Epitaxial growth of KNbO3 and Fe-doped KNbO3 films via sol-gel processing

Chih-Hsing Cheng; Yuhuan Xu; John D. Mackenzie

doi:10.1117/12.188978

13 October 1994 Epitaxial growth of KNbO₃ and Fe-doped KNbO₃ films via sol-gel processing

Chih-Hsing Cheng, Yuhuan Xu, John D. Mackenzie

Proceedings Volume 2288, Sol-Gel Optics III; (1994) https://doi.org/10.1117/12.188978
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

Transparent and uniform thin films of crystalline KNbO₃ were synthesized on different substrates such as SrTiO₃, ZrO₂, MgO and Pt by the dip-coating method using a double alkoxides solution. Both KNbO₃ and Fe-doped KNbO₃ films were epitaxially crystallized at 750 degree(s)C for 3 hours in air on SrTiO₃ single crystal substrates. Excess potassium in the sol-gel solution (K/Nb equals 1.1) was important to obtain single phase films. The structure of the films has been studied with x-ray and electron diffraction, and transmission electron microscopy. Different molar ratios of 2-ethylhexanoic acid (2-EHA) to alkoxides were applied to control the hydrolysis rate of the sol-gel solution. Dense films were produced after using the modified alkoxides solution as stock solution.

Citation Download Citation

Chih-Hsing Cheng, Yuhuan Xu, and John D. Mackenzie "Epitaxial growth of KNbO₃ and Fe-doped KNbO₃ films via sol-gel processing", Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); https://doi.org/10.1117/12.188978

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