Ledende materiale omfattende minst to faser

摘要

An electronically conducting or mixed ionic and electronically conducting non-stoich-iometric oxide, in which undesired pO2 driven volume changes of the main phase is counterbalanced by contraction/expansion of one or several secondary phase(s) or by gradual solution/dissolution of the secondary phae in/from the main phase. This principle makes it possible to achieve improved dimensional stability relatively to that of the main phase alone, whilst maintaining good transport properties or, alternatively, to improve transport properties, whilst maintaining the maximum volume change in a technological application.