Structural, thermal, optical and photo-luminescent properties of barium tellurite glasses doped with rare-earth ions

Kaur, Amarjot; Khanna, Atul; Александров, Л. Н.

doi:10.1016/j.jnoncrysol.2017.09.025

Cited by 67 publications

(28 citation statements)

References 66 publications

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“…The glasses were annealed for 2 h at 20°C below than the glass transition temperature to release the mechanical strains. The transformation temperature was based on literature data [3,30,41].…”

Section: Methodsmentioning

confidence: 99%

“…The intensity of the band at around 630 cm -1 and 680 cm -1 increased with addition and increase in BaO content in the base glass, as expected, since there are lower Te-O-Te linkages. This means that more non-bridging units are formed in the tellurite-phosphate network [30,53,54]. The addition of barium oxide contributed to a decrease in the intensity of the bands at around 930 cm -1 , 985 cm -1 and an increase in the intensity of the band at 1048 cm -1 .…”

Section: Ftir Spectroscopy Studymentioning

confidence: 97%

“…For a sodium-tellurite composition, the highest value of Hrubby parameter was found for 20 mol% of Na 2 O, which is why this composition was modified by incorporating 10 mol% ZnO [40]. According with Kaur et al [30], as the concentration of BaO increases in xBaO-(100-x)TeO 2 (where x = 10, 15 and 20 mol%) from 10 to 20 mol%, the value of DT decreases from 140°C to 100°C. Therefore, the thermal stability of glasses against crystallization decreases.…”

Section: Introductionmentioning

confidence: 99%

“…This is a unique structural characteristic of TeO 2 glass, distinct from other network-forming glasses; e.g., silicates, phosphates and germanates in which only the NBO and bridging oxygen exist as a part of the structural unit [5,16,[26][27][28][29]. Modifiers such as BaO and ZnO break the random network of glasses, and the concentration of TeO 3 and TeO 3?d units increases [30]. An extensive list of tellurite glass compositions with glass-forming ranges is reported in literature [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Influence of barium oxide on glass-forming ability and glass stability of the tellurite–phosphate oxide glasses

Leśniak

Szal

Starzyk

et al. 2019

J Therm Anal Calorim

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The effect of BaO content on the glass-forming ability, glass stability and structure of tellurite-phosphate oxide glasses in the 70TeO 2-10P 2 O 5-(20-x)ZnO-xBaO (x = 0, 5 and 10 mol%) system has been discussed. From the differential scanning calorimetry, the glass transition (Tg), crystallization (Tc) and the melting (Tm) temperatures were estimated. The decrease in reduced glass transition temperature (Tr g) and glass-forming tendency parameter (K h (Tc 1)) with addition and increasing BaO caused a decrease in the glass-forming ability of glasses. It was also found that the thermal stability of these glasses against crystallization decreased with increase in BaO concentration into chemical composition of base glass, i.e., glass without barium oxide. The FTIR spectra were measured to understand the structure of the obtained tellurite-phosphate oxide glasses. The results have shown that phosphorous and tellurium ions were taken part in the formation of the glass network of the studied glasses. The addition of BaO caused significant changes in the FTIR spectra of glasses. More and more TeO 3 and TeO 3?d units and PO 4 2groups (Q 1 units) were created when the BaO was added into the chemical composition of the base glass. Increasing barium ions content into the chemical composition of glasses caused depolymerization of the tellurite-phosphate oxide glass network. Keywords Tellurite-phosphate oxide glasses Á BaO Á Glass-forming stability Á Glass stability Á Structure

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Section: Methodsmentioning

confidence: 99%

Section: Ftir Spectroscopy Studymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of barium oxide on glass-forming ability and glass stability of the tellurite–phosphate oxide glasses

Leśniak

Szal

Starzyk

et al. 2019

J Therm Anal Calorim

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“…Among the number of rare earth (RE) ions used in the areas of optical fibres, optoelectronic and lasers, Er 3+ ions are found to be more suitable for optical signal amplifiers and sometimes laser applications and whitelight emitting devices [13]. Since Er 3+ ions in glasses possesses two useful emission bands around 1500 nm and 2700 nm, the former is utilized in the EDFA and the 2700 nm band is utilized in medicine and optical sources for sensors [14].…”

Section: Introductionmentioning

confidence: 99%

Structural, elastic and thermo-physical properties of Er2O3 nanoparticles doped bio-silicate borotellurite glasses

et al. 2020

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This paper presents a study on the structural, morphological and elastic properties of erbium oxide nanoparticles doped bio-silicate borotellurite glass system fabricated using the technique of melt-quenching with chemical compositional formula {[(TeO 2 ) 0.7 (B 2 O 3 ) 0.3 ] 0.8 (SiO 2 ) 0.2 } 1−y (Er 2 O 3 NPs) y where 0.01 ≤ y ≤ 0.05. The objective of the work was to study the some elastic and thermal parameters associated with non-destructive ultrasonic technique, with the aim of utilizing the glasses for erbium doped fiber amplifier application. Various measurements and Characterizations techniques which includes density and molar volume measurements, energy dispersive X-ray fluorescence, X-ray diffraction (XRD), Fourier transform infrared (FTIR), Transmission electron microscopy and Pulse-echo technique were carried out in this study. The density values for the glasses increased from 4.1900 to 4.6003 gcm −3 with the addition of 1-5% of Er 2 O 3 NPs in the glass structure. The increase can be ascribed to increase in the overall molar weight of the glass due to incorporation of heavy Er 3+ ions. The XRD patterns revealed no presence of sharp peaks with the observed broad hump around 2θ = 20-30° indicating the glassy and amorphous nature of the studied glasses. The FTIR spectra showed absorption with peaks around 1362-1385 cm −1 , 1221-1250 cm −1 , 655-689 cm −1 and 602-630 cm −1 wave number ranges, indicating the presences of H 3 BO 3 , SiO 4 , BO 3 , TeO 3 and TeO 4 structural units in the glass system. The microstructural nature observed in the glass morphology showed nanoparticle agglomerations in the glasses. The ultrasonic velocities, elastic moduli, microhardness, Poisson ratio, softening and Debye's temperatures, thermal expansion coefficient as well as other important parameters were calculated from the density and ultrasonic data. The values of the ultrasonic velocities, elastic moduli, Debye's temperature, softening temperature, thermal expansion coefficient and the acoustic impedance increased with increase in the Er 2 O 3 NPs concentration.

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Investigation of Dysprosium‐Incorporated Potassium Boro‐Tellurite Glasses Toward Radiation Screening and Photonic Applications

Sharma

Verma

Kaur

2023

Physica Status Solidi (a)

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A series of quaternary tellurite‐based glasses (72−x)TeO2 + 25B2O3 + 3K2CO3 + xDy2O3, where (x = 0, 0.5, 1, 1.5, 2, 2.5), are prepared using melt quenching technique. The effect of dopants on structural, physical, optical, and thermal properties of alkali boro‐tellurite glasses are studied using the differential thermal analysis (DTA) technique, UV–vis spectrometer, and photoluminescence technique. The density of as‐prepared samples has been obtained using the conventional Archimedes principle and other physical parameters, viz. molar volume and ion concentration, are also calculated using density. The optical absorption spectra exhibits different excited states of Dy3+ corresponding to 6H15/2→ 6F5/2(∼805 nm), 6F3/2(∼755 nm), 4F9/2 (∼473 nm), 4I15/2 (∼454 nm), 4G11/2 (∼427 nm), 4F7/2(389 nm), 4P3/2(∼366 nm). With the increase in Dy+3 concentration, an increase in optical bandgap, density, and molar volume as well as decrease in molar reflectivity, and reflection loss is evident from this study. The effect of Dy+3 ion concentration on Y/B intensity ratios and CIE chromaticity coordinates have been evaluated to understand the possible applications of aforementioned glass samples for white‐light‐emitting diodes (WLEDs). Moreover, various shielding parameters, viz. half value layer (HVL), mean free path (MFP), effective atomic number (Z eff), mass attenuation coefficient (MAC) have also been determined to understand the shielding characteristics of as‐prepared glass samples.

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Structural, thermal, optical and photo-luminescent properties of barium tellurite glasses doped with rare-earth ions

Cited by 67 publications

References 66 publications

Influence of barium oxide on glass-forming ability and glass stability of the tellurite–phosphate oxide glasses

Influence of barium oxide on glass-forming ability and glass stability of the tellurite–phosphate oxide glasses

Structural, elastic and thermo-physical properties of Er2O3 nanoparticles doped bio-silicate borotellurite glasses

Investigation of Dysprosium‐Incorporated Potassium Boro‐Tellurite Glasses Toward Radiation Screening and Photonic Applications

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