论文标题
高性能热导体具有小弹簧常数用于低温应用
High Performance Heat Conductor with Small Spring Constant for Cryogenic Applications
论文作者
论文摘要
我们为低温应用开发了一个柔软的热导热热链路。测得的最大导热率在10 K时约为18500 W/m/k。这个弹簧常数为在室温下具有相同横截面区域的单个厚线的1/43。我们通过利用高纯度铝（99.9999％，6N）并缠绕许多直径为0.15 mm的细线来意识到这些性能。还测量了剩余电阻率（RRR），并用于估计Wiedemann-Franz定律的导热率。我们观察到尺寸对电导率的影响，并评估了机械变形对RRR的影响。这些评估使我们能够为低温应用设计务实的热链接。
We developed a soft and high thermal conductive heat link for cryogenic applications. The measured maximum thermal conductivity was approximately 18500 W/m/K at 10 K. This spring constant was 1/43 of that of a single thick wire with the same cross-sectional area at room temperature. We realized these performances by utilizing high purity aluminum (99.9999 %, 6N) and by stranding many thin wires that are 0.15 mm in diameter. The electrical Residual Resistivity Ratio (RRR) was also measured and used to estimate the thermal conductivity by Wiedemann-Franz law. We observed the size effect on the electrical conductivity, and evaluated the effect of mechanical deformation to the RRR. These evaluations allow us to design a pragmatic heat link for cryogenic application.
