Li-rich/Li-poor vapor transport equilibration time dependence of surface composition of congruent LiNbO 3 crystal
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Original language | English |
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Pages (from-to) | 1661-1664 |
Journal / Publication | Journal of the American Ceramic Society |
Volume | 95 |
Issue number | 5 |
Publication status | Published - May 2012 |
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Abstract
The influence of Li-rich/Li-poor vapor transport equilibration (VTE) at 1100°C on surface Li 2O-content of 1 mm thick, congruent X- and Z-cut LiNbO 3 crystal plates was studied against VTE duration. The VTE-induced surface Li 2O-content alteration was determined from measured birefringence. The results show that the induced surface Li 2O-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 Li 2O- 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. © 2012 The American Ceramic Society.
Citation Format(s)
Li-rich/Li-poor vapor transport equilibration time dependence of surface composition of congruent LiNbO 3 crystal. / Wang, Zhen; Hua, Ping-Rang; Chen, Bei et al.
In: Journal of the American Ceramic Society, Vol. 95, No. 5, 05.2012, p. 1661-1664.
In: Journal of the American Ceramic Society, Vol. 95, No. 5, 05.2012, p. 1661-1664.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review