| Full text | |
| Author(s): |
Fokin, Vladimir M.
[1]
;
Souza, Guilherme P.
[1]
;
Zanotto, Edgar D.
[1]
;
Lumeau, Julien
[2]
;
Glebova, Larissa
[2]
;
Glebov, Leonid B.
[2]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed Sao Carlos, Dept Mat Engn, Vitreous Mat Lab, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Cent Florida, CREOL, Coll Opt & Photon, Orlando, FL 32816 - USA
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Journal of the American Ceramic Society; v. 93, n. 3, p. 716-721, MAR 2010. |
| Web of Science Citations: | 14 |
| Abstract | |
Photo-thermo-refractive (PTR) glass undergoes a refractive index change after UV exposure followed by heat treatment for nanocrystallization of NaF, allowing phase holograms to be permanently recorded in the glass. PTR glass was invented 60 years ago, and optical elements based on PTR glass have been produced for the past decade, but its detailed crystallization mechanism is largely unknown. Since solubility and composition of the parent glass determine the supersaturation and hence the thermodynamic driving force for crystallization, the present paper was aimed at measuring the solubility of NaF in PTR glass via estimating the equilibrium volume fraction of crystallized NaF as a function of temperature. The temperature above which all NaF originally contained in the parent glass remains dissolved in the melt, and that below which all NaF could crystallize, were also estimated. Redesigning of thermal processing parameters and composition of PTR glass, aiming at the improvement of optical elements based on this glass, can be performed in light of the results achieved. (AU) | |
| FAPESP's process: | 08/02645-0 - Thermal Behaviour and Microstructural Evolution in Photo-Thermo-Refractive Glass During Crystallization |
| Grantee: | Guilherme Parente Souza |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 07/08179-9 - Kinetic processes in glasses and glass ceramics |
| Grantee: | Edgar Dutra Zanotto |
| Support Opportunities: | Research Projects - Thematic Grants |