High Elastic Moduli of a 54Al2O3-46Ta2O5 Glass Fabricated via Containerless Processing

Glasses with high elastic moduli have been in demand for many years because the thickness of such glasses can be reduced while maintaining its strength. Moreover, thinner and lighter glasses are desired for the fabrication of windows in buildings and cars, cover glasses for smart-phones and substrat...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2015-10, Vol.5 (1), p.15233-15233, Article 15233
Main Authors: Rosales-Sosa, Gustavo A, Masuno, Atsunobu, Higo, Yuji, Inoue, Hiroyuki, Yanaba, Yutaka, Mizoguchi, Teruyasu, Umada, Takumi, Okamura, Kohei, Kato, Katsuyoshi, Watanabe, Yasuhiro
Format: Article
Language:English
Subjects:
Materials elasticity
Mechanical properties
NMR
Nuclear magnetic resonance
Optical properties
Spectroscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Glasses with high elastic moduli have been in demand for many years because the thickness of such glasses can be reduced while maintaining its strength. Moreover, thinner and lighter glasses are desired for the fabrication of windows in buildings and cars, cover glasses for smart-phones and substrates in Thin-Film Transistor (TFT) displays. In this work, we report a 54Al2O3-46Ta2O5 glass fabricated by aerodynamic levitation which possesses one of the highest elastic moduli and hardness for oxide glasses also displaying excellent optical properties. The glass was colorless and transparent in the visible region, and its refractive index nd was as high as 1.94. The measured Young's modulus and Vickers hardness were 158.3 GPa and 9.1 GPa, respectively, which are comparable to the previously reported highest values for oxide glasses. Analysis made using (27)Al Magic Angle Spinning Nuclear Magnetic Resonance (MAS NMR) spectroscopy revealed the presence of a significantly large fraction of high-coordinated Al in addition to four-coordinated Al in the glass. The high elastic modulus and hardness are attributed to both the large cationic field strength of Ta(5+) ions and the large dissociation energies per unit volume of Al2O3 and Ta2O5.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep15233