| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ceramic heater, a gas sensor element and an abnormal part detection method for the ceramic heater capable of easily detecting abnormality of a lead part. <P>SOLUTION: In this ceramic heater composed by embedding a heating element and the lead part connected to the heating element for supplying a current to the heating element in a ceramic, electromagnetic waves are radiated on the surface of the ceramic to excite the ceramic, and thereafter a current is carried to the lead part to detect the presence of light emission of the ceramic. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
