The Properties And Structure Of Zinc Magnesium Phosphate Glasses

Author

Charmayne E. Smith (Lonergan), Missouri University of Science and TechnologyFollow
Richard K. Brow, Missouri University of Science and TechnologyFollow

Abstract

Zn-Mg-phosphate (ZMP) glasses, including those with the nominal molar compositions (50 - x)ZnO xMgO 50P₂O₅ (0 ≥ x ≥ 50) and (60 - y)ZnO yMgO 40P₂O₅(0 ≥ y ≥ 60), were prepared and properties such as density, refractive index, coefficient of thermal expansion and glass transition temperature (Tg), were measured. The glass transition temperature increases by 100-150 C and the room temperature dissolution rates in water decrease by 1-2 orders of magnitude when MgO replaces ZnO while maintaining a constant P₂O₅ content. Glass structures were characterized by Raman spectroscopy and there were no significant changes in the phosphate anion distributions when MgO replaces ZnO. The significant changes in properties cannot be explained by a simple cation field strength argument since Mg^{2 +} and Zn ^{2 +} have similar sizes; instead, the effect of 3d electrons on the nature of the bonds between Zn^{2 +} ions and non-bridging oxygens on the phosphate tetrahedra must be considered. © 2014 Elsevier B.V.

Recommended Citation

C. E. Smith (Lonergan) and R. K. Brow, "The Properties And Structure Of Zinc Magnesium Phosphate Glasses," Journal of Non-Crystalline Solids, vol. 390, pp. 51 - 58, Elsevier, Apr 2014.

The definitive version is available at https://doi.org/10.1016/j.jnoncrysol.2014.02.010

Department(s)

Materials Science and Engineering

Comments

National Science Foundation, Grant DMR 1207520

Keywords and Phrases

Divalent cations; Electron configurations; Thermal properties; Zinc magnesium phosphates; Zinc phosphate glasses

International Standard Serial Number (ISSN)

0022-3093

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 Elsevier, All rights reserved.

Publication Date

15 Apr 2014