scholarly journals Inversion in the temperature coefficient of the optical path length close to the glass transition temperature in tellurite glasses

2009 ◽  
Vol 94 (25) ◽  
pp. 251903 ◽  
Author(s):  
S. M. Lima ◽  
L. H. C. Andrade ◽  
E. A. Falcão ◽  
A. Steimacher ◽  
N. G. C. Astrath ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Temperature Coefficient ◽  
Path Length ◽  
Optical Path Length ◽  
Optical Path ◽  
Tellurite Glasses

Thermal lens determination of the temperature coefficient of optical path length in optical materials

2003 ◽  
Vol 74 (1) ◽  
pp. 877-880 ◽  
Author(s):  
A. A. Andrade ◽  
T. Catunda ◽  
I. Bodnar ◽  
J. Mura ◽  
M. L. Baesso
Keyword(s):  
Temperature Coefficient ◽  
Thermal Lens ◽  
Path Length ◽  
Optical Materials ◽  
Optical Path Length ◽  
Optical Path

The temperature coefficient of the optical path length as a function of the temperature in different optical glasses

2004 ◽  
Vol 348 ◽  
pp. 240-244 ◽  
Author(s):  
A. Steimacher ◽  
A.N. Medina ◽  
A.C. Bento ◽  
J.H. Rohling ◽  
M.L. Baesso ◽  
...  
Keyword(s):  
Temperature Coefficient ◽  
Path Length ◽  
Optical Path Length ◽  
Optical Path ◽  
Optical Glasses

scholarly journals Calculation of thermal expansion, glass transition temperature and glass density in the system RO–Al2O3–B2O3–SiO2 (where RO=BaO, SrO, CaO, MgO, ZnO)

2020 ◽  
pp. 69-74
Author(s):  
E.V. Karasik ◽  
◽  
Yu.S. Hordieiev ◽  
Keyword(s):  
Thermal Expansion ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Mathematical Models ◽  
Temperature Coefficient ◽  
Linear Expansion ◽  
Experimental Sample ◽  
Wide Range ◽  
Coefficient Of Linear Expansion

Glasses of the system RO–Al2O3–B2O3–SiO2 are used as a base for the fabrication of heat-resistant nonmetallic materials and general-purpose products. The purpose of this work is to develop mathematical models for calculating the temperature coefficient of linear expansion, glass transition temperature and density as a function of the composition of glass in the oxide system RO–Al2O3–B2O3–SiO2 where RO=BaO, SrO, CaO, MgO, ZnO. The disadvantage of the known models is that the range of their application is limited by the quantitative content of components in the glass. At the same time, an increase in the sample size of experimental compositions made it possible to obtain more accurate mathematical models for calculating these properties. The glasses included in the experimental sample are distinguished by a wide range of temperature coefficient of linear expansion (from 30 to 10510–7 К–1). The glass transition temperature of these glasses is within the range of 580–7100C, which allows a reasonable approach to the choice of temperature regime for the formation of the structure vitreous and glass-ceramic materials for different functional purposes. The mathematical models were developed with the use of the experimental and statistical method. The obtained mathematical models are adequate to the experimental data and allow calculating the thermal expansion, glass transition temperature and density of glasses; the mean-square deviations of temperature coefficient of linear expansion, glass transition temperature and density being 1.910–7 К–1, 16.00C and 0.06 g cm–3, respectively. Their accuracy is sufficient for the development of basic glass compositions for various functional purposes.

scholarly journals Characterization of Glassy TeO2 and Binary Potassium and Boron Tellurites

2020 ◽  
pp. 283-286
Author(s):  
Ms Megha ◽  
Ms Mansi
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Raman Spectra ◽  
Tellurite Glasses ◽  
Mid Infrared ◽  
Infrared Optics ◽  
Single Part ◽  
Better Than

<p>Tellurite glasses show potential for use in mid-infrared optical applications1, yet their structure has not been seriously contemplated. While they don't lead light better than chalcogenides, which are as of now the best glasses for infrared optics, they are a lot simpler to create. Potassium and boron tellurite glasses, including single part, quickly cooled TeO2, are accounted for and concentrated here. The outcomes incorporate the Glass Transition Temperature (Tg) estimations and Raman spectra. Proposed auxiliary models are additionally examined.</p>

Glass transition temperature-structural studies of tungstate tellurite glasses

2009 ◽  
Vol 118 (2-3) ◽  
pp. 298-302 ◽  
Author(s):  
G. Upender ◽  
Suresh Bharadwaj ◽  
A.M. Awasthi ◽  
V. Chandra Mouli
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Tellurite Glasses ◽  
Structural Studies
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