10—290 K环境下海藻纤维导热性能的研究  

Study on thermal conductivity of seaweed fiber in 10 to 290 K temperature environment

作　　者：张满 林欢[1] 朱珊珊 董华[1] Zhang Man;Lin Huan;Zhu Shanshan;Dong Hua(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266033,China)

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266033

出　　处：《低温与超导》2022年第4期39-43,共5页Cryogenics and Superconductivity

基　　金：国家重点研发计划项目基金(2019YFE0119900);山东省自然科学基金(ZR2020ME183)。

摘　　要：为研究海藻纤维变温环境下的热性能,利用瞬态电热技术(TET)在环境温度10 K—290 K的区间内对材料导热、体积比热等参数受温度影响的情况进行测试分析。结果表明:海藻纤维导热系数和比热均随温度降低而减小,热扩散系数随温度的降低而增大,内部结构较为稳定。海藻纤维的德拜温度分别是202.99 K、192.31 K,低温极限下的残余阻温系数分别为3.46×10^(5)s·m^(-2)、2.15×10^(5)s·m^(-2)。In order to investigate the thermal performance of seaweed fibres in a variable temperature environments, the material’s thermal conductivity, bulk specific heat and other parameters were tested and analysed in the temperature range of 10 to 290 K using the transient electrical heating technique(TET). The test results show that the thermal conductivity and specific heat of seaweed fibers decrease with decreasing temperature, the thermal diffusion coefficient increases with temperature, and the internal structure is more stable. The Debye temperatures of seaweed fibers are: 202.99 K, 192.31 K, and the residual temperature resistance coefficients at the low temperature limit are 3.46×10^(5)s·m^(-2),2.15×10^(5)s·m^(-2) respectively.

关 键 词：变温环境 导热系数 德拜温度 

分 类 号：TB332[一般工业技术—材料科学与工程]