Alkali and alkaline earth zinc and lead borate glasses: Structure and properties

Heuser, Lina; Nofz, Marianne

doi:10.1016/j.nocx.2022.100109

Cited by 5 publications

(5 citation statements)

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“…The chemical compositions of NZB, Ag0.5NZB, and Ag5NZB were analyzed by inductively coupled plasma‐optical emission spectrometry (ICP‐OES 5100, Agilent Technologies, Waldbronn, Germany) on the basis of DIN 51086‐2 25 . The analyzed glass composition (mol%) of NZB amounts to 19.9Na 2 O–26.4ZnO–53.7B 2 O 3 being thus close to the target composition 26 . Parts of Ag0.5NZB and Ag5NZB samples were analyzed where no metallic silver precipitates were visible.…”

Section: Methodsmentioning

confidence: 84%

“…Raman spectra of NZB, 26 Ag0.5NZB, and Ag5NZB glasses (A). All curves were baseline corrected, normalized with respect to their maximum intensity at ≈ 770 cm −1 , and staggered for better clarity.…”

Section: Resultsmentioning

confidence: 99%

“….9Na 2 O-26.4ZnO-53.7B 2 O 3 being thus close to the target composition 26. Parts of Ag0.5NZB and Ag5NZB samples were analyzed where no metallic Target glass composition (mol%), batch size (g), crucible material, and the experiments made on each…”

mentioning

confidence: 99%

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Silver dissolution and precipitation in an Na₂O–ZnO–B₂O₃ metallization paste glass

Heuser

Nofz

Müller

et al. 2022

Int J of Appl Glass Sci

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Thermally stimulated interactions between silver and glass, that is, silver dissolution as Ag + and precipitation as Ag 0 were studied in two glass series of molar target composition xAg 2 O-(19 − x)Na 2 O-28ZnO-53B 2 O 3 with x = 0, 0.1, 0.5, 5 and (19Na 2 O-28ZnO-53B 2 O 3 )+yAg 2 O with y = 0.01, 0.05. These act as model for low-melting borate glasses being part of metallization pastes. The occurrence of metallic silver precipitates in melt-quenched glass ingots demonstrated that silver dissolved only in traces (< 0.01 mol%) in the glasses. The dissolved silver was detected by means of Raman spectroscopy and energy-dispersive X-ray spectroscopy. Increasing x in the batch could not lead to a significant increase of the silver ion fraction in the glass as possible in binary silver borate glasses. In situ observation of heated AgNO 3 mixed with the base glass frit in a hot stage microscope showed that Ag 0 precipitation occurs already at the solid state. At higher temperatures, small droplets of liquid silver were found to move freely within the melt, whereas coalescence caused a stepwise increase of their size.These results contribute to the understanding of formation of silver precipitates in metallization pastes described in the literature.

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Section: Methodsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

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Silver dissolution and precipitation in an Na₂O–ZnO–B₂O₃ metallization paste glass

Heuser

Nofz

Müller

et al. 2022

Int J of Appl Glass Sci

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“…The properties of borate glasses make it a good candidate for several applications such as optical communication, optoelectronics, radiation shielding, dosimeters and electrochemical devices [7][8][9]. The addition of alkaline earth oxides such as CaO, SrO and BaO, changes the glass structure and the relative intensities of BO 4 /BO 3 units, hence changing glass properties [10][11][12][13][14]. It is known that modifying borate network with alkaline earth ions helps increasing the mechanical, thermal stability and radiation shielding properties of borate glasses [15].…”

Section: Introductionmentioning

confidence: 99%

Physical, optical, thermal, structural and mechanical properties of alkaline earth borate glasses

Elkholy,

Atif,

Aslam

et al. 2024

Phys. Scr.

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Binary alkaline earth borate glasses were synthesized via the melt quenching technique. The density and molar volume of the resultant glasses were determined experimentally. The glass optical basicity has been found to increase with the glass polarizability. The optical properties of the glasses were comprehensively analyzed, revealing a shift in the cutoff wavelength towards longer wavelengths with increasing glass optical basicity. Additionally, the optical band gap (Eg) was estimated. Structural investigations unveiled an increase in the abundance of BO4 units as the glass optical basicity increased. Furthermore, the glass transition temperature was observed to decrease with decreasing cation field strength. Glass packing density and B2O3 packing factor were calculated to assess structural variations. The longitudinal and shear velocities were determined using the pulse echo technique, providing insights into the elastic moduli of the glasses. The Makishima and Mackenzie approach was employed to predict the elastic moduli, yielding results in good agreement with experimental data. This comprehensive analysis sheds light on the relationship between composition, structure, and mechanical properties of binary alkaline earth borate glasses, offering valuable insights for potential applications.

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“…15 The supplementation of ZnO to both binary alkali or alkaline borate oxide glasses promote competition between various cations in the borateunits to compensate for the charge. 16 ZnO helps to improve optical properties of borate glasses including optical band gaps, second harmonic generation etc.…”

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confidence: 99%

Physical, Optical, and Spectroscopic Characteristics of Mixed Alkali Tetraborate Glasses RO–ZnO–Li₂B₄O₇-K₂B₄O₇: Impact of Alkaline Earth Oxides (R = Mg, Ca)

Sarap¹,

Md²,

M³

et al. 2023

ECS J. Solid State Sci. Technol.

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Alkali tetraborate glasses 10RO-30ZnO-xLi2B4O7-(60-x) K2B4O7 (R=Mg, Ca) with x varying from 0 to 60 mole% were synthesized by melt quenching approach at around 1150°C. Broad and peak less X-ray diffraction spectra confirmed the amorphous nature of synthesized glass samples. Physical and optical properties, namely density, molar volume, refractive index, optical band gaps, molar refractivity, and Urbach energy values, have been reported. The density of the present glass samples improved with increasing x mole% except at the presence of equal amounts of alkali oxides in the glass system. The molar volume decreased continuously with x mole%. Oxygen packing density increased with increasing x mole%. The optical energy band gap Eopt values with increasing lithium tetraborate in the glass composition have shown a downward trend, where are refractive index values shown upward. Fourier transform infrared and Raman studies revealed the variation of BO3 and BO4 units in the glasses with composition is marginal. EPR spectra of copper ions confirmed the existence of Cu2+ ions in the ground state dx2-y2 orbital (2B1g). The observed non-linear variations of various properties are attributed to the structural changes caused by mixed alkali effect.

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Alkali and alkaline earth zinc and lead borate glasses: Structure and properties

Cited by 5 publications

References 45 publications

Silver dissolution and precipitation in an Na₂O–ZnO–B₂O₃ metallization paste glass

Silver dissolution and precipitation in an Na₂O–ZnO–B₂O₃ metallization paste glass

Physical, optical, thermal, structural and mechanical properties of alkaline earth borate glasses

Physical, Optical, and Spectroscopic Characteristics of Mixed Alkali Tetraborate Glasses RO–ZnO–Li₂B₄O₇-K₂B₄O₇: Impact of Alkaline Earth Oxides (R = Mg, Ca)

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Alkali and alkaline earth zinc and lead borate glasses: Structure and properties

Cited by 5 publications

References 45 publications

Silver dissolution and precipitation in an Na2O–ZnO–B2O3 metallization paste glass

Silver dissolution and precipitation in an Na2O–ZnO–B2O3 metallization paste glass

Physical, optical, thermal, structural and mechanical properties of alkaline earth borate glasses

Physical, Optical, and Spectroscopic Characteristics of Mixed Alkali Tetraborate Glasses RO–ZnO–Li2B4O7-K2B4O7: Impact of Alkaline Earth Oxides (R = Mg, Ca)

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Silver dissolution and precipitation in an Na₂O–ZnO–B₂O₃ metallization paste glass

Silver dissolution and precipitation in an Na₂O–ZnO–B₂O₃ metallization paste glass

Physical, Optical, and Spectroscopic Characteristics of Mixed Alkali Tetraborate Glasses RO–ZnO–Li₂B₄O₇-K₂B₄O₇: Impact of Alkaline Earth Oxides (R = Mg, Ca)