Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
72 (1992), S. 3468-3473
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
An investigation was performed on the diffusivity of lithium in lithium niobate at 1100 °C in the crystallographic z direction over the composition range from 48.38 to 49.85 mol % Li2O. A vapor transport technique was applied to produce a lithium niobate crystal with a widely varying diffusion-limited lithium concentration profile. The profile was measured through spatially resolved measurement of the phase-match temperature for frequency doubling of a Nd:YAG laser. A Boltzmann–Matano analysis was applied to the profile to estimate diffusivity as a function of composition. The validity of the Boltzmann–Matano results was examined through numerical simulation, taking into account finite interfacial mass transport. A dramatic increase of lithium diffusivity with Li/Nb ratio was observed, ranging from roughly 3×10−9 cm2/s at the 48.38 mol % Li2O congruent composition to roughly 50×10−9 cm2/s at 49.85 mol % Li2O.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.351422
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