Presentation Information
[23a-A304-7]Evaluation of thermal transport properties of boric acid single crystals with a strong hydrogen bonding network
〇Kubo Natsuki1, Takehara Ryosuke1, Ryu Meguya2, Morikawa Junko1, Akutagawa Tomoyuki3, Fukushima Takanori1 (1.Tokyo Tech, 2.AIST, 3.Tohoku Univ.)
Keywords:
thermal diffusivity,hydrogen bond,boric acid
Crystalline boric acid features a structure in which 2D sheets with hydrogen-bonding networks, which are stacked on top of each other to form a layered structure. With an expectation that high thermal conduction would occur through the extensive hydrogen bonding network, we evaluated the thermal transport properties of single crystals of boric acid for the in-plane and stacked directions of the 2D sheet. We found that the thermal diffusivity in the in-plane direction is approximately seven times higher than in the stacked direction, indicating that the hydrogen bonding network provides an efficient pathway for thermal transport. We also revealed that the effect of deuterium substitution on thermal diffusivity is very small.