METHOD FOR MANUFACTURING NEGATIVE TEMPERATURE COEFFICIENT THERMISTOR AND NEGATIVE TEMPERATURE COEFFICIENT THERMISTOR

摘要

A method for manufacturing a negative temperature coefficient thermistor, which uses a semiconductor ceramic made of a spinel composite oxide that essentially comprises Mn and contains Al. An Al2O3 powder having an average primary particle diameter of 0.05 to 0.3 μm and a specific surface area of 10 to 80 m2/g are used as a starting material. The negative temperature coefficient thermistor is able to be sintered at a low temperature, is small in variation of the initial properties, and hardly deteriorates in characteristics with time.