| 摘要 |
A sintered electroconductive oxide (1) forming a thermistor element (2) has a first crystal phase having a composition represented by RE14Al2O9 and a second crystal phase having a perovskite structure represented by (RE21-aSLa)MO3, and that the factor a of the second crystal phase satisfies the following condition: 0.18<a<0.50, wherein RE1 represents a first element group consisting of at least one of Yb and Lu and at least one species selected from among group 3A elements excluding Yb, Lu, and La; RE2 represents a second element group which contains at least one species selected from among group 3A elements excluding La and which contains at least one species selected from the first element group RE1; M represents an element group consisting of Al and at least one species selected from group 4A to 7A, and 8 elements; and SL represents an element group consisting of Sr, Ca, and Mg, with at least Sr being included at a predominant proportion by mole.
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