Raman spectral studies of borate glasses

Meera, B.N.; Ramakrishna, J.

doi:10.1016/0022-3093(93)91277-a

Cited by 405 publications

(389 citation statements)

References 49 publications

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“…[12][13][14] For chalcogenide glasses, Raman scattering played a pivotal role in elucidating the molecular structures and identifying domains of intermediate phases. 15 Raman spectra from Na 2 O -CaO-MgO-Al 2 O 3 -SiO 2 system were interpreted in terms of structural alteration as the composition was altered from the binary end members to more complicated glasses.…”

Section: Introductionmentioning

confidence: 99%

Network structure and thermal stability study of high temperature seal glass

Mahapatra

2008

Journal of Applied Physics

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Articles you may be interested inSynthesis and structural studies of multi-component strontium zinc silicate glass-ceramics AIP Conf. Proc. 1512, 568 (2013) High temperature seal glass has stringent requirement on glass thermal stability, which is dictated by glass network structures. In this study, a SrO-La 2 O 3 -Al 2 O 3 -B 2 O 3 -SiO 2 based glass system was studied using nuclear magnetic resonance, Raman spectroscopy, and x-ray diffraction for solid oxide cell application purpose. Glass structural unit neighboring environment and local ordering were evaluated. Glass network connectivity as well as silicon and boron glass former coordination were calculated for different B 2 O 3 : SiO 2 ratios. Thermal stability of the borosilicate glasses was studied after thermal treatment at 850°C. The study shows that high B 2 O 3 content induces BO 4 and SiO 4 structural unit ordering, increases glass localized inhomogeneity, decreases glass network connectivity, and causes devitrification. Glass modifiers interact with either silicon-or boron-containing structural units and form different devitrified phases at different B 2 O 3 : SiO 2 ratios. B 2 O 3 -free glass shows the best thermal stability among the studied compositions, remaining stable after thermal treatment for 200 h at 850°C.

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Section: Introductionmentioning

confidence: 99%

Network structure and thermal stability study of high temperature seal glass

Mahapatra

2008

Journal of Applied Physics

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“…A small but well-distinguished IR band at around 800 cm [9]. The width of the Raman bands in disordered materials is a measure of the disorder in the local structure [26]. The Raman band width decreases with decrease in bismuth content indicating that the vicinity of bismuth in the present glass system is more distorted.…”

Section: Resultsmentioning

confidence: 79%

Structural and Physical Properties of ZnO Modified Bismuth Silicate Glasses

et al. 2012

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Zinc bismuth silicate glasses with compositions 40SiO 2 · xZnO · (60 − x)Bi 2 O 3 (x = 0, 5, 10, 15, 20, 25, 30, 35, and 40) have been prepared by conventional melt-quench technique and the solubility limit of zinc in bismuth silicate glass system has been estimated using X-ray diffraction technique. Density has been measured using Archimedes' principle; with increase in ZnO in the samples, the molar volume and density are found to decrease. The glass transition temperature (T g ) has been determined by using differential scanning calorimetry (DSC) and is observed to increase with increase in ZnO content. Raman and FTIR spectra have been recorded at room temperature and the analysis of Raman and FTIR shows that in all the glass compositions, asymmetric and symmetric stretched vibrations of Si-O bonds in SiO 4 tetrahedral units exist and with decrease in Bi 2 O 3 , the contribution of symmetric vibrations begins to dominate which results in increased compactness of the glass structure.

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“…The peak around 776 cm ¹1 was assigned to the symmetric breathing vibration of six-membered rings with one BO 4 tetrahedron. 20) The peak around 806 cm ¹1 was assigned to the symmetric breathing vibration of boroxol rings. 20) The peak area ratio of the two peaks depended on the mole ratio of the alkali oxide in the alkali borate glasses and was determined by fitting with pseudo-Voigt functions and a line.…”

Section: Methodsmentioning

confidence: 99%

Soret coefficients of alkali oxides in alkali borate glass melts

Shimizu

Hanakawa

Nishi

et al. 2016

J. Ceram. Soc. Japan

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We measured the Soret coefficients of alkali oxides in binary alkali borate glass melts. The alkali borate glasses, 15(mol %)Li 2 O 85B 2 O 3 , 15Na 2 O85B 2 O 3 , and 15K 2 O85B 2 O 3 , were encapsulated in platinum capsules and heat-treated at 1000°C with a temperature gradient in a tube furnace. After the heat treatment, the compositional distribution of the glass sample was measured by Raman spectroscopy. The Soret coefficients of the alkali oxides Li 2 O, Na 2 O, and K 2 O increased with the atomic numbers of the alkali metal ions. This indicates that alkali oxides more easily have high concentration in cold regions as the atomic numbers of the alkali metal ions in the alkali oxides increase. This result provides new information about the diffusion properties in glass melts.

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Raman spectral studies of borate glasses

Cited by 405 publications

References 49 publications

Network structure and thermal stability study of high temperature seal glass

Network structure and thermal stability study of high temperature seal glass

Structural and Physical Properties of ZnO Modified Bismuth Silicate Glasses

Soret coefficients of alkali oxides in alkali borate glass melts

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