Presentation Information
[9p-N107-12]Control of optical, electrical and thermal properties of the thin films by metal-semiconductorphase-change caused by hydro-/dehydrogenation reactions (7): Thermal conductivity of Pd-catalyzed Ti-Mg alloy films controlled by gasochromic methods.
〇(M1)Miyu Aoyama1, Yuichiro Yamashita1,2, Takashi Yagi1,2, Minseok Kim1, Yuki Oguchi1, Naoyuki Taketoshi1,2, Yuzo Shigesato1 (1.Aoyama Gakuin Univ., 2.AIST)
Keywords:
Ti-Mg,switchable mirror material,thermal conductivity switching
Thermal switching devices that can switch between low and high thermal conductivity have attracted attention for various energy conversion systems. In this work, we focused on Ti-Mg alloy as the thermal conductivity switching materials based on the switchable mirror materials. The Ti-Mg films are known to show the reversible changes between metal and semiconductor phases by hydro-/dehydrogenation reactions. The purpose of this study is to clarify the electrical, optical and thermophysical properties changes in the Tix-Mg1-x alloy films caused by the gasochromic hydro-/dehydrogenation. In-situ thermoreflectance measurements showed that the thermal conductivity changed by a factor of 6 from hydrogenation to dehydrogenation, indicating that the Ti-Mg -Mg alloys are promising as practical thermal conductivity switch materials.