Pulse thermometers based on synthetic single crystal boron-doped diamonds

A time delay of electrical resistance of boron-doped semiconductor diamond sensor at heating pulses was investigated. We used a symmetric scheme with 2 equivalent 2 × 2 × 1.5 mm3 single crystal elements connected via thermal conductive electrical insulating glue. One of elements served as pulse heater and the other one as a sensor. About 40 ms characteristic time delay of diamond sensor was achieved. It is supposed, that using smaller crystals for sensors and by optimization of their electrical and heat conductivity properties, a regular value of time delay less than 1 ms will be attained. The potential application of diamond thermometers for temperature control in combustion engines is shown.