Process for producing a solid electrolyte layer on a substrate, in a fuel cell, and in a sensor

US7087336B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Robert Fleck · Wiesendorf, DE
• Michael Kuznecov · Dresden, DE
• Peter Otschik · Rabenau, DE
• Winfried Schaffrath · Dresden, DE
• Nikolai Trofimenko · Dresden, DE

Key dates

• Filing date: Feb 24, 2003
• Grant date: Aug 8, 2006
• Expiry date: Aug 3, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for producing a solid electrolyte layer, of a fully stabilized zirconium oxide layer on a substrate includes adding a sintering additive to a ZrO2-starting material, a liquid phase is formed during a sintering process and liquid phase sintering is possible at a reduced temperature in comparison with the required sintering temperature without the sintering additive. The reduced sintering temperature substantially prevents the formation of a foreign phase layer between the substrate and the gas-tight layer applied thereon, being of fully stabilized ZrO2. The method is particularly suitable for producing a solid electrolyte layer on a cathode of a high temperature fuel cell and in a sensor.