Title

Dependence Of The Critical Cooling Rate For Lithium-Silicate Glass On Nucleating Agents

Abstract

The critical cooling rate, Rc, for glass formation of a 40 Li2O60 SiO2 glass, mol%, doped with small amounts of Pt, Au, P2O5, and TiO2 nucleating agents has been measured. Rc increases with increasing Pt and Au additions, but Pt has a larger effect than Au. Additions of P2O5 tend to decrease Rc, whereas TiO2 has practically no effect on Rc. The devitrified glasses, including the undoped contains only crystalline Li2O·SiO2, but all the other devitrified glasses, including the undoped glass, contain both Li2O·SiO2 and Li2O·2SiO2. Analysis shows that Rc increases as the concentration of the Li2O·SiO2 phase in the devitrified glass increases.

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

0022-3093; 1873-4812

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1986 Elsevier, All rights reserved.

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