A method of producing a metal oxide thin film using a sol, metal oxide thin film structure and solid oxide fuel cell comprising said thin film

摘要

A method of producing a metal oxide thin film structure comprising the steps of: (1) preparing a metal oxide salt solution containing a first metal oxide selected from the group consisting of zirconium oxide, cerium oxide, lanthanum gallate, barium cerate, barium zirconate, bismuth oxide and doped forms thereof; and (2) dispersing a nanopowder of a second metal oxide selected from the group consisting of zirconia, ceria, lanthanum gallate, barium cerium, barium zirconate, bismuth oxide and doped forms thereof in the metal oxide salt solution to produce a metal oxide powder dispersed sol; (3) coating a porous substrate with the metal oxide powder dispersed sol; (4) coating the resulting substrate with the metal oxide salt solution prepared in step (1); and (5) sintering the resulting substrate to prepare a metal oxide thin film structure, wherein two or more sols having dispersed metal oxide powder having different contents are prepared in step (2); and the porous substrate used in step (3) is coated therewith to different extents, and wherein the second metal oxide nanopowder is dispersed in the metal oxide salt solution in an amount of 1 to 50% by weight based on the total weight of the metal oxide powder dispersed sol.