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Physical properties and MAS-NMR studies of titanium phosphate-based glasses

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Physical properties and MAS-NMR studies of titanium phosphate-based glasses. / Kiani, Azadeh; Cahill, Lindsay S.; Neel, Ensanya Ali Abou et al.
In: Materials Chemistry and Physics, Vol. 120, No. 1, 15.03.2010, p. 68-74.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Kiani, A, Cahill, LS, Neel, EAA, Hanna, JV, Smith, ME & Knowles, JC 2010, 'Physical properties and MAS-NMR studies of titanium phosphate-based glasses', Materials Chemistry and Physics, vol. 120, no. 1, pp. 68-74. https://doi.org/10.1016/j.matchemphys.2009.10.023

APA

Kiani, A., Cahill, L. S., Neel, E. A. A., Hanna, J. V., Smith, M. E., & Knowles, J. C. (2010). Physical properties and MAS-NMR studies of titanium phosphate-based glasses. Materials Chemistry and Physics, 120(1), 68-74. https://doi.org/10.1016/j.matchemphys.2009.10.023

Vancouver

Kiani A, Cahill LS, Neel EAA, Hanna JV, Smith ME, Knowles JC. Physical properties and MAS-NMR studies of titanium phosphate-based glasses. Materials Chemistry and Physics. 2010 Mar 15;120(1):68-74. doi: 10.1016/j.matchemphys.2009.10.023

Author

Kiani, Azadeh ; Cahill, Lindsay S. ; Neel, Ensanya Ali Abou et al. / Physical properties and MAS-NMR studies of titanium phosphate-based glasses. In: Materials Chemistry and Physics. 2010 ; Vol. 120, No. 1. pp. 68-74.

Bibtex

@article{e2070ca5b4024df5a632a7ec4478aa6e,
title = "Physical properties and MAS-NMR studies of titanium phosphate-based glasses",
abstract = "In this study, for a series phosphate-based glasses ((P2O5)0.45(CaO)0.3(Na2O)0.25−x(TiO2)x, 0 ≤ x ≤ 0.15), their degradation, ion release, surface and thermal properties have been determined. The results show that adding TiO2 was associated with a significant increase in density and glass transition temperature, but a decrease in degradation rate and ion release. 31P solid-state magic-angle-spinning nuclear magnetic resonance (MAS-NMR) showed that the local structure of the glasses changes with increasing TiO2 content. As TiO2 is incorporated into the glass, the phosphate connectivity increases as Q1 units transform to Q2, confirming that an increase in the nominal TiO2 content correlates unequivocally with an increase in glass stability. As reported for titania–silica gels, Ti4+ is clearly adopting a network former role in these phosphate-based glasses. 23Na MAS-NMR results corroborate this phenomenon with a marked upfield trend of the 23Na isotropic chemical shift suggesting that the local Na–O bond distances are decreasing within a more condensed glass network upon increased incorporation of TiO2.",
keywords = "Glasses, Nuclear magnetic resonance (NMR) , Biomaterials , Differential thermal analysis (DTA)",
author = "Azadeh Kiani and Cahill, {Lindsay S.} and Neel, {Ensanya Ali Abou} and Hanna, {John V.} and Smith, {Mark E.} and Knowles, {Jonathan C.}",
year = "2010",
month = mar,
day = "15",
doi = "10.1016/j.matchemphys.2009.10.023",
language = "English",
volume = "120",
pages = "68--74",
journal = "Materials Chemistry and Physics",
issn = "0254-0584",
publisher = "Elsevier BV",
number = "1",

}

RIS

TY - JOUR

T1 - Physical properties and MAS-NMR studies of titanium phosphate-based glasses

AU - Kiani, Azadeh

AU - Cahill, Lindsay S.

AU - Neel, Ensanya Ali Abou

AU - Hanna, John V.

AU - Smith, Mark E.

AU - Knowles, Jonathan C.

PY - 2010/3/15

Y1 - 2010/3/15

N2 - In this study, for a series phosphate-based glasses ((P2O5)0.45(CaO)0.3(Na2O)0.25−x(TiO2)x, 0 ≤ x ≤ 0.15), their degradation, ion release, surface and thermal properties have been determined. The results show that adding TiO2 was associated with a significant increase in density and glass transition temperature, but a decrease in degradation rate and ion release. 31P solid-state magic-angle-spinning nuclear magnetic resonance (MAS-NMR) showed that the local structure of the glasses changes with increasing TiO2 content. As TiO2 is incorporated into the glass, the phosphate connectivity increases as Q1 units transform to Q2, confirming that an increase in the nominal TiO2 content correlates unequivocally with an increase in glass stability. As reported for titania–silica gels, Ti4+ is clearly adopting a network former role in these phosphate-based glasses. 23Na MAS-NMR results corroborate this phenomenon with a marked upfield trend of the 23Na isotropic chemical shift suggesting that the local Na–O bond distances are decreasing within a more condensed glass network upon increased incorporation of TiO2.

AB - In this study, for a series phosphate-based glasses ((P2O5)0.45(CaO)0.3(Na2O)0.25−x(TiO2)x, 0 ≤ x ≤ 0.15), their degradation, ion release, surface and thermal properties have been determined. The results show that adding TiO2 was associated with a significant increase in density and glass transition temperature, but a decrease in degradation rate and ion release. 31P solid-state magic-angle-spinning nuclear magnetic resonance (MAS-NMR) showed that the local structure of the glasses changes with increasing TiO2 content. As TiO2 is incorporated into the glass, the phosphate connectivity increases as Q1 units transform to Q2, confirming that an increase in the nominal TiO2 content correlates unequivocally with an increase in glass stability. As reported for titania–silica gels, Ti4+ is clearly adopting a network former role in these phosphate-based glasses. 23Na MAS-NMR results corroborate this phenomenon with a marked upfield trend of the 23Na isotropic chemical shift suggesting that the local Na–O bond distances are decreasing within a more condensed glass network upon increased incorporation of TiO2.

KW - Glasses

KW - Nuclear magnetic resonance (NMR)

KW - Biomaterials

KW - Differential thermal analysis (DTA)

U2 - 10.1016/j.matchemphys.2009.10.023

DO - 10.1016/j.matchemphys.2009.10.023

M3 - Journal article

VL - 120

SP - 68

EP - 74

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

SN - 0254-0584

IS - 1

ER -