Valence band dependence on thermal treatment of gold doped glasses and glass ceramics

2012 ◽  
Vol 111 (3) ◽  
pp. 034701 ◽  
Author(s):  
T. Radu ◽  
D. Benea ◽  
R. Ciceo-Lucacel ◽  
O. Ponta ◽  
S. Simon
Keyword(s):  
Thermal Treatment ◽  
Valence Band ◽  
Glass Ceramics ◽  
Doped Glasses

Fluorescence lifetimes of neodymium-doped glasses and glass-ceramics

1973 ◽  
Vol 77 (8) ◽  
pp. 1016-1018 ◽  
Author(s):  
Charles F. Rapp ◽  
John Chrysochoos
Keyword(s):  
Glass Ceramics ◽  
Fluorescence Lifetimes ◽  
Doped Glasses

Preparation and up-conversion characterization of CaF2:Yb3+, Ho3+/BaF2:Yb3+, Ho3+ co-doped glasses and glass–ceramics

2015 ◽  
Vol 640 ◽  
pp. 311-316 ◽  
Author(s):  
Zhao-xia Hou ◽  
Hang-xin Li ◽  
Zhao-lu Xue ◽  
Mei-han Wang ◽  
Xiao-dan Hu ◽  
...  
Keyword(s):  
Glass Ceramics ◽  
Doped Glasses ◽  
Co Doped

Structural and Spectroscopic Assessment of Er3+-Activated SiO2-HfO2 Glass Ceramics Planar Waveguides

2008 ◽  
Vol 55 ◽  
pp. 56-61
Author(s):  
L. Minati ◽  
Giorgio Speranza ◽  
Yoann Jestin ◽  
Cristina Armellini ◽  
Andrea Chiappini ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Spinodal Decomposition ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Emission Spectra ◽  
Planar Waveguides ◽  
Material Structure ◽  
Crystalline Environment ◽  
Concentration Threshold

Two series of xHfO2 - (100-x) SiO2 (x=10, 20, 30 mol%) glass-ceramics planar waveguides doped with 0.3 mol% Er3+ ions were prepared by the sol-gel route. A thermal treatment at 1000°C was applied to the second series of samples to nucleate HfO2 crystals. The waveguides were analyzed by X-ray photoelectron spectroscopy to study the effect of the Hf concentration and of the annealing on the material structure. XPS shows that in the first series of samples a Hf concentration threshold exists. Above this threshold the material undergoes a spinodal decomposition with formation of HfO2 rich domains. In the second series of samples the presence of thermal treatment lowers the concentration threshold so that the phase separation occurs also at a Hf concentration of 10%mol. In the waveguides where spinodal decomposition in present, the emission spectra from the Er3+ ions reveal a sensible narrowing of the 4I13/2 → 4I15/2 line. This demonstrates the presence of a crystalline environment for the Er3+ ions since the inhomogeneous broadening due to the disordered glassy network is suppressed. These results may have important implications for the fabrication of photonic devices with increased efficiency.

Intense UV and visible up-conversion emissions from RE-doped SiO2–BaGdF5 nano-glass-ceramics

2018 ◽  
Vol 20 (32) ◽  
pp. 20910-20918 ◽  
Author(s):  
J. del-Castillo ◽  
A. C. Yanes
Keyword(s):  
Thermal Treatment ◽  
Sol Gel ◽  
Glass Ceramics ◽  
High Efficient ◽  
Gel Glasses

High-efficient UV and VIS up-conversion RE-doped nano-glass-ceramics comprising BaGdF5 nanocrystals, have been developed under thermal treatment of precursor sol–gel glasses.

scholarly journals Luminescence Characteristics of Te- and Bi-Doped Glasses and Glass-Ceramics

2007 ◽  
Vol 115 (1340) ◽  
pp. 259-263 ◽  
Author(s):  
Sasithorn KHONTHON ◽  
Shigeki MORIMOTO ◽  
Yusuke ARAI ◽  
Yasutake OHISHI
Keyword(s):  
Glass Ceramics ◽  
Doped Glasses ◽  
Luminescence Characteristics

Chemical Route to Aluminosilicate Gels, Glasses and Ceramics

1986 ◽  
Vol 73 ◽  
Author(s):  
J. C. Pouxviel ◽  
J. P. Boilot ◽  
A. Dauger ◽  
L. Huber
Keyword(s):  
Thermal Treatment ◽  
Glass Ceramics ◽  
Silica Matrix ◽  
Chemical Route ◽  
Transparent Glass ◽  
Aluminosilicate Glasses ◽  
Optically Transparent ◽  
Metal Organic ◽  
Organic Precursors ◽  
Homogeneous Crystallization

ABSTRACTChemically ultra-homogeneous gels have been prepared, in the SiO2-Al2O3 system, using new metal-organic precursors with Al-O-Si linkages. By thermal treatment at 900°C, transparent monolithic gels lead to aluminosilicate glasses and above 1000°C, to optically transparent glass-ceramics (for instance by homogeneous crystallization of mullite in an amorphous silica matrix).

scholarly journals Conversion of coal fly ash glass into glass-ceramics by controlled thermal treatment

2021 ◽  
Vol 40 (2) ◽  
pp. 307
Author(s):  
Biljana Angjusheva ◽  
Vojo Jovanov ◽  
Emilija Fidanchevski
Keyword(s):  
Fly Ash ◽  
Thermal Treatment ◽  
Coal Fly Ash ◽  
Glass Ceramics
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