Glass material and their advanced applications

The present review summarizes the progress made in the area of glass science and also propose new definition of glass. The applications of glasses in everyday life and especially glasses used for light emitting devices, optical displays, optical fibers, amplifiers, lasers which are of special interest. Among these materials rare earth ions doped glasses are of great important to optoelectronics and are widely used in optical fiber amplifiers and solid state high power lasers for telecommunications and light emitting diodes. Optical fiber revolutionized the glass industry and is been used as sensing applications which depends upon light wavelength, fiber parameters, fiber geometry, and metal layer properties. Even smart glasses play a vital role in the medical field

Characterization and structural studies of lithium doped lead zinc phosphate glass system

Glasses in the system (PbO) 30(P 2O 5) 40(ZnO) 30-x(Li 2O) x (where x = 0, 15, 20, 25, 30 mol) and (PbO) 30(P 2O 5) 50(ZnO) 20-x(Li 2O) x (where x = 0, 5, 10, 15, 20 mol) were prepared by conventional melt quenching technique. XRD and DSC measurements were performed to confirm their amorphous nature. Thermal stability factor (S) has been evaluated using the values of T g and T c. The refractive indices of these glasses lie in the range of 1.40-1.45. IR spectra of these glasses show absorption peaks in the range 1233-1247 cm -1, 1076-1087 cm -1, 905-894 cm -1, 735-731 cm -1 and 531-556 cm -1 corresponding to PO, PO -, (POP) AS, (POP) S and OPO vibrations respectively. The peak corresponding to PO, shows red shift with increasing Li 2O content indicating depolymerization of phosphate network. © 2012 Elsevier B.V

Elastic properties of Li+ doped lead zinc borate glasses

Glasses in the system 0.25PbO-​(0.25-​x) ZnO-​0.5B2O3-​xLi2O have been prepd. by the melt quenching technique. Elastic properties, DSC studies have been employed to study the role of Li2O in the present glass system. Elastic properties and Debye temp. have been detd. using pulsed echo ultrasonic interferometer operating at 10MHz. Sound velocities Vl, Vt and elastic moduli decrease up to 5 mol​% and then gradually increase with increase in Li2O concn. Debye temp. and the glass transition temp. decreases with increase in Li2O. Densities remains almost const. up to 15 mol​% Li2O concn. and increases monotonically while the molar volume decreases with the increase of Li2O concn. The results are discussed in view of the borate structural network and dual role of Zn and Pb in these glasses. (c) 2014 American Institute of Physics

Spectroscopic Properties of Sm3+-Doped Lanthanum Borogermanate Glass

Ultraviolet–visible–near infrared (UV–vis–NIR) absorption and photoluminescence of (25-x) La2O3–25B2O3–50GeO2 glass series have been studied with different concentrations (x=0.1–1.0 wt%) of Sm2O3 as an optically active dopant. The values of Judd–Ofelt (JO) parameters (Ot) follow the trend O2>O4>O6. Visible emission and decay times from the 4G5/2 level and its relative quantum efficiencies are measured. Intense reddish-orange emission corresponding to 4G5/2?6H7/2 transition has been observed in these glasses under 488 nm excitation. A decrease in the quantum yield is observed with increasing Sm3+ ion concentration beyond 1% doping level

Thermal analysis, spectral characterization and refractive index studies of lithium doped PbO-ZnO-B2O3 glass

Lithium containing lead zinc borate glasseshave been prepared by melt quenching technique. X-ray diffraction reveals the amorphous nature of the glass. Differential scanning calorimeter (DSC) study was carried out in the temperature range RT to 600°C temperature and found glass transition temperature of these glasses decreases with increase in inter substitution of Pb and Zn lithium content. PZB glasses are stable, IR spectra of these glasses show characteristics band originating from borate groups namely BO3 BO4and B-O-B stretching vibrations respectively, and found that structure is not affected with effect of lithium content. Refractive index of these glasses are in the range of 1.47 with increasing lithium content refractive index decreases indicating decrease in scattering of light. © 2012 American Institute of Physics

Glass Material and Their Advanced Applications

The present review summarizes the progress made in the area of glass science and also propose new definition of glass. The applications of glasses in everyday life and especially glasses used for light emitting devices, optical displays, optical fibers, amplifiers, lasers which are of special interest. Among these materials rare earth ions doped glasses are of great important to optoelectronics and are widely used in optical fiber amplifiers and solid state high power lasers for telecommunications and light emitting diodes. Optical fiber revolutionized the glass industry and is been used as sensing applications which depends upon light wavelength, fiber parameters, fiber geometry, and metal layer properties. Even smart glasses play a vital role in the medical field

Optical and radiative properties of Nd3+-doped lead tellurite borate glasses

Glass samples of composition (in mol) 20PbO-20TeO2-(60-x)B 2O3-xNd2O3 (x = 0, 1, 2, 3, 4) were prepared by melt quenching. The glassy nature of as-quenched samples was established via differential scanning calorimetry. The amorphous nature of the glasses was confirmed via powder X-ray diffraction measurements. Judd-Ofelt (JO) analysis based on UV-visible absorption spectra was performed to determine JO parameters Ωλ (λ = 2, 4, 6). The observed trend is Ω2 > Ω6 > Ω4. The large value of Ω2 indicates the presence of covalent bonding between the Nd3+ ions and the surrounding ligands. Radiative properties, such as radiative transition probabilities, branching ratios, and radiative lifetimes are estimated. The glass samples have relatively high branching ratio, and their emission (Aem) to excited state absorption (AESA) intensity ratio is higher than one for the 4F 3/2 â 4I11/2 transition, indicating that the prepared glasses may have potential laser applications. © 2013 Published by NRC Research Press

Optical properties of Pb0-ZnO-P2O5 glasses doped with samarium and neodymium

(PbO) 30(ZnO) 20(P 2O 5) 50-x(Nd 2O 3) x and (PbO) 30(ZnO) 20(P 2O 5) 50-x(Sm 2O 3) x glasses (where x=0.5, 1, 2%) have been prepared by conventional melt quenching method. Measurements of X-ray diffractrogram reveal samples prepared are amorphous in nature, DSC studies have been made and the glass transition temperature (T g), crystallization temperature (T c) and glass stability factor have been evaluated. These glasses exhibit high transition temperature (T g) and high stability factor (S) indicating glasses are stable. IR spectra of these glasses show absorption peaks at 1215cm -1, 1072cm -1 and 728cm -1 corresponding to P=O, P-O-P and P-O - vibrations. Optical absorption studies show absorption peaks in the range of 462.5-584 nm for various transition in the Nd 3+ ion and 287.5-562.5 nm in case Sm 3+. © 2011 American Institute of Physics

Optical properties of Eu3+ doped lead borate tellurite and zinc borate tellurite glasses

This paper describes the synthesis and optical absorption studies of the glass system 20PbO-20TeO2-(60-x)B2O3-xEu 2O3 (x=0,1mol) and 20ZnO-20TeO2-(60-x)B 2O3-xEu2O3 (x=0,1mol). These glass systems have been successfully prepared by the melt quenching technique. The X-ray diffractograms show broad peaks indicating glasses are amorphous. DSC thermograms show glass transition temperatures around 655K for PbO content and around 675 K for ZnO content glass samples. In the UV-Visible spectra, several absorption lines are observed. The absorption peaks are around 362, 375, 393 and 464 nm for both Eu3+ doped PbO and ZnO content glass systems. These correspond to transitions from ground state of 7F0 to the excited state of 5D4, 5G4, 5L6 and 5D2 respectively for both Eu3+ doped PbO and ZnO content glass systems. These glasses are expected to give interesting applications in the area of optical devices. © 2011 American Institute of Physics