基于激光光热方法的超导带材热扩散率测试与分析  

Testing and analysis of thermal diffusivity of superconducting tapes based on laser photothermal method

作　　者：马计[1] 吴钢[1] 李想[1] 汤智胤[1] 张青枝[1] 雷选华[2] 

机构地区：[1]海军工程大学动力工程学院,武汉430033 [2]海军工程大学兵器工程系,武汉430033

出　　处：《海军工程大学学报》2014年第1期38-41,共4页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51076165)

摘　　要：为了研究超导带材的热物性，基于激光光热法构建了超导带材热扩散率测试系统，建立了热扩散率计算数学模型，在30～75 K温区对Bi-2223超导带材的热扩散率进行了测试，结果表明：Bi-2223超导带材热扩散率随温度升高而降低，在30～40 K温区下降较快，而在40～75 K温区则趋于平缓，得到了Bi-2223超导带材的实际应用和热设计适用温区。To study the thermal properties of superconducting tapes ,a superconducting tape thermal diffusivity test system has been established based on the laser photothermal method .And the mathe-matical model has been constructed to calculate thermal diffusivity . T hey are used to measure the thermal diffusivity of Bi-2223 suerconducting tape in the temperature scope from 30 K to 75 K .The re-sults show that as the temperature increases ,the thermal diffusivity of the high temperature super-conducting Bi-2223 tape will decrease ,and that it will decrease faster in the temperature scope from 30 K to 40 K than in that from 40 K to 75 K .As a result ,the applicable temperature scope of Bi-2223 superconducting can meet the needs of the design and actual application .

关 键 词：超导带材 BI-2223 热扩散率 

分 类 号：TB663[一般工业技术—制冷工程]