Upconversion emissions in YAG glass ceramics doped with Tm3+/Yb3+ ions

Li, Yuhua; Chen, Baojiu; Zhao, Xin; Wang, Zhiqiang; Lin, Hai

doi:10.1016/j.jallcom.2012.05.009

Cited by 15 publications

(3 citation statements)

References 55 publications

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“…The transition temperature (Tg) of Tm 3+ /Yb 3+ co-doped LYAS glasses is derived to be 814 °C, which reveals the value of Tg in Ref. [9] was underestimated due to a DTA testing system failure. Tg = 814 °C manifests that a higher annealed temperature, such as 800 °C, can be adopted to achieve the internal stress relaxation and avoid rupturing faced with mechanical collision, thermal shock stress and other stress conditions.…”

Section: Resultsmentioning

confidence: 99%

Thermodynamic Properties of Rare-Earth Ions Doped Lithium-Yttrium-Aluminium-Silicate Glasses

Han

Cheng

et al. 2013

AMR

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hermodynamic properties including characteristic temperatures and thermal parameters of rare-earth (RE) ions doped lithium-yttrium-aluminium-silicate (LYAS) glasses have been investigated. Glass transition temperature (Tg), onset crystallization temperature (Tx), crystallization temperature (Tc), temperature difference value (DT) and Saad-Poulain criterion (S) in Tm3+/Yb3+ co-doped LYAS glasses are obtained to be 814, 1008, 1043, 194 and 8.34 °C, respectively, and the corresponding values of Sm3+ doped LYAS glasses are derived to be 825, 1002, 1053, 177 and 10.94 °C. Evaluations on thermodynamic properties indicate that LYAS glasses are a promising candidate for drawing optical fibers in the temperature range of 850−950 °C.

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Section: Resultsmentioning

confidence: 99%

Thermodynamic Properties of Rare-Earth Ions Doped Lithium-Yttrium-Aluminium-Silicate Glasses

Han

Cheng

et al. 2013

AMR

Self Cite

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“…In addition, the resulting YAG-Al 2 O 3 nanoceramic has a lower transmittance in the visible light region than YAG single crystal and the stoichiometric YAG transparent ceramic due to the light scattering caused by the refractive index difference between the small amount of the Al 2 O 3 and YAG matrix. Analogously, some reported YAG-based glass-ceramics derived from controlled crystallization of multi component glasses, such as [44], and [45], have relatively low transparency on account of the light scattering caused by the refractive index difference between the YAG grains and glass matrix, but they exhibit practical photoluminescence properties. Considering the high theoretical YAG crystalline fraction (77 wt%), the YAG-Al 2 O 3 nanoceramic drived from full crystalizatin of rare earth doped AY26 glass is predicted to have high photoluminescence efficiency.…”

Section: Preparation Of Transparent Yag-al 2 O 3 Nanoceramicsmentioning

confidence: 92%

Crystallization kinetics of Al2O3-26mol%Y2O3 glass and full crystallized transparent Y3Al5O12-based nanoceramic

Zhang

et al. 2021

Journal of the European Ceramic Society

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Transparent Y 3 Al 5 O 12-based polycrystalline ceramics with excessive Al 2 O 3 composition (Al 2 O 3-26 mol%Y 2 O 3 , AY26) have been demonstrated as potential host materials for phosphor applications. However, the crystallization mechanism of AY26 glass has not been thoroughly investigated so far. In this work, the non-isothermal crystallization kinetics of AY26 glass was experimentally analyzed. The AY26 glass depicts high activation energy and crystallization mechanism of volume nucleation followed by three-dimensional crystal growth mode. Based on the analysis, a novel highly transparent YAG-Al 2 O 3 nanoceramic material was elaborated at lower temperature of 963 ℃ by using pressureless glass crystallization. The biphase nanoceramic is characterized by the structure of YAG nanocrystals surrounded with homogeneous thin Al 2 O 3 layers. It is extremely transparent from visible to mid-infrared region, particularly the transmittance can reach the theoretical limit of YAG transparent ceramic in NIR and MIR regions. Besides, it has almost same hardness of 21 GPa with YAG single crystal and YAG transparent ceramic.

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“…The energy level diagram can demonstrate the mechanism of cooperative energy transfer, as shown in Figure 9(e). Electrons of adjacent Yb 3+ are simultaneously excited to their 2 F 5/2 energy states upon 980 nm laser excitation through the cooperative energy transfer; [126,127] the absorbed energy is then transferred to 1 G 4 energy state of Tm 3+ and emitted as radiative emission finally in the form of up‐conversion at 485 nm. This process can be generalized as 3 H 6 (Tm 3+ )+ 2 F 5/2 (Yb 3+ )+ 2 F 5/2 (Yb 3+ )→ 1 G 4 (Tm 3+ )+ 2 F 7/2 (Yb 3+ )+ 2 F 7/2 (Yb 3+ ).…”

Section: Properties and Applicationsmentioning

confidence: 99%

Physicochemical Properties of High‐Entropy Oxides

Chen

Sun

et al. 2022

The Chemical Record

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The development of industry has triggered an increasingly severe demand for new functional materials. In recent years, researches on high‐entropy oxides (HEOs) are more comprehensive and in‐depth, and their fascinating properties are gradually known to the public. The unique elemental synergistic effect and lattice distortion endow the high‐entropy family with various untapped potential, and wide application fields and outstanding performance of HEOs make them candidates for future materials. In this review, the concept, structure, and synthesis of HEOs are firstly highlighted. Secondly, a variety of excellent properties and applications in the fields of mechanics, electrics, thermotics, optics and magnetics are summarized. This work provides a comprehensive overview about HEOs, facilitating the development of modern functionalities of the high‐entropy family.

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Upconversion emissions in YAG glass ceramics doped with Tm3+/Yb3+ ions

Cited by 15 publications

References 55 publications

Thermodynamic Properties of Rare-Earth Ions Doped Lithium-Yttrium-Aluminium-Silicate Glasses

Thermodynamic Properties of Rare-Earth Ions Doped Lithium-Yttrium-Aluminium-Silicate Glasses

Crystallization kinetics of Al2O3-26mol%Y2O3 glass and full crystallized transparent Y3Al5O12-based nanoceramic

Physicochemical Properties of High‐Entropy Oxides

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