Influence of BaX2 (X = Cl, F) and Er2O3 concentration on the physical and optical properties of barium borate glasses

Martins, Ana Luiza; Feitosa, Carlos Alberto Carneiro; Santos, W.Q.; Jacinto, Carlos; Santos, Clenilton Costa dos

doi:10.1016/j.physb.2019.01.038

Cited by 30 publications

(9 citation statements)

References 44 publications

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“…2. The addition of Yb 2 O 3 with ascending ratios increases the density of the glasses from 3.652 to 3.761 g/cm 3 due to the replacement of the lighter mass content B 2 O 3 , TiO 2 , and BaO by the heavier mass content Yb 2 O 3 [4]. Moreover, replacing the oxides of boron, titanium, and barium with ytterbium oxide increases the number of oxygen ions within the glass matrix, which promotes the conversion of triangular BO 3 units to tetrahedral BO 4 units, and because the density of BO 4 units is greater than that of BO 3 units, this conversion promotes an increase in the density of the glass [21,22].…”

Section: Density and Molar Volumementioning

confidence: 99%

“…Alkali/alkaline earth borate glasses doped with transition metal elements, rare earth elements or both attracted the interest of researchers due to the importance of these glasses in developing many technological applications such as solid-state lasers, solar energy converters, optical fibers, and electronic devices [1][2][3]. Barium borate glasses have acquired great importance due to their unique optical properties, low melting point, high thermal and mechanical stability, and good solubility of rare earth ions as well as transition metals [4][5][6]. The fundamental structural units of borate-based glasses are trigonal BO 3 and tetrahedral BO 4 which can combine to form different structural groups such as diborates, tetraborates, orthoborates, pentaborates, metaborates, and boroxol rings.…”

Section: Introductionmentioning

confidence: 99%

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Structural and optical properties of barium titanium borate glasses doped with ytterbium

Marzouk

Azooz

Elsaghier

et al. 2022

J Mater Sci: Mater Electron

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Barium titanium borate glasses doped with ytterbium ions were fabricated via standard melt quenching technique. The building structure of the glass matrices doped with ascendant ratios of ytterbium ions were studied using Raman and FTIR spectroscopies. The UV–Vis–NIR optical absorption spectra were investigated and used to calculate optical bandgaps, Urbach energies, refractive indices, metallization criterion, optical basicity, and dispersion parameters. The absorption and emission cross-sections and gain spectra for 2F5/2 → 2F7/2 transition of ytterbium ions were investigated. The high values of the emission cross-sections of the studied glasses make them strong candidates for laser and amplifier applications.

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Section: Density and Molar Volumementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural and optical properties of barium titanium borate glasses doped with ytterbium

Marzouk

Azooz

Elsaghier

et al. 2022

J Mater Sci: Mater Electron

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“…c, d, e). Some of the well-formed crystalline phases, such as crystalline apatite (calcium phosphate crystals), are categorized as bioactive phases that are useful for the material to be used in the eld of biodental and bioactive use [19][20][21][22][23][24][25][26].…”

Section: Microhardnessmentioning

confidence: 99%

Structural role of Nd2O3 as a dopant material in modified borate glasses and glass ceramics

Shaalan

El-Damrawi

Hassan

et al. 2021

J Mater Sci: Mater Electron

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Glasses in the system xNd 2 O 3 -(46-x)B 2 O 3 -27CaO-24.4Na 2 O-2.6 P 2 O 5 (0 ≤ x ≤ 4 mol%) have been prepared via conventional melt quenching technique. X-ray diffraction (XRD) spectra have showed that the amorphous structure is dominant in glasses of Nd 2 O 3 concentrations ≤ 0.5 mol%. But formation of a more ordered structure is con rmed at higher Nd 2 O 3 values. Result based on differential scanning calorimetry (DSC) shows an increase in glass transition temperature (T g ) with increasing Nd 2 O 3 at expense of B 2 O 3 contents. Vicker hardness (H v ) and density (D) are used to correlate the glass structure with its properties. The measured density is found to be increased whereas the molar volume is decreased with increasing Nd 2 O 3 content. The calculated molar volume (V m ) and free spaces (V f ) are both decreased due to lling process which is suggested to be carried out by Nd 3+ of larger size than that of B 3+ . Decreasing of V m and V f can re ect the increase in bridging bonds in the glass network which in turns results in increasing of both T g and of the investigated compositions.

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“…Among the different oxide components, such as SiO 2 , GeO 2 or P 2 O 5 , successfully used for glass synthesis, B 2 O 3 is the best glass-former, which makes glass with high chemical durability and thermal stability, good transparency and rare earths solubility. Moreover, borate-based glasses mixed with different modifier oxides [11] and halides [12] have attractive optical and structural properties. These materials containing B 2 O 3 are promising systems for optoelectronic devices, lasers and white light applications [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Lead Borate Glasses and Glass-Ceramics Singly Doped with Dy3+ for White LEDs

Górny¹,

Kuwik²,

Pisarski³

et al. 2020

Materials

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In this paper, some series of lead borate glasses and glass ceramics singly doped with Dy3+ ions were prepared and then studied using spectroscopic techniques. Our research includes mainly studies of the luminescence properties of received materials for white light. The luminescence bands associated with the characteristic 4F9/2→6H15/2 (blue), 4F9/2→6H13/2 (yellow) and 4F9/2→6H11/2 (red) transitions of trivalent dysprosium in lead borate systems are well observed. In particular, the Commission Internationale de I’Eclairage (CIE) chromaticity coordinates (x, y) were calculated in relation to potential applications for white light-emitting diodes (W-LEDs). Their values depend on the relative B2O3/PbO ratios and PbX2 contents (where X = Cl, F, Br) in glass composition. For glass-ceramics, the chromaticity coordinates are changed significantly under different excitation wavelengths.

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Influence of BaX2 (X = Cl, F) and Er2O3 concentration on the physical and optical properties of barium borate glasses

Cited by 30 publications

References 44 publications

Structural and optical properties of barium titanium borate glasses doped with ytterbium

Structural and optical properties of barium titanium borate glasses doped with ytterbium

Structural role of Nd2O3 as a dopant material in modified borate glasses and glass ceramics

Lead Borate Glasses and Glass-Ceramics Singly Doped with Dy3+ for White LEDs

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