| 摘要 |
PROBLEM TO BE SOLVED: To provide an extremely-low-temperature heat transfer material which can exhibit an excellent heat conductivity at an extremely-low-temperature. SOLUTION: The extremely-low-temperature heat transfer material is made of ultrahigh purity aluminum having a purity of≥99.9999 mass%, and in which the content of Fe is≤0.1 massppm. In the ultrahigh purity aluminum, preferably, the contents of the respective elements of Ti, V, Cr and Zr are≤0.1 massppm, respectively. The extremely-low-temperature heat transfer material has a heat conductivity of≥3×10<SP>4</SP>W/m/K at an absolute temperature of 4 to 12 K. COPYRIGHT: (C)2010,JPO&INPIT |
