MANUFACTURING METHOD OF VOLTAGE NON-LINEAR RESISTOR, VOLTAGE NON-LINEAR RESISTOR ELEMENT USING THIS VOLTAGE NON-LINEAR RESISTOR MANUFACTURED BY THIS METHOD, AND LIGHTNING ARRESTER USING THIS VOLTAGE NON-LINEAR RESISTOR ELEMENT

摘要

PROBLEM TO BE SOLVED: To manufacture a voltage non-linear resistor that does not require after-heat- treatment and has a leakage current reducing over aging when current carrying and is excellent in current carrying life characteristics, and provide a voltage non-linear resistor element and a lightning arrester using this voltage non-linear resistor.;SOLUTION: This is a manufacturing method of a voltage non-linear resistor which has zinc oxide (ZnO) as the main component and contains at least bismuth oxide and manganese oxide. Thermally stable tetroixide trimanganese (Mn304) is used for the manganese oxide, and by sintering at 800 to 1,150C, a bismuth oxide phase is obtained without heat treating as before. Thus, a voltage non-linear resistor is obtained with excellent current carrying life characteristics. Further, a voltage non- linear resistor which is excellent in the voltage ratio in a small current range can be obtained with excellent current carrying life characteristics by adding the tetroixide trimanganese of the amount of 0.1 to 5 against the amount 100 of the zinc oxide.;COPYRIGHT: (C)2003,JPO