| 摘要 |
<p>An object of the present invention is to provide a semiconductor ceramic which is excellent in voltage resistance, and a positive temperature coefficient thermistor element using the semiconductor ceramic. The semiconductor ceramic constituting a component body 11 of a positive temperature coefficient thermistor element 1 contains, as its main constituent, a compound represented by the general formula (Ba 1-(x+y+z)/100 Ca x/100 Sr y/100 Smc z/100 )TiO 3 (where Smc represents a semiconductivity-imparting agent), and contains Mn in a proportion of t parts by mol with respect to 100 parts by mol of the main constituent, characteristically, x, y, and t satisfy relationships of: 2.500 ‰¤ x ‰¤ 20.000; 0.000 ‰¤ y ‰¤ 5.000; 2.500 ‰¤ x + y ‰¤ 20.000; and 0.030 ‰¤ t ‰¤ 0.150, and z is equal to or more than the amount of semiconductivity-imparting agent Smc at which resistivity is minimum on a curve showing a relationship between the amount of semiconductivity-imparting agent Smc and the resistivity, which is defined by x, y, and t.</p> |
