Method of preparing a thin ceramic composition with two materials, the composition thus obtained and the constituent electrochemical cell and membrane

US7332108B2 · kind B2 · utility

Assignee

• L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude · FR

Inventors

• Thierry Chartier · Riom, FR
• Francois Guillotin · Marly, FR

Key dates

• Filing date: May 16, 2002
• Grant date: Feb 19, 2008
• Expiry date: Aug 29, 2023

Classification

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

Abstract

There is disclosed a method for preparing a thin ceramic and/or metallic solid-state composition consisting of three phases: a material (A), a material (B) and pores. The concentration of each phase varies continuously from one face of the article to the other in a continuous and controlled gradient. The porous matrix of material (A) has a porosity gradient of 0% to about 80%, the pores being completely or partly filled with material (B). The concentration of material (B) in the article therefore varies from 80% to 0% of small thicknesses.