scholarly journals LiYF4-nanocrystal-embedded glass ceramics for upconversion: glass crystallization, optical thermometry and spectral conversion

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 2066-2073
Author(s):  
Xinyue Li ◽  
Liting Qiu ◽  
Youli Chen ◽  
Yiwen Zhu ◽  
Hua Yu ◽  
...  
Keyword(s):  
Glass Ceramics ◽  
Glass Crystallization ◽  
Melt Quenching ◽  
Optical Thermometry ◽  
Quenching Method ◽  
Spectral Conversion

LiYF4 NCs embedded GCs were fabricated via melt-quenching method and subsequent glass crystallization. It is evidenced that it is favorable of UC, which is promising in optical thermometry and spectral conversion.

Preparation, Characterization and Conductivity Studies of Li1.3M0.3Ti1.7(PO4)3 (M = Al, Cr and Fe) Glass–Ceramics

2012 ◽  
Vol 602-604 ◽  
pp. 548-552 ◽  
Author(s):  
Mei Mei Zhang ◽  
Jian An Liu ◽  
Wen He
Keyword(s):  
Thermal Stability ◽  
Grain Boundary ◽  
Powder Diffraction ◽  
Infrared Spectra ◽  
Hexagonal Lattice ◽  
Glass Ceramics ◽  
Total Conductivity ◽  
Melt Quenching ◽  
X Ray ◽  
Quenching Method

Nasicon type compounds of general formula Li1..3M0.3Ti1.7 (PO4)3 (M = Al, Cr, Fe) were prepared using melt quenching method. The samples were characterized by X-ray powder diffraction and infrared spectra. Thermal stability against crystallization was evaluated by DSC curve. All the compounds crystallize in hexagonal lattice with R-3c space group. The IR spectra show the characteristic PO4 vibrations. DSC curve reveals that the Li1.3Fe0.3Ti1.7(PO4)3 glass-ceramics possesses the better thermal stability against crystallization. Conductivity studies indicate that the total conductivity is dominated by the grain boundary

scholarly journals Broadband near-infrared quantum cutting by Ce–Yb codoped YAG transparent glass ceramics for silicon solar cells

RSC Advances ◽  
2018 ◽  
Vol 8 (41) ◽  
pp. 23268-23273 ◽  
Author(s):  
Yuping Tai ◽  
Xinzhong Li ◽  
Xigang Du ◽  
Bingli Pan ◽  
Guanghui Yuan
Keyword(s):  
Solar Cells ◽  
Near Infrared ◽  
Glass Ceramics ◽  
Silicon Solar Cells ◽  
Melt Quenching ◽  
Transparent Glass ◽  
Quantum Cutting ◽  
Quenching Method

Transparent glass ceramics containing YAG nanocrystals were prepared by a conventional melt-quenching method.

Self-crystallized novel transparent Na5Yb9F32: Er3+ glass-ceramics for optical thermometry and spectral conversion

2017 ◽  
Vol 722 ◽  
pp. 669-675 ◽  
Author(s):  
Fangfang Hu ◽  
Jiangkun Cao ◽  
Xiantao Wei ◽  
Siqi Lu ◽  
Xinyue Li ◽  
...  
Keyword(s):  
Glass Ceramics ◽  
Optical Thermometry ◽  
Spectral Conversion

Thermal Stability and Microstructure of Glasses and Glass-Ceramics in the System La2O3-PbO-MnO-B2O3

2008 ◽  
Vol 39-40 ◽  
pp. 177-180 ◽  
Author(s):  
Elena Kashchieva ◽  
Nikolai Dulguerov ◽  
Anna Staneva ◽  
Yanko B. Dimitriev
Keyword(s):  
Thermal Stability ◽  
Glass Ceramics ◽  
Melt Quenching ◽  
Tem Analysis ◽  
B2o3 Content ◽  
Compositional Range ◽  
Quenching Method ◽  
Thermal Stability Of

Glasses have been synthesized in the system La2O3-PbO-MnO-B2O3 varying the MnOcontent in large compositional range between 10 and 70 mol%. Glass-ceramics containing La0,6Pb0,4MnO3 phase have been obtained directly by melt quenching method. Transition and crystallization temperatures have been determined by DTA. The increasing of the B2O3-content improves the thermal stability of the glasses. By TEM analysis, different type microheterogeneous structures have been observed in compositions rich in B2O3.

Superconducting Properties of Bi-Sr-Ca-Cu-O Crystallized Glass

1999 ◽  
Vol 13 (09n10) ◽  
pp. 985-989
Author(s):  
S. Chudinov ◽  
S. Stizza ◽  
B. Kościelska ◽  
L. Murawski ◽  
W. Sadowski ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Glass Ceramics ◽  
Superconducting Phase ◽  
Superconducting Transition ◽  
Resistive Transition ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
Melt Quenching ◽  
X Ray ◽  
Quenching Method

This paper reports the crystallization and superconducting properties of Bi 4 Sr 3 Ca 3 Cu 4 O x glass-ceramics. The glass was prepared using the conventional melt-quenching method. X-ray diffraction pattern has shown that the annealing at temperature of 800°C converted the glass into glass-ceramics with Bi 2 Sr 2 CaCu 2 O x superconducting phase (2212-phase). The superconducing transition exhibits the change in the slope that is characteristic for two different superconducting phases. It is observed that T c (zero) increases from 20 K to 80 K with increasing time of annealing. The influence of magnetic field on the superconducting transition has been investigated. Our studies revealed a remarkable broadening of the resistive transition as a function of temperature with increasing field. The temperature width ( T c-T) of the transition for both phases increases with magnetic field according to Tinkham model.

The Effect of Processing Parameters on Properties of Bi2GeO5 Glass Ceramics

2008 ◽  
Vol 55-57 ◽  
pp. 437-440 ◽  
Author(s):  
P. Kantha ◽  
S. Sirisoonthorn ◽  
Kamonpan Pengpat
Keyword(s):  
Dielectric Properties ◽  
Ferroelectric Phase ◽  
Glass Ceramics ◽  
Processing Parameters ◽  
Lead Free ◽  
Second Phase ◽  
Melt Quenching ◽  
Air Atmosphere ◽  
Two Phases ◽  
Quenching Method

In this research, it is interesting to fabricate glass ceramics containing lead free ferroelectric crystals. The new lead free ferroelectric phase of interest is orthorhombic Bi2GeO5 which are precipitated in the BiO1.5-GeO2-BO1.5 system and studied in the region of 60 mol% BiO1.5:20 mol% GeO2: 20 mol% BO1.5. The glasses were prepared by conventional melt-quenching method. The glasses were melted separately in Pt and Al2O3 crucible in an air atmosphere. It is found that the as-received glasses were easily obtained from Al2O3 crucible while that from Pt crucible devitrification of Bi2GeO5 crystals were observed in some glasses, giving rise to an instability and difficulty in obtaining good based glasses by using this Pt crucible. The glass ceramics prepared from Pt crucible crystallized into two phases of the expected Bi2GeO5 and second phase Bi4Ge3O12 while Bi2GeO5 phase only observed in the glass ceramics prepared from Al2O3 crucible. Crystallinity and phases of the glass ceramics have a significant effect on their dielectric properties.

Luminescence properties of Er3+-doped transparent NaYb2F7 glass-ceramics for optical thermometry and spectral conversion

2016 ◽  
Vol 4 (42) ◽  
pp. 9976-9985 ◽  
Author(s):  
Fangfang Hu ◽  
Jiangkun Cao ◽  
Xiantao Wei ◽  
Xinyue Li ◽  
Jiajia Cai ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Glass Ceramics ◽  
Emission Spectra ◽  
Luminescence Properties ◽  
Transmission Electron ◽  
Optical Thermometry ◽  
Microscopy Images ◽  
Spectral Conversion

(a) Transmission electron microscopy images and (b) normalized up-conversion emission spectra of transparent Er3+-doped NaYb2F7 GC680 at various temperatures from 300 to 773 K.

scholarly journals In Situ Synthesis of β-Na1.5Y1.5F6: Er3+ Crystals in Oxyfluoride Silicate Glass for Temperature Sensors and Their Spectral Conversion and Optical Thermometry Analysis

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6901
Author(s):  
Rajesh Dagupati ◽  
Robert Klement ◽  
Ramaraghavulu Rajavaram ◽  
José J. Velázquez ◽  
Dušan Galusek
Keyword(s):  
Energy Levels ◽  
Glass Ceramics ◽  
Relative Sensitivity ◽  
Spectroscopic Techniques ◽  
Temperature Dependent ◽  
Optical Thermometry ◽  
Bright Green ◽  
Quenching Method ◽  
Doped Glass

Transparent oxyfluoride glass-ceramics (GCs) with embedded β-Na1.5Y1.5F6 crystals doped with Er3+ ions were fabricated by a melt-quenching method with subsequent heat-treatment. The structural characterizations and spectroscopic techniques were performed to verify the precipitation of β-Na1.5Y1.5F6 crystals and partition of the Er3+ dopant into the crystals. Bright green up-conversion (UC) emission was achieved in Er3+-doped glass-ceramic (Er-GC). Furthermore, the temperature-dependent visible UC behavior based on thermally coupled energy levels (TCLs) and non-thermally coupled energy levels (NTCLs) was also examined in the temperature range 298 k to 823 K with maximum relative sensitivity (Sr) of 1.1% K−1 at 298 K for TCLs in Er-G and Er-GC samples.

scholarly journals Morphology and Magnetic Properties of Ferriferous Two-Phase Sodium Borosilicate Glasses

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Alexander Naberezhnov ◽  
Nadezda Porechnaya ◽  
Viktor Nizhankovskii ◽  
Alexey Filimonov ◽  
Bernard Nacke
Keyword(s):  
Magnetic Properties ◽  
Iron Oxides ◽  
Channel Structure ◽  
Borosilicate Glasses ◽  
Melt Quenching ◽  
Two Phase ◽  
Furnace Charge ◽  
Self Assembling ◽  
Quenching Method ◽  
Drop Structure

This contribution is devoted to the study of morphology and magnetic properties of sodium borosilicate glasses with different concentrations (15, 20, and 25 wt.%) ofα-Fe2O3in an initial furnace charge. These glasses were prepared by a melt-quenching method. For all glasses a coexistence of drop-like and two-phase interpenetrative structures is observed. The most part of a drop structure is formed by self-assembling iron oxides particles. All types of glasses demonstrate the magnetic properties and can be used for preparation of porous magnetic matrices with nanometer through dendrite channel structure.

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