Patent ID: 8313235

Claim:
A method for manufacturing a contact temperature sensor to be used at a temperature of use T U , the sensor to withstand a temperature higher than 800° C., the method comprising: supply of a carbon fiber of length L and of micrometric diameter; heat treatment of the fiber at a temperature T 1 higher than 800° C. and higher than the temperature T U of use of the sensor; full layer deposition on the fiber, at a deposition temperature T D , of a coating layer of electrically insulating ceramic material and stable at the temperature of use T U of the sensor, the ceramic material being chosen among silica (SiO 2 ), zirconia (ZrO 2 ), or alumina (Al 2 O 3 ); and heat treatment of the fiber, coated with the coating layer, at a temperature T 2 higher than the deposition temperature T D of the coating layer and higher than the temperature of use T U of the sensor.