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《Materials Science and Technology》 2016-05
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Study on the temperature sensitive material and structure of a new ultrahigh temperature optical fiber temperature sensor

WANG Chaojie;WANG Mengnan;YAN Tao;YUAN Guangmin;College of Aerospace Science And Engineering,National University of Defense Technology;National Key Laboratory of Science and Technology on Nearspace Vehicle Technology;R&D Center,The 44th Institute of CASC;Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace( Northwestern Polytechnical University);  
In order to overcome the measurable temperature limitation,about 1 700 ℃,of existing sapphire fiber temperature sensors,the improvements in the temperature-sensitive material and structure for the sensors are presented to obtain the measurement of ultrahigh temperature range of 2 000 ~ 2 500 ℃. On one hand,a new sensor design with a contact-noncontact structure is proposed. According to the blackbody radiation based temperature measuring theory,an error compensation for Plank formula is established to accurately measure the temperature of the noncontact structure. On the other hand,material properties including strength,density,oxidation resistance,plasticity,melting point,etc and ultrahigh temperature heat responses of the refractory metal are analyzed. The thermal shock resistance test and oxidation resistance test results demonstrate that Hf B2-Si C can fully meet the requirement of ultrahigh temperature measurement. Finally,the new sensor can perform longtime steady measurement at the temperature of 2 500 ℃ with the precision of ±1%.
【Fund】: 中央高校基本科研业务费资助项目(3102015ZY08;3102015CS05006);; 111引智基地项目(B13044)
【CateGory Index】: TP212;TB33
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