| 摘要 |
PROBLEM TO BE SOLVED: To realize a resistor element having a PTC characteristic and a small hysteresis, by causing the resistor element to contain at least one element of lanthanoids as a sub-component. SOLUTION: In a PTC resistor element made of V2 O3 oxide ceramics which contains V2 O3 as a principal component and a small quantity of sub-component added thereto and exhibits a PTC characteristic, at least one element of lanthanoids is contained as the sub-component. As the lanthanoids, at least one element of dysprosium, holmium, erbium, thorium, ytterbium, and lutetium is contained at a metal atomic ratio within a range of approximately 0.01 to 30%. Thus, an element having the hysteresis decreased and having excellent mechanical strength and thermal shock resistance may be provided. |
