A zirconia single-crystal fibre-optic sensor for contact measurement of temperatures above 2000℃

摘要

Conventional sapphire fibre-optic sensors show excellent performance in high-temperature applications, but they cannot be used for contact measurement of temperatures above 1900℃. In order to extend the operating temperature of fibre-opticsensors, a radiation-based zirconia single-crystal fibre-optic sensor has been developed. This novel sensor can be operated up to 2300℃. A 60 mm long and 0.45 mm thick yttria-stabilized zirconia single-crystal fibre with one end coated with a layer ofBeO ceramic is used to generate and transmit radiation signals at high temperature. Another 520 mm long and 0.80 mm thick sapphire fibre is used as a sub-high-temperature waveguide. Experimental results from 1200℃ to 2300℃ demonstrate that the developed sensor is very promising for applications beyond 2000℃.