Japan Geoscience Union Meeting 2019

Presentation information

[J] Oral

S (Solid Earth Sciences ) » S-MP Mineralogy & Petrology

[S-MP33] Physics and Chemistry of Minerals

Wed. May 29, 2019 1:45 PM - 3:15 PM A07 (TOKYO BAY MAKUHARI HALL)

convener:Seiji Kamada(Frontier Research Institute for Interdisciplinary Sciences, Tohoku University), Masahiro KAYAMA(Department of Earth and Planetary Material Sciences, Faculty of Science, Tohoku University), Chairperson:Fumiya Noritake(Materials Science, Faculty of Engineering, Graduate Faculty of Interdisciplinary Research, UNIVERSITY OF YAMANASHI), Seiji Kamada(FRIS, Tohoku Univ.)

3:00 PM - 3:15 PM

[SMP33-16] DAC-GHz ultrasonic P wave velocity measurement on KCl and natural olivine

*Akira Yoneda1, Shinichiro Kobayashi2, Seiji Kamada3 (1.Institute for planetary materials, Okayama University, 2.Department of Earth Science, Graduate school of Science, Tohoku Univ., 3.Frontier Research Institute for Interdisciplinary Sciences, Tohoku Univ.)

Keywords:elasticity, DAC, GHz ultrasonics

GHz ultrasonic velocity measurements has been developed up to 14 GPa in diamond anvil cell (DAC). In order for GHz ultrasonic measurement, both P and S wave buffer rods were manufactured through sputtering ZnO piezoelectric film on single crystal rods, such as sapphire, rutile, and YAG. Several technical breakthroughs were achieved before observing stable signals from the specimen squeezed in DAC: (1) Wiping by aqueous ammonia on the contact surfaces enhances transmissibility of GHz wave from buffer rod to diamond. (2) Cleaning by lathery detergent and water jet is effective to remove sticky staff on rear surface of diamond. (3) Steel ball supporter provides easier adjustment of contact between buffer rod and diamond. Consequently, we succeeded to demonstrate performance of DAC-GHz system through KCl and natural olivine samples.