IR and UV spectral studies for rare earths-doped tellurite glasses

El-Deen, L.M. Sharaf; Salhi, M.S. Al; Elkholy, M. M.

doi:10.1016/j.jallcom.2007.10.104

Cited by 137 publications

(41 citation statements)

References 29 publications

(24 reference statements)

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“…Hence, the scattering centers and scattering loss are also increased and this fact once again confirms the decrease in optical band gap of the glass-ceramic samples. Besides, the shifting of optical band gap were more likely related to structural rearrangements of the glass and relative concentrations of various fundamental units [39]. The movement of absorption band to a lower energy was due to increasing of NBO's in the glass matrix after increasing of heat treatment temperature.…”

Section: Uv-vis Analysismentioning

confidence: 98%

Synthesis and characterization of low cost willemite based glass–ceramic for opto-electronic applications

Zaid

Aziz

Kamari

et al. 2016

J Mater Sci: Mater Electron

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This paper presents a comprehensive study on thermal, structural and optical properties of novel willemite glass-ceramics. The precursor glass in the ZnO-SLS glass system was successfully prepared using conventional meltquenching technique and willemite (Zn 2 SiO 4 ) glass-ceramics were derived from this precursor glass by a control crystallization process. The effect of heat-treatment temperature on the phase transformation, morphology and size of Zn 2 SiO 4 crystal phase was examined using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) techniques. Furthermore, fourier transform infrared reflection (FTIR) spectroscopy was used to evaluate the Zn 2 SiO 4 crystal structural evolution. The average size of Zn 2 SiO 4 crystallite obtained from calculation of XRD is found to be in the range 30-60 nm, whereas the grain size observed in FESEM is in range of 200-400 nm. The appearance of SiO 2 , ZnO 4 and Zn-O-Si bands detected from FTIR indicate the formation of Zn 2 SiO 4 crystal phase. Besides, the study of the optical band gap has found that optical band gap of the glass-ceramics decreased as the heat treatment temperature increased. The photoluminescence spectra of willemite glass-ceramics exhibit two different emissions around 525 nm (green) and 585 nm (yellow); exhibit a characteristic of broad absorption band around 260 nm. These two different spectra reveal that the luminescence performance of the willemite glass-ceramics was enhanced with the progression of heat treatment temperature due to different located energy levels of the b-Zn 2 SiO 4 and a-Zn 2 SiO 4 crystalline phase. Such luminescent glass-ceramics was expected to find potential applications in phosphors and opto-electronic devices.

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Section: Uv-vis Analysismentioning

confidence: 98%

Synthesis and characterization of low cost willemite based glass–ceramic for opto-electronic applications

Zaid

Aziz

Kamari

et al. 2016

J Mater Sci: Mater Electron

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“…La 2 O 3 and CeO 2 doped TiO 2 glasses can change the optical gap and the width of localized states [13]. La 2 O 3 films deposited by spray pyrolysis method are photoactive, and La 2 O 3 based borate glasses with various visible emissions are useful for developing new color light sources, fluorescent display devices, UV-sensor and tunable visible lasers [14,15].…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence enhancement induced by nanoparticles from La2O3 and CeO2 doped diamond-like carbon films

Zhang

Zhou

Guo

et al. 2009

Journal of Alloys and Compounds

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“…The positions of the most important absorption bands evidenced in the FT-IR spectra and their assignments are summarized in Table 1. The assignments were made based on data from the literature concerning some related vitreous or crystalline compounds [19][20][21][22][23][24][25][26][27][28][29].…”

Section: Resultsmentioning

confidence: 99%

Structural and physical characteristics of CeO2–GeO2–PbO glasses and glass ceramics

Culea

Pop

Bosca

2010

Journal of Alloys and Compounds

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IR and UV spectral studies for rare earths-doped tellurite glasses

Cited by 137 publications

References 29 publications

Synthesis and characterization of low cost willemite based glass–ceramic for opto-electronic applications

Synthesis and characterization of low cost willemite based glass–ceramic for opto-electronic applications

Photoluminescence enhancement induced by nanoparticles from La2O3 and CeO2 doped diamond-like carbon films

Structural and physical characteristics of CeO2–GeO2–PbO glasses and glass ceramics

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