Patent ID: 6878304
Filing Date: 2005-04-12
Classification: H01C

Abstract:
1. A thermistor having durability against a reducing atmosphere comprised of a sintered body of a metal oxide obtained by shaping and firing a thermistor material, the metal oxide having a mean particle size of the thermistor material of less than 1.0 μm, and having a mean sintered particle size of the sintered body of the metal oxide of 3 μm to 20 μm, wherein the sintered body of the metal oxide is a mixed sintered body (M1 M2)O 3 .AO x of a composite oxide (M1 M2)O 3 having a provskite structure and a metal oxide AO x , wherein, in the composite oxide (M1 M2)O 3 , M1 is at least one element selected from elements of Group IIA of the Periodic Table and Group IIIA except for La and M2 is at least one element selected from elements of Group IIIB, Group IVA, Group VA, Group VIA, Group VIIA, and Group VIII of the Periodic Table, the metal oxide AO x having a melting point of at least 1400° C., and a resistance (1000° C.) of the AO x alone in the shape of the thermistor is at least 1000Ω.