POSITIVE-CHARACTERISTIC THERMISTOR ELEMENT

文件类型：PDF文档
文件大小：1081K
Provided is a positive-characteristic thermistor element having excellent voltage resistance and no environmentally hazardous substances included in the principal components of a semiconductor ceramic. This positive-characteristic thermistor element (1) is provided with a semiconductor ceramic (11) containing BaTiO3 (where Ba may be partially substituted with at least one element selected from among Ca, Sr, and rare earth elements) as a principal component, and a pair of electrodes (12, 13) formed on both principal surfaces of the semiconductor ceramic (11). The positive-characteristic thermistor element (1) is characterized in that the semiconductor ceramic (11) includes a pair of outside regions (15, 16) adjacent to the pair of electrodes (12, 13), respectively; and an inside region (14) sandwiched between the pair of outside regions (15, 16), wherein the porosity of the outside regions (15, 16) is greater than the porosity of the inside region (14).