| 简介 |
PROBLEM TO BE SOLVED : To provide an oxygen sensor element the humidity resistance, and the like of which are improved without impairing sensor characteristics.
SOLUTION : Provided is an oxygen sensor element, composed of a ceramic sintered compact, for detecting an oxygen concentration on the basis of a current value when a voltage is applied, the ceramic sintered compact including a composition Ln1-zCazBa2-zLazCu3O7-δ(0.25≤z≤1) derived by replacing a portion of a composition formula LnBa2Cu3O7-δ (Ln is a rare earth element, δ represents an oxygen non-stoichiometric amount) with an element selected from periodic table group 2 elements (e.g., calcium (Ca)) and an element selected from lanthanoid elements (e.g., lanthanum (La)). It also includes a composition Nd1+xBa2-xCu3O7-δ(0
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