Quantitative study of the short range order in B2O3 and B2S3 by MAS and two-dimensional triple-quantum MAS 11B NMR

Contribution of first-principles calculations to multinuclear NMR analysis of borosilicate glasses

“…11 B MQMAS has now become the standard method for discriminating between the two boron species present in borosilicate glasses, [67] generally named as ring and non-ring. Indeed because of the strong overlap between the two corresponding lines in the 1 D MAS NMR spectrum constraints as provided by MQMAS [72] or DAS [73] are generally crucial to get an accurate quantification from fit of the MAS spectra. In this perspective recent methodologies such as MQDOR are very appealing.…”

Boria Effects on the High Temperature Oxidation of Silicon Carbide

“…A comparison of the vitreous and molten boria structures proposed by Hwang et al 48 and Mackenzie 56 are shown in Figure 100 A Further, Furukawa and White found that the Si-O-B bond formation was favored when B2O3-SiO2 glasses were heated 66 . Furukawa and White ascribed the formation of the Si-O-B bonds to the thermal decomposition of boroxol rings into planar triangles that bonded to Si through bridging oxygens.…”

“…The v-B2O3 structure has been under considerable debate [47][48][49][50] . Neutron diffraction experiments conducted by Hannon et al supported previous findings that the majority of B atoms make up planar B3O6 boroxol ring structural units and the remaining B atoms make up BO3 triangular structural units 47 .…”

Characterization of offretite during hydrothermal treatment by high-resolution solid-state29Si magic angle spinning NMR and27Al triple-quantum magic angle spinning NMR spectroscopy

“…8 The latter is very promising since it is technically more simple and it can provide, in addition to the impressively resolved spectrum, further information on the quadrupolar interaction. Among the beneficiaries of this technique, zeolite science (and in a more general way solid-state catalysis) sees in this method an accurate way of characterizing the state of the aluminium, 9 -11 boron 12 and the oxygen atoms, 13 or the cations. 14 In this work, we applied the MAS and MQMAS techniques to the study of 29 Si and 27 Al in a series of offretite * Correspondence to: J. B.Nagy, Laboratoire de Résonance Magnétique Nucléaire, Facultés Universitaires Notre-Dame de la Paix, B-5000 Namur, Belgium.…”