CERAMICS HAS STRUCTURE PEROVSKITE, ITS USE AS ELECTRODE DEREFERENCE

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The invention concerns a ceramic, a method for preparing same, and a reference electrode containing same. The ceramic has a perovskite structure and the following properties : its composition is of formula L(2/3) -xA3x (1/3)-2xEO3, wherein L is Bi, Sb, a lanthanide or an alkaline-earth metal; A is Ag or an alkali metal; E is a transition metal oxidizable up to +5 oxidation level, alone or combined with Al or a transition metal oxidizable up to +5 or +6 level; is a vacancy and 0.03/g.