Calorimetric Features of High-Enthalpy Amorphous Solids and Glass-Softening Temperature of Water

2003 ◽  
Vol 107 (34) ◽  
pp. 9063-9070 ◽  
Author(s):  
G. P. Johari
Keyword(s):  
Softening Temperature ◽  
Amorphous Solids ◽  
High Enthalpy ◽  
Glass Softening

Properties Investigation of Yb3+-Doped Phosphate Glasses for Fiber Laser

2013 ◽  
Vol 573 ◽  
pp. 31-35
Author(s):  
His Wen Yang ◽  
Jin Ming Zhu ◽  
Yu Xiang Tsai ◽  
Chun Hsiung Lin ◽  
Cheng Hsing Hsu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Fluorescence Spectra ◽  
Coefficient Of Thermal Expansion ◽  
Fluorescence Emission ◽  
Softening Temperature ◽  
Chemical Durability ◽  
Phosphate Glasses ◽  
Content Increase ◽  
Glass Softening ◽  
Bridge Oxygen

The physical and optical properties of P2O5-Al2O3-ZnO glasses doped with different concentration of Yb3+ions were investigated. The experimental results indicated that density, chemical durability, glass transition temperature (Tg) and glass softening temperature (Td) of glasses increase with increasing the Yb2O3content of glasses. However, the coefficient of thermal expansion (α) for glasses decrease with increasing the Yb2O3content. From the results of Fourier transform infrared spectroscopy, the numbers of (-P-O-P-) bonds decrease and (-P-O-M+-) bonds increase with increasing the Yb2O3content. Increase of non-bridge oxygen (-P-O-M+-) raise the refractive index of glasses. Moreover, the results of absorption spectra indicate that the absorption peak of glasses are observed at both wavelengths of 916nm and 977nm. As increasing the concentration of Yb2O3, the absorption efficiencies become stronger. In accordance with the results of fluorescence spectra, the fluorescence emission of glasses are detected at wavelengths of 970nm, 995nm, 1020nm and 1048nm, respectively. The intensity of the fluorescence emission peaks significantly decrease at wavelengths of 970nm and 995nm as the concentration of Yb2O3increases. However, the intensity of the fluorescence emission peaks significantly increase at wavelength of 1048nm under the same condition.

Optical and nonlinear optical properties of copper nanocomposite glasses annealed near the glass softening temperature

2008 ◽  
Vol 281 (10) ◽  
pp. 2933-2937 ◽  
Author(s):  
B. Karthikeyan ◽  
M. Anija ◽  
C.S. Suchand Sandeep ◽  
T.M. Muhammad Nadeer ◽  
Reji Philip
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Softening Temperature ◽  
Nonlinear Optical Properties ◽  
Glass Softening

Influence of Carbon Content on the Qualities of Oxy-Fuel Float Glass

2010 ◽  
Vol 156-157 ◽  
pp. 1559-1563
Author(s):  
Xiao Qing Liu ◽  
Jun Lin Xie
Keyword(s):  
Thermal Expansion ◽  
Transition Temperature ◽  
Carbon Content ◽  
Water Content ◽  
Coefficient Of Thermal Expansion ◽  
Softening Temperature ◽  
Float Glass ◽  
Glass Melts ◽  
Glass Softening ◽  
Transition Temperature Increase

To optimize production technology of oxy-fuel float glass, a series of float glass with lower sulphate contents and 1%~5% carbon contents in glass batch were prepared under simulated oxy-fuel melting conditions. Infrared spectroscopy，thermal dilatometer and microscope were used to study water content and its state in glass melts, the change of coefficient of thermal expansion of glass, the glass softening temperature and transition temperature, and the number of bubbles in glass, respectively. The results show that the change of carbon content will slightly changes the water content, thermo properties of glass and the number of bubbles in glass. With the increase of carbon content, the coefficient of thermal expansion and the water content of glass generally decrease, while the number of bubbles, the softening temperature and the glass transition temperature increase. When the content of sulphate is 2%, the glass with 2% carbon content has the biggest water content and the best fining effect.

The glass-softening temperature range and non-Arrhenius dynamics: the case of vitrified water

2000 ◽  
Vol 278 (1-3) ◽  
pp. 58-68 ◽  
Author(s):  
G.P. Johari ◽  
M. Beiner ◽  
C. Macdonald ◽  
J. Wang
Keyword(s):  
Softening Temperature ◽  
Temperature Range ◽  
Glass Softening

Molecular kinetics in amorphous solids

1992 ◽  
Vol 89 ◽  
pp. 2073-2089 ◽  
Author(s):  
GP Johari
Keyword(s):  
Amorphous Solids

PHOTON-ECHO STUDY OF ULTRAFAST DEPHASING IN AMORPHOUS SOLIDS IN WIDE TEMPERATURE REGION WITH INCOHERENT LIGHT

1991 ◽  
Vol 01 (C7) ◽  
pp. C7-439-C7-442 ◽  
Author(s):  
N. V. GRUZDEV ◽  
E. G. SIL'KIS ◽  
V. D. TITOV ◽  
Yu. G. VAINER
Keyword(s):  
Temperature Region ◽  
Photon Echo ◽  
Amorphous Solids ◽  
Incoherent Light

PHONON DAMPING IN CRYSTALLINE AND AMORPHOUS SOLIDS AT HYPERSONIC FREQUENCIES

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-125-C6-127
Author(s):  
R. Vacher ◽  
J. Pelous
Keyword(s):  
Amorphous Solids

THERMAL DEPENDENCE OF THE STRUCTURE FACTOR IN AMORPHOUS SOLIDS

1985 ◽  
Vol 46 (C8) ◽  
pp. C8-281-C8-286 ◽  
Author(s):  
C. Tête ◽  
D. Boumazouza ◽  
G. Marchal ◽  
Ph. Mangin ◽  
J. Bouillot ◽  
...  
Keyword(s):  
Structure Factor ◽  
Amorphous Solids ◽  
Thermal Dependence
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