High temperature and abrasion resistant temperature measuring de

Details High temperature and abrasion resistant temperature measuring de High temperature and abrasion resistant temperature measuring de

1993-07-15

1995-10-10

Walsh, Donald P.

Batteries: thermoelectric and photoelectric

Thermoelectric

Having housing, mounting or support

136233, 136234, 374139, 374179, 374208, H01L 3502

Patent

active

054567610

ABSTRACT:
A temperature measuring device for measuring the temperature of an abrasive particulate material of the type found, for example, in rotary calcining kilns and the like. The device comprises a temperature sensor producing an indication of a temperature to which the sensor is exposed, circuitry or the like for connecting the temperature sensor to remote equipment for converting the indication to a recognisable form and a protective element shielding the temperature sensor from damage by the abrasive particulate material. The protective element comprises a layer of ceramic material having a matrix of alumina reinforced with 5 to 50% by volume (based on the total volume of the ceramic material) of particles of silicon carbide having an average size, at least in two dimensions, within the range of about 5 to 60 microns. The protective element provides good abrasion, heat-shock and mechanical resistance while exhibiting sufficient thermal conductivity to avoid undue inaccuracies in the temperature measurements.

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Semkina et al--"A Refractory Protective Tube For Thermocouples In Copper Smelting"--Tsvetnye Metally, 1981, 4, 88-89.

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