gel Glass-Ceramic Materials Containing CaF2:Eu3+ Fluoride Nanocrystals for Reddish-Orange Photoluminescence Applications

Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses

Effect of dopant precursors on the optical properties of rare‐earths doped oxyfluoride glass‐ceramics

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