Sol-gel processing of lithium niobate thin layers for optical applications

Dennis J. Eichorst; David A. Payne

doi:10.1117/12.22582

1 November 1990 Sol-gel processing of lithium niobate thin layers for optical applications

Dennis J. Eichorst, David A. Payne

Proceedings Volume 1328, Sol-Gel Optics; (1990) https://doi.org/10.1117/12.22582
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

The sol-gel processing of lithium niobate thin-layers on silicon from heterometallic alkoxide solutions is described. Advantages of sol-gel processing for low-temperature formation of stoichiometric lithium niobate are discussed. A recyrstallization procedure, involving a bimetallic alkoxide, was developed for the purification of alkoxide solutions. The alkoxide complex contained the appropriate cation ratio for the preparation of stoichiometric lithium niobate. Solvent selection, addition of nitric acid or ammonium hydroxide, and thermal processing conditions were shown to affect the ceramic microstructures. In particular, the solvent system and additives influenced grain growth and porosity in the crystallized layers. Methoxyethanol-derived layers had a grain size approximately twice that observed for the ethanol system. Use of a rapid heating process produced dense layers at 650°C, whereas oxygen treatments allowed for crystallization at 400°C.

Citation Download Citation

Dennis J. Eichorst and David A. Payne "Sol-gel processing of lithium niobate thin layers for optical applications", Proc. SPIE 1328, Sol-Gel Optics, (1 November 1990); https://doi.org/10.1117/12.22582

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