Structural and optical properties of lithium bismuthate glasses

2002 ◽  
Vol 17 (8) ◽  
pp. 1941-1944 ◽  
Author(s):  
A. Pan ◽  
A. Ghosh
Keyword(s):  
Optical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Structural Unit ◽  
Infrared Region ◽  
Compositional Variation ◽  
Optical Study ◽  
Structural And Optical Properties ◽  
Transmission Window ◽  
Ion Conducting

Structural and optical properties of ion - conducting lithium bismuthate glasses are reported here. The structure of these glasses has been explored from the compositional variation of the density, molar volume, and glass transition temperature. The optical study in the visible and infrared region indicates a large transmission window for these glasses. The BiO6 octahedra were identified as the main structural unit from the Raman spectra of these bismuthate glasses.

Thermal and Optical Properties of High Refractive Index xNb2O5-(1-x)La2O3 Glasses Prepared by Aerodynamic Levitation Method

2013 ◽  
Vol 749 ◽  
pp. 255-259 ◽  
Author(s):  
Yu Xing Cheng ◽  
Gui Sheng Xu ◽  
Jian Ding Yu ◽  
Xiu Hong Pan ◽  
Ming Hui Zhang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
High Refractive Index ◽  
Infrared Region ◽  
Crystallization Peak ◽  
Promising Application ◽  
Aerodynamic Levitation

Bulk glasses of xNb2O5(1-x)La2O3(NL) with high refractive index were prepared by aerodynamic levitation method. Only when x ranges from 0.62 to 0.72, NL glasses can be obtained. The effect of compositions on the thermal property and refractive index was investigated. The results indicated that the glass transition temperature ranged from 733 to 767 with the increasing of La2O3in NL glasses, while the crystallization peak ranged from 811 to 837 . The glasses had high refractive index ranging from 2.26 to 2.31. According to the Drude-Voigt relationship, the Abbe number of the glasses was calculated to be about 20. This type of glass was colorless and transparent in the region from visible to infrared region. Thus, the niobate glass system has promising application in lenses, next-generation optical disk, and endoscopes.

scholarly journals Structural, Optical and Dynamic Properties of Thin Smectic Films

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 321 ◽  
Author(s):  
Izabela Śliwa ◽  
A. V. Zakharov
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Transition Temperature ◽  
Solid Surface ◽  
Dynamic Properties ◽  
Condensed Matter ◽  
Theoretical Description ◽  
Structural And Optical Properties ◽  
Statistical Mechanical ◽  
Crystal Phases

The problem of predicting structural and dynamic behavior associated with thin smectic films, both deposited on a solid surface or stretched over an opening, when the temperature is slowly increased above the bulk transition temperature towards either the nematic or isotropic phases, remains an interesting one in the physics of condensed matter. A useful route in studies of structural and optical properties of thin smectic films is provided by a combination of statistical–mechanical theories, hydrodynamics of liquid crystal phases, and optical and calorimetric techniques. We believe that this review shows some useful routes not only for the further examining of the validity of a theoretical description of thin smectic films, both deposited on a solid surface or stretched over an opening, but also for analyzing their structural, optical, and dynamic properties.

The Variations of Cu/Ga Ratio on the Structural and Optical Properties of Cu(In, Ga)Se2 Thin Films by Co-Evaporation Technology

2011 ◽  
Vol 110-116 ◽  
pp. 1187-1190
Author(s):  
Hung Ing Chen ◽  
Jen Cheng Wang ◽  
Chia Hui Fang ◽  
Yu Ting Liang ◽  
Tung Po Hsieh ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Properties ◽  
Compositional Variation ◽  
Structural And Optical Properties ◽  
Recombination Mechanism ◽  
Soda Lime Glass Substrate ◽  
Pl Spectra ◽  
Carrier Recombination ◽  
Cigs Thin Film

The result of an extensive research on this material is the achievement of approaching 20% efficiency by the co-evaporation of copper, indium, gallium and selenium elements. Recently, photoluminescence (PL) spectra have been studied on Cu (In,Ga) Se2(CIGS) thin films and CIGS solar cells, to clarify the carrier recombination process. The CIGS layers were grown on the Mo-coated soda-lime glass substrate by the three stage process and four sources co-evaporation of constituent elements onto a heated substrate. It has found that the structural and optical properties of the CIGS thin film was influenced by the Cu/Ga ratio (RCu/Ga) of the CIGS thin film compositional variation. The X-ray diffraction and PL spectra were used to characterize the structure property and carrier recombination mechanism of CIGS thin film.

Structural and Physical Characterization of Li2O:P2O5:MO3 (M = Cr2, Mo, W) Ion Conducting Glasses

1992 ◽  
Vol 293 ◽  
Author(s):  
B.V.R. Chowdari ◽  
K.L. Tan ◽  
W.T. Chia
Keyword(s):  
Raman Spectroscopy ◽  
Glass Transition ◽  
Transition Temperature ◽  
Photoelectron Spectroscopy ◽  
Oxygen Species ◽  
X Ray ◽  
Ion Conducting ◽  
Phosphate Groups ◽  
Glass Compositions

AbstractThe conductivity of the Li2O:P2O5:MO3 (M = Cr2, Mo, W) glasses increases as P2O5 is progressively substituted by MO3 and as the Li2O content increases. Amongst the glass compositions studied, the 0.50Li2O:0.20P2O5:0.30WO3 glass has the highest conductivity at 25°C of 2. 1×10−6 ×−1 cm−1. The glass transition temperature of the glasses increases initially with network former substitution, reaches a maximum at around MO3/P2O5 = 1, and decreases with further substitution. X-ray photoelectron spectroscopy reveals the presence of M ions in more than one oxidation state and oxygen species such as P=O, P-O-P, P-O, M-O-M, M-O and P-O-M. Raman spectroscopy shows that the Li2O:P2O5:MoO3 and Li2O:P2O5:WO3 glasses consist of PO4, MoO4 (WO4) and MoO6 (WO6) polyhedra while the Li2O:P2O5:Cr2O3 glasses consist of the PO4 and CrO6 polyhedra only. The phosphate groups are preferentially modified by Li2O in comparison with the tungstate, molybdate and chromate groups. The increasing number of non-bridging oxygen atoms per phosphate group may be related to the increasing conductivity with the progressive substitution of MO3 for P2O5.

scholarly journals Carbon Soot Polymer Nanocomposites (CSPNCs): Production, Surface Morphological, Glass Transition Temperature Phenomenon and Optical Properties

2021 ◽  
Author(s):  
Rakhi Tailor ◽  
Yogesh Kumar Vijay ◽  
Minal Bafna
Keyword(s):  
Optical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Polymer Nanocomposites ◽  
Synthesis Methods ◽  
Solution Casting ◽  
Deposition Method ◽  
The Third ◽  
Carbon Soot ◽  
Solution Casting Method

The present chapter covers the production and properties of carbon soot nanoparticles (CSNPCs) and their doped carbon soot polymer nanocomposites (CSPNCs). The first part of this chapter will provide a brief introduction of carbon soot, its morphology, production and synthesis methods. The second part will explain the investigation of carbon soot nanoparticles by flame deposition method and their properties. The third part will provide a short knowledge on polymer nanocomposites (PNCs) and their processing methods. The last part will illustrate the production of carbon soot polymer nanocomposites by solution casting method and their important properties. At the end, the chapter concludes with future scopes.

Structural Rigidity, Percolation and Transition-Temperature Study of the Ge19Se81-xSbx System

2011 ◽  
Vol 316-317 ◽  
pp. 37-44 ◽  
Author(s):  
Neha Sharma ◽  
Sunanda Sharda ◽  
Vineet Sharma ◽  
Pankaj Sharma
Keyword(s):  
Optical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Physical Parameters ◽  
Transmission Losses ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural Rigidity ◽  
Rigidity Percolation ◽  
Attractive Candidate

Selenium-based glasses are attractive candidate materials because of their low transmission losses and other optical properties. In the present paper, samples of Ge19Se81-xSbx (x = 0, 4, 8, 12, 16, 17.2, 20) were prepared by using the melt-quench technique, and their X-ray diffraction spectra were studied. Some of the physical parameters were calculated theoretically. It was observed that the glass transition temperature increased up to x = 17.2 and then decreased whereas the theoretically calculated band-gap decreased with increasing Sb content.

New Stable Iodide Glasses in the Cd-As-I and Cd-As-Ge-I Systems

1989 ◽  
Vol 172 ◽  
Author(s):  
Jong Heo ◽  
George H. Sigel
Keyword(s):  
Differential Scanning Calorimetry ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Optical Fibers ◽  
Liquid Water ◽  
Infrared Region ◽  
Chemical Durability ◽  
Scanning Calorimetry ◽  
Glass Forming

AbstractIodide glasses presently being investigated suffer from their poor glass forming abilities, thermal instabilities and general lack of chemical durability. Glasses in the Cd-As-I and Cd-As-Ge-I systems are investigated in this study for the purpose of developing water-resistant, thermally stable iodide glasses and optical fibers. Differential scanning calorimetry(DSC) showed that glasses in these systems have glass transition temperature(Tg) values above 300°C. Devitrification of glasses during cooling and reheating can be suppressed by incorporating small amount of Ge atoms into ternary Cd-As-I glasses. They are transparent up to 14μm in the infrared region with excellent durability against liquid water at 90°C.

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