Abstract
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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
