Mixed alkali effect in physical and optical properties of Li2O–Na2O–WO3–B2O3 glasses

Edukondalu, Avula; Purnima, M.; Srinivasy, Ch.; Sripathi, T.; Awasthi, A. M.; Rahman, Syed; Kumar, K. Siva

doi:10.1016/j.jnoncrysol.2012.06.004

Cited by 42 publications

(3 citation statements)

References 67 publications

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“…This irregular behaviour was also shown in study by [24, 17, and 22]. The increase in molar volume resulted from the creation of non-bridging oxygen (NBOs) that will break the bonds and increases the glass network space [3]. Besides, it also results in the expansion in the bond length or in the interatomic spacing between the atoms [4].…”

Section: Physical Propertiesmentioning

confidence: 67%

Physical, Mechanical and Structural Properties of Yttrium Oxide Doped Zinc Borate Glasses

Afrizal

Yahya

Yusoff

et al. 2020

SSP

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In this project, the nominal glass composition with the form of (55-x) H3BO3-45ZnO-xY2O3 (x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol%) are synthesized by melt quenching techniques. The effect of Y2O3 on physical, mechanical and structural properties of glasses have been investigated using different characterization techniques. The parameters like density, molar volume and oxygen packing density have been calculated. Based on the micro hardness study, it has showed the decreasing trend from 518.80 N.mm-2 to 453.13 N.mm-2 with an increasing of Y2O3 content from 0.0 mol% to 2.5 mol%. The structural features of the yttrium oxide doped zinc borate glass were studied via X-Ray Diffraction (XRD) to confirm the amorphous nature of glass and Fourier Transforms Infrared Spectroscopy (FTIR) has been done to obtain the band positions and functional groups. FTIR spectral studies were recorded in the 400-4000 cm-1 wavenumber range at room temperature.

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Section: Physical Propertiesmentioning

confidence: 67%

Physical, Mechanical and Structural Properties of Yttrium Oxide Doped Zinc Borate Glasses

Afrizal

Yahya

Yusoff

et al. 2020

SSP

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“…Details of the preparation and characterization of the glass specimens are given in ref. [5]. The room temperature Raman measurements were performed in the range 100-2000 cm −1 on a micro Raman system from Jobin-Yvon Horiba (LABRAM HR-800) spectrometer.…”

Section: Expermentalmentioning

confidence: 99%

Raman spectroscopic studies on mixed alkali borotungsten glasses

Edukondalu¹,

Srinivasu²,

Rahman³

et al. 2014

AIP Conference Proceedings

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Raman, Brillouin, and nuclear magnetic resonance spectroscopic studies on shocked borosilicate glass Raman spectroscopic investigation of the structure of silicate glasses. IV. Alkali-silico-germanate glasses J. Chem. Phys. 95, 776 (1991); 10.1063/1.461084 Raman spectroscopic study of nitrate glasses J. Chem. Phys. 69, 2639 (1978); 10.1063/1.436912 Raman spectroscopic investigation of the structure of silicate glasses. I. The binary alkali silicates AbstractMixed alkali borate glasses of composition xLi 2 O-(30-x)K 2 O-10WO 3 -60B 2 O 3 (0 ≤ x ≤ 30 mol%) were prepared by melt quench technique. The structure of present glass system was investigated by Raman spectroscopy. The characteristic bands of these glasses due to the stretching and bending vibrations were identified and analyzed by the increasing of alkali content. This fact allowed us to identify the specific structural units which appear in these glasses and thus to point out the network modifier role of alkali oxide for low concentrations and its former role at high concentrations

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“…Borates are important components for commercial glass and also show MAE [5,[12][13][14], where the coordination number (CN) of B depends on the concentration of the alkali oxide [15]. As is well known, the CN of B gradually changes from three to four with increasing alkali oxide content.…”

Section: Introductionmentioning

confidence: 99%

Local structure of alkalis in mixed-alkali borate glass to elucidate the origin of mixed-alkali effect

Tokuda

Takahashi

Masai

et al. 2015

Journal of Asian Ceramic Societies

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We report the structural analysis of Na + and Cs + in sodium cesium borate crystals and glasses using 23 Na and 133 Cs magic-angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy. The composition dependence of NMR spectra of the borate was similar to that of the silicate: (1) the peak position of cesium borate crystals shifted to upfield for structures with larger Cs + coordination numbers, (2) the MAS NMR spectra of xNa 2 O-yCs 2 O-3B 2 O 3 (x = 0, 0.25, 0.5, 0.75, 1.0, x + y = 1) glass showed that the average coordination number (CN) of both the alkali cations decreases with increasing Cs + /(Na + + Cs +) ratio. However, the degree of decrement in borates is much smaller than that in silicates. We have considered that the small difference in CN is due to 4-coordinated B, because it is electrically compensated by the alkali metal ions resulting in the restriction of having various coordinations of O to alkali metal.

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Mixed alkali effect in physical and optical properties of Li2O–Na2O–WO3–B2O3 glasses

Cited by 42 publications

References 67 publications

Physical, Mechanical and Structural Properties of Yttrium Oxide Doped Zinc Borate Glasses

Physical, Mechanical and Structural Properties of Yttrium Oxide Doped Zinc Borate Glasses

Raman spectroscopic studies on mixed alkali borotungsten glasses

Local structure of alkalis in mixed-alkali borate glass to elucidate the origin of mixed-alkali effect

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