[21p-A311-1~15] 9.5 New functional materials and new phenomena

3:45 PM - 4:00 PM JST(6:45 AM - 7:00 AM UTC)

[21p-A311-11] The Evaluation of the Electrical Resistivity in Smart Radiation Device with Controlled Chemical Composition

〇Kyosuke Sato¹, Sumitaka Tachikawa², Tomohiko Saitoh³, Ryo Hoshino³, Hayate Endo¹, Hideki Kuwahara¹ (1.Sophia Univ., 2.ISAS/JAXA, 3.TUS)

Keywords:

Metal-Insulator phase transition,Mn oxide,Emittance

Spacecrafts have radiators on their surface 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 the base material, Perovskite-type Mn oxide, to change the emittance autonomously. In this study , we report on the evaluation results of the SRD characteristics by measuring the temperature dependence of electrical resistivity, which generally correlates positively with emittance, and by fabricating crystalline samples with controlled chemical composition in order to improve the emittance of SRD.