Thermal study and linear optical properties of (1−x)TeO2–(x)PbF2 (x=0.10, 0.15 and 0.25mol) glasses

Kabalcı, İdris; Özen, G.; Öveçoğlu, M. Lütfi; Sennaroğlu, Alphan

doi:10.1016/j.jallcom.2005.09.062

Cited by 25 publications

(20 citation statements)

References 17 publications

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“…However, no Raman peak related to the PbTe 3 O 7 crystalline phase was observed with any appreciable intensity, which was determined from the respective XRD spectra and reported elsewhere. [34] Deconvoluted Raman spectra were obtained to investigate the effect of the modifier content on the network formation by using the symmetrical Gaussian function, and the fitted curves together with the measured spectra are shown in Fig. 2 modes as was explained by Pan and Morgan.…”

Section: Resultsmentioning

confidence: 99%

“…XRD [34] Raman (cm −1 ) First exotherm Second exotherm 293 424 613 682 813s -- δ-TeO 2 δ-TeO 2 δ-TeO 2 δ-TeO 2 α-TeO 2 -- Figure 3 represents the intensity ratio of each Raman peak determined from the respective deconvoluted Raman spectra and gives the information about the intensity changes in the TeO 2 -PbF 2 glasses with various PbF 2 contents. Because the intensity of the peaks D and A increases rapidly with increasing PbF 2 content, the number of Te-O-Te linkage increases, indicating an increase in network connectivity.…”

Section: Resultsmentioning

confidence: 99%

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Microstructure and crystallization properties of TeO₂PbF₂ glasses

Kabalcı

Özen

Öveçoğlu

2008

J Raman Spectroscopy

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The microstructures of (1 − x)(TeO 2 )-xPbF 2 , (x = 0.1, 0.15, and 0.25 mol) glasses were investigated by using the Raman spectroscopic technique. The effect of compositions on the TeO 2 glass networks and the intensity ratios of the deconvoluted Raman peaks were determined. The results confirm that the addition of modifiers to the glass network former shifts the Raman intensity and the peak wavenumber values for each band in the 167-165, 652-645, and 747-755 cm −1 wavenumber regions. The structural evaluation was recognized from the Raman spectra, with the structural units described as [TeO 3+1 ] polyhedra, [TeO 3 ] trigonal pyramids, and [TeO 4 ] trigonal bipyramids for this binary glass system. Heat-treatment of the samples shows that the metastable crystalline phase of TeO 2 known as γ -TeO 2 is formed only when the modifier content is 10 mol% in the glass matrix. Transparent glass properties were not realized when the TeO 2 amount was decreased to less than 10 mol% content.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Microstructure and crystallization properties of TeO₂PbF₂ glasses

Kabalcı

Özen

Öveçoğlu

2008

J Raman Spectroscopy

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“…3 Results and discussion 3.1 DTA investigations Differential thermal analysis (DTA) investigations were conducted on the as-cast GeO 2 -PbF 2 glasses to deduce the thermal behaviour of the lead germanate glasses with varying amounts of PbF 2 which is a network modifier [8,18]. DTA thermographs of three as-cast GeO 2 -PbF 2 glass samples were scanned between 200 and 900 °C at the heating rate of 10 °C/min.…”

Section: 3mentioning

confidence: 99%

Thermal and microstructural investigations of oxyfluoride lead germanate glasses

Elbizim

Tatar

Yılmaz

et al. 2011

Phys. Status Solidi C

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In this study, thermal behaviour and microstructural characterization of germanium rich GeO2–PbF2 binary glass system were investigated. The studies were conducted for 10, 20 and 30 mol% PbF2 contents. The thermal behaviour of oxyfluoride lead germanate glasses was studied using differential thermal analysis (DTA) at the heating rate of 10 °C/min, in air flow. Effects of different heating rates and PbF2 content were investigated on the glass transition, crystallization and melting temperatures. The structural investigations of as‐cast and annealed samples which are heat‐treated above crystallization peak temperatures were conducted using X‐ray diffractometry (XRD) and scanning electron microscopy (SEM). Utilizing these techniques, α‐GeO2, α‐PbGe4O9, γ‐PbGe4O9, PbGeO3 and Pb3GeO5 phases were identified. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Moreover, glass researchers have also expressed their intensive interest in the tellurite glasses for being one of the most important materials among the oxide glasses due to its several optical, physical and microstructural properties when compared with silicate and borate glasses like; wide transmission window in the infrared (0.35-5.0 μm), low melting temperature, low phonon cut-off energy (800 cm -1 ), and high refractive index (1.8-2.3) [4][5][6]. In addition, tellurite optical glasses are resistant to atmospheric moisture and capable of incorporating large concentrations of rare earth ions such as Tm 3+ ion into the glass matrix [7,8]. To understand the relationship between the microstructure and glass compositions, it is necessary to add into tellurite based glasses various glass modifiers with heavy metal oxides to change the non-linear optical response of tellurite glasses, and to improve the physical properties of tellurite optical glasses, where the hyperpolarizability of the Nb-O band induces high refractive index in glass which can be doped with different Nb 2 O 5 compositions [4].…”

Section: Introductionmentioning

confidence: 99%

Optical absorption and spectroscopic properties of thulium doped (TeO₂)(Nb₂O₅)(TiO₂) glasses

Kabalcı

Tay

Özen

2011

Phys. Status Solidi C

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A type of thulium doped tellurite based optical glasses was prepared through conventional melt quenching technique. In the experiments, the effect of different Tm3+ ion concentration and glass composition on optical properties of (TeO2)(1‐x‐y)(Nb2O5)(x)(TiO2)(y) (x=0.05, 0.10, 0.15, and 0.20 mol) glasses have been investigated by using UV‐VIS‐NIR optical spectrophotometry measurements in a wavelength range 400‐2000 nm. Considering absorption measurements for the 1.0mol% Tm3+ doped of (TeO2)0.9(Nb2O5)0.05(TiO2)0.05 glass, 1G4, 3F2, 3F3, 3F4, 3H5, and 3H4 absorption bands were observed from the 3H6 ground level, at 463, 660, 687, 793, 1211 and 1700 nm wavelengths, respectively. Furthermore, spontaneous emission probabilities, and the radiative lifetimes for the 4f‐4f transitions of the Tm3+ ions were calculated. The spectral intensities were determined in terms of Judd‐Ofelt parameters (Ω2, Ω4, Ω6). Luminescence analysis was realized for the different Tm3+ ion concentration (0.002, 0.005 and 0.01mol) at room temperature. The luminescence band intensity of the 3F4→3H4 transition was measured as a function of Tm3+ ion concentration (0.002, 0.005 and 0.01mol). Furthermore, luminescence data of the thulium doped glass samples were used to determine the compositional dependence of the emission cross sections at 1470 nm (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Thermal study and linear optical properties of (1−x)TeO2–(x)PbF2 (x=0.10, 0.15 and 0.25mol) glasses

Cited by 25 publications

References 17 publications

Microstructure and crystallization properties of TeO₂PbF₂ glasses

Microstructure and crystallization properties of TeO₂PbF₂ glasses

Thermal and microstructural investigations of oxyfluoride lead germanate glasses

Optical absorption and spectroscopic properties of thulium doped (TeO₂)(Nb₂O₅)(TiO₂) glasses

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Thermal study and linear optical properties of (1−x)TeO2–(x)PbF2 (x=0.10, 0.15 and 0.25mol) glasses

Cited by 25 publications

References 17 publications

Microstructure and crystallization properties of TeO2PbF2 glasses

Microstructure and crystallization properties of TeO2PbF2 glasses

Thermal and microstructural investigations of oxyfluoride lead germanate glasses

Optical absorption and spectroscopic properties of thulium doped (TeO2)(Nb2O5)(TiO2) glasses

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Product

Resources

About

Microstructure and crystallization properties of TeO₂PbF₂ glasses

Microstructure and crystallization properties of TeO₂PbF₂ glasses

Optical absorption and spectroscopic properties of thulium doped (TeO₂)(Nb₂O₅)(TiO₂) glasses