[19p-C301-1~14] 9.5 New functional materials and new phenomena

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)

[19p-C301-10] Evaluation of Electrical Resistivity in Smart Radiation Device with Controlled Chemical Composition in Low Doping Range

〇Kyosuke Sato¹, Sumitaka Tachikawa², Tomohiko Saitoh³, Hideki Kuwahara¹ (1.Sophia Univ., 2.ISAS/JAXA, 3.TUS)

Keywords:

metal-insulator transition,Mn oxside,emissivity

Spacecrafts are equipped with radiators on their surfaces to control the temperature of onboard equipment by thermal radiation. Smart Radiation Device (SRD) is a thermal control device that uses the metal-insulator phase transition of Mn oxide to change the emissivity with temperature. In this study, we aimed to improve the radiation characteristics of the SRD, synthesized polycrystalline samples with controlled chemical composition, and reported the results of evaluating the SRD characteristics through powder X-ray structural analysis and measurements of the temperature dependence of magnetization and electrical resistivity.