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PREPARATION AND CHARACTERIZATION OF DENSE OXIDE THIN FILMS BY POLYMERIC PRECURSORS

Detailed Technology Description

None

Supplementary Information

Patent Number: US5494700A
Application Number: US1994222860A
Inventor: Anderson, Harlan U. | Nasrallah, Magdi M. | Chen, Chieh Cheng
Priority Date: 5 Apr 1994
Priority Number: US5494700A
Application Date: 5 Apr 1994
Publication Date: 27 Feb 1996
IPC Current: B01D005322 | B01D007102 | C04B004145 | C04B004181 | H01M000812
US Class: 427115 | 427240 | 4273762 | 427384
Assignee Applicant: The Curators of the University of Missourilumbia
Title: Method of coating a substrate with a metal oxide film from an aqueous solution comprising a metal cation and a polymerizable organic solvent
Usefulness: Method of coating a substrate with a metal oxide film from an aqueous solution comprising a metal cation and a polymerizable organic solvent
Summary: USE The membrane is used to separate pure oxygen from air. The fuel cell component is an electrolyte or electrode.
Novelty: Component prepn. for solid oxide fuel cell by preparing ppte.-free starting soln., heating soln. to form polymeric precursor, depositing polymeric precursor onto substrate surface, etc.

Industry

Chemical/Material

Sub Category

Fuel Cell

Others

*Abstract

Abstract of US Patent 5,494,700 - Method of coating a substrate with a metal oxide film from an aqueous solution comprising a metal cation and a polymerizable organic solvent: A method for preparing a substrate coated with a polycrystalline, metal oxide film using polymeric precursors. The oxide films prepared by the method of the present invention are dense (i.e., substantially free of cracks and pinholes) and may be used, for example, as an electrolyte or electrode in intermediate temperature solid oxide fuel cells (SOFCs) or as gas separation membranes.Non-Confidential Abstract of Invention: A novel thin film synthesis technique, the ethylene glycol process, has been developed for the fabrication of dense oxide films (0.1-2 ?m) from precursor solutions at relatively low temperature. Dense, smooth and homogeneous oxide films, e.g. (CeO2)0.8(SmO1.5)0.2, (ZnO2)0.84, (YO1.5)0.16, La0.8Sr0.2MnO3, and La0.6Sr0.4Co0.2Fe0.8O3, were obtained on both porous and dense substrates by spin-coating the polymeric precursor and subsequent heat treatment. Crystallization of the deposited films occurred at temperatures as low as 320 degrees Celsius on Pt and LSCF substrates. These resulting oxide thin films are suitable for demanding solid oxide fuel cell components or gas separation membranes applications.

*Principal Investigator

Name: Harlan Anderson, Curator's Professor Emeritus of Ceramic Engineering

Department:

Name: CHIEH-CHENG CHEN

Department:

Name: M. NASRALLAH

Department:

Country/Region

USA