| 摘要 |
PROBLEM TO BE SOLVED: To make uniform the particle diameter of a sintered body and to improve a breakdown voltage by heating from 1,100 deg.C to a retention temperature with a temperature increase speed of 600 deg.C/hr or higher in a method for manufacturing a positive temperature coefficient thermistor. SOLUTION: The temperature of a positive temperature coefficient thermistor of a composition (Ba0.782 Pb0.218 )TiO2 +0.0007Nb2 O5 +0.001Al2 O3 +0.02SiO2 +0.0003 Mn(NO3 )2 is increased from 1,100 deg.C to a retention temperature of 1,300 deg.C at a temperature increase speed of 600-900 deg.C/hr and a sintered body particle diameter is aligned to 5-18μm, thus improving a breakdown voltage. |
