| 摘要 |
The invention concerns a ceramic, a method for preparing same, and a pH measuring 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 oxidation level, is a vacancy and 0.06</=x</=0.16; it consists mainly of regular interstice-free octahedral grains having a dimension of the order of 1 to 3 mu m; it has a specific surface area ranging between 20000 cm<2>/g and 30000 cm<2>/g. |
