红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2014年
6期
1740-1744
,共5页
李想%吴钢%周刚%毕柯%汤智胤%张青枝%马计
李想%吳鋼%週剛%畢柯%湯智胤%張青枝%馬計
리상%오강%주강%필가%탕지윤%장청지%마계
激光光热法%高温超导%低温%热扩散率
激光光熱法%高溫超導%低溫%熱擴散率
격광광열법%고온초도%저온%열확산솔
laser photo- thermal method%HTS%low temperature%thermal diffusivity
根据激光光热法原理建立了高温超导带材低温真空环境下热扩散率测试系统。通过研究热扩散率与加热激光调制频率及热波通过样品时产生的相位差之间的关系,提出了激光光热法测试热扩散率实验数据处理新思路,消除了系统误差的影响。为了探讨测试方法的可靠性,以热扩散率已知的紫铜为标准样品进行了测试。在此基础上,对YBCO高温超导带材进行了测试,获得了其在40~120 K温区的热扩散率数据。YBCO高温超导带材热扩散率随温度升高而降低,尤其在40~60 K温区下降较快。
根據激光光熱法原理建立瞭高溫超導帶材低溫真空環境下熱擴散率測試繫統。通過研究熱擴散率與加熱激光調製頻率及熱波通過樣品時產生的相位差之間的關繫,提齣瞭激光光熱法測試熱擴散率實驗數據處理新思路,消除瞭繫統誤差的影響。為瞭探討測試方法的可靠性,以熱擴散率已知的紫銅為標準樣品進行瞭測試。在此基礎上,對YBCO高溫超導帶材進行瞭測試,穫得瞭其在40~120 K溫區的熱擴散率數據。YBCO高溫超導帶材熱擴散率隨溫度升高而降低,尤其在40~60 K溫區下降較快。
근거격광광열법원리건립료고온초도대재저온진공배경하열확산솔측시계통。통과연구열확산솔여가열격광조제빈솔급열파통과양품시산생적상위차지간적관계,제출료격광광열법측시열확산솔실험수거처리신사로,소제료계통오차적영향。위료탐토측시방법적가고성,이열확산솔이지적자동위표준양품진행료측시。재차기출상,대YBCO고온초도대재진행료측시,획득료기재40~120 K온구적열확산솔수거。YBCO고온초도대재열확산솔수온도승고이강저,우기재40~60 K온구하강교쾌。
According to laser photo- thermal method, the measurement system of high temperature superconducting (HTS) tapes thermal diffusivity was built in low temperature and vacuum condition. Through the research on the relationship among thermal diffusivity, modulation frequency of heating laser and phase difference of heat wave when passing through specimen, novel idea to deal with experimental data from the thermal diffusivity testing by using laser photo- thermal method was put forward, and the systematic error influence was eliminated. To verify the reliability of the measurement system, the copper was used as reference material and the thermal diffusivity of copper was measured. On that basis, the thermal diffusivity of YBCO HTS tape was measured by using laser photo- thermal method, and the thermal diffusivity of YBCO HTS tape has been got when the temperature scope was from 40 K to 120 K. The thermal diffusivity decreases with the temperature increasing. Especially, decreasing sharply in the temperature range of 40- 60 K.