The chemistry of simple ceramic glazes—III. A MASNMR study of simulated feldspars and their reactions with CaO, SrO, BaO or Li2O on heating to 1300°C

Mandair, Arvind; McWhinnie, William R.

doi:10.1016/s0277-5387(00)83547-0

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…Forcing water into an albite melt at high pressure and then quenching surprisingly caused no network depolymerization although the 27A1 NMR linewidth did decrease with increasing water content indicafing a reduction in Cq [203]. Addition of CaO, Li20, BaO and SrO to synthetic albite glasses induced ordering of the glass, and, at > 80 mol% CaO caused crystaUization and phase separation [204].…”

Section: Aluminosilicate Glasses Gels and Fibresmentioning

confidence: 96%

Application of27Al NMR techniques to structure determination in solids

1993

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Abstraer. There have been great improvements in the quality of 27A1 NMR spectra from solids over the last decade. The impact of this technique on structure determination fora wide range of solids is briefly reviewed. Emphasis is placed on the effects arising from the presence of the quadrupolar interaction and strategies that allow unambiguous spectral interpretation. It is demonstrated that in addition to the chemical shift, the quadrupolar interaction itself can be a rich source of local information about solids. The insight obtalned from 27A1 NMR hato atomic level structure often contains surprises, such that previous models of structure and properties have to be reassessed.

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Section: Aluminosilicate Glasses Gels and Fibresmentioning

confidence: 96%

Application of27Al NMR techniques to structure determination in solids

1993

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“…The chemical shift of 104 ppm correspond to Q 4 (1Al). The peaks at around 89 to 90 ppm, could be assigned to Q 4 (3Al) indicating further ordering of the aluminosilicate network [23]. The peak of 70 ppm for G1 glaze can be assigned to Q 1 .…”

mentioning

confidence: 96%

“…The spectrum for glaze G1 has three Gaussian peaks, while two Gaussian peaks are necessary to simulate the spectra from glazes G2 and G3 as can be seen in figure 7. Standard glaze G0 gives a chemical shift of 96 ppm which could be assigned to Q 4 (2Al) site [23]. Alkali and alkaline earth aluminosilicate glasses generally show peaks that can be assigned to Q 4 (2Al) and Q 4 (3Al) sites [24].…”

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confidence: 99%

Structure property relations in multicomponent oxide systems with additions of TiO2 and ZrO2 for glaze applications

Atkinson¹,

Teoreanu²,

Mocioiu³

et al. 2010

Journal of Non-Crystalline Solids

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The influence of the additives (10 weight% rutile, anatase and zirconia) on the atomic scale structure and microstructure of a base glaze (60 wt% feldspar, 15 wt% quartz, 8 wt% kaolin, 12 wt% dolomite and 5 wt% zinc oxide) are investigated. The morphology and structure of the glazes were determined by Scanning Electron Microscopy, X-ray diffraction, infra-red spectroscopy, as well as 27 Al and 29 Si magic angle spinning (MAS) NMR. Microscopy and X-ray diffraction revealed that the opacity was caused by crystals formed during thermal treatment. Although there are clearly crystalline phases present NMR shows that the heat treated glazes are dominated by the glassy component meaning the opacity is largely conveyed by the added oxide. The relationship between composition, structure and thermal expansion coefficient of the glazes is examined.

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ChemInform Abstract: Chemistry of Simple Ceramic Glazes. Part 3. A MASNMR Study of Simulated Feldspars and Their Reactions with CaO, SrO, BaO, or Li2O on Heating to 1300 °C.

Mandair

McWhinnie

1991

ChemInform

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1991 magnetic resonance, nuclear quadrupole resonance magnetic resonance, nuclear quadrupole resonance (solids and liquids) D 6560 -015Chemistry of Simple Ceramic Glazes. Part 3. A MASNMR Study of Simulated Feldspars and Their Reactions with CaO, SrO, BaO, or Li2O on Heating to 1300 • C. -As shown by 29Si, 27Al, and 23Na MASNMR spectroscopy, additions of CaO, SrO, BaO, or Li2O to synthetic albite glass (Na2O)(Al2O3)(SiO2)6 induce more ordering of the "SiO4", "AlO4" tetrahedra in the glass when present in greater (CaO ¿ 60 mol% relative to SiO2) or lesser ( Li2O ¿ 30 mol%) proportions. Addition of CaO in ¿ 80 mol% proportions encourages the crystallization of calcium silicate phases with concurrent formation of, essentially, sodium aluminate phases, whereas similar additions of SrO and BaO stabilize the glass phase. The 27Al MASNMR data also reveal that even low additions of CaO, SrO, and BaO cause Al to occupy an "AlO6" environment, while no octahedral Al is seen in the presence of Li2O. The apparent 23Na chemical shift generally moves to lower field with increasing proportion of "AlO4" in the glass. -(MANDAIR, A.-P. S.; MCWHINNIE, W. R.; Polyhedron 10 (1991) 1, 55-60; Dep. Chem. Eng. Appl. Chem., Aston Univ., Aston Triangle, Birmingham B4 7ET, UK; EN)

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The chemistry of simple ceramic glazes—III. A MASNMR study of simulated feldspars and their reactions with CaO, SrO, BaO or Li2O on heating to 1300°C

Cited by 3 publications

References 9 publications

Application of27Al NMR techniques to structure determination in solids

Application of27Al NMR techniques to structure determination in solids

Structure property relations in multicomponent oxide systems with additions of TiO2 and ZrO2 for glaze applications

ChemInform Abstract: Chemistry of Simple Ceramic Glazes. Part 3. A MASNMR Study of Simulated Feldspars and Their Reactions with CaO, SrO, BaO, or Li2O on Heating to 1300 °C.

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