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Li-Rich/ Li-Poor Vapor Transport Equilibration Time Dependence of Surface Composition of Congruent LiNbO3 Crystal.
- Source :
-
Journal of the American Ceramic Society . May2012, Vol. 95 Issue 5, p1661-1664. 4p. - Publication Year :
- 2012
-
Abstract
- The influence of Li-rich/ Li-poor vapor transport equilibration ( VTE) at 1100°C on surface Li2 O-content of 1 mm thick, congruent X- and Z-cut LiNbO3 crystal plates was studied against VTE duration. The VTE-induced surface Li2 O-content alteration was determined from measured birefringence. The results show that the induced surface Li2 O-content alteration has a square root dependence on the VTE duration for both cases of Li-rich and Li-poor VTE. The dependence shows a slight effect of cut of plate and is stronger for the Z-cut plate. The Li-rich VTE duration required for surface composition reaching the stoichiometric boundary is similar to 20.0/15.6 h for the X-/Z-cut plate. In contrast, the Li-poor VTE is a much slower process than the Li-rich VTE. The Li-poor duration required to reach the Li-deficient boundary is 400/323 h for the X-/Z-cut plate. Based upon the known VTE duration dependence of surface Li2 O-content, a mathematical model is established and the solution to the diffusion equation, an integral of error function complement, is obtained and verified by previously reported experimental results on Li-poor VTE. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 95
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 75061954
- Full Text :
- https://doi.org/10.1111/j.1551-2916.2011.05049.x