11B NMR studies and structural modeling of Na2OB2O3SiO2 glasses of high soda content

Dell, W.J.; Bray, P. J.; Xiao, S.Z.

doi:10.1016/0022-3093(83)90097-2

Cited by 500 publications

(733 citation statements)

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“…The broad powder pattern on the left ͑12 ppm peak͒ and the narrow Gaussian curve on the right ͑0 ppm peak͒ can be readily assigned to BO 3 ͑trigonal boron species͒ 4 ratio is independent of B 2 O 3 : SiO 2 ratio at low modifier contents. 22 However, at high modifier concentrations that are characteristic of the SABS glasses studied here, the BO 3 :BO 4 ratio is expected to decrease at a rapid rate with B 2 O 3 content increase. 22 This structural scenario is consistent with the compositional evolution of the 11 B MAS NMR spectra shown in Fig.…”

Section: A Glass Structural Unit Environmentmentioning

confidence: 83%

“…22 However, at high modifier concentrations that are characteristic of the SABS glasses studied here, the BO 3 :BO 4 ratio is expected to decrease at a rapid rate with B 2 O 3 content increase. 22 This structural scenario is consistent with the compositional evolution of the 11 B MAS NMR spectra shown in Fig. 1.…”

Section: A Glass Structural Unit Environmentmentioning

confidence: 83%

“…For the SABS-15 glass, the 471 cm −1 peak is from the Q 3 units but may also have contribution from the bending mode of B-O-B, B-O-Si, and Si-O-Si linkages. 22 The 446 cm −1 peak is from the Q 4 units. The 517 and 583 cm −1 peaks are from BO 4 − units.…”

Section: B Glass Structural Unit Local Orderingmentioning

confidence: 99%

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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: A Glass Structural Unit Environmentmentioning

confidence: 83%

Section: A Glass Structural Unit Environmentmentioning

confidence: 83%

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Network structure and thermal stability study of high temperature seal glass

Mahapatra

2008

Journal of Applied Physics

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“…The same 6 wt% B203 addition to glasses with 12 and 15 wt% A120, resulted in respective improvement of 10 and 4 times. Boron oxide also improves glass durability by replacing the NBO bonds in the glass with BO bonds (Dell 1983). In the glasses with higher A120, contents, there were fewer LG-549…”

Section: In Borosilicate Glass System Without Calcium -L4mentioning

confidence: 99%

“…It should be emphasized that the reaction of boron oxide, in trigonal configuration with alkali to form the BO bond of tetrahedral boron, is usually far fiom complete (Dell 1983). The additional 3 wt% boron oxide beyond 6 wt% made no improvement in durability; the addition of B,O, beyond 9 wt% made the glass less durable.…”

Section: L6-3312mentioning

confidence: 99%