The determination of ionic transport properties at high pressures in a diamond anvil cell

Qinglin Wang, Cailong Liu, Yonghao Han, Chunxiao Gao, Yanzhang Ma

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

A two-electrode configuration was adopted in an in situ impedance measurement system to determine the ionic conductivity at high pressures in a diamond anvil cell. In the experimental measurements, Mo thin-films were specifically coated on tops of the diamond anvils to serve as a pair of capacitance-like electrodes for impedance spectrum measurements. In the spectrum analysis, a Warburg impedance element was introduced into the equivalent circuit to reveal the ionic transport property among other physical properties of a material at high pressures. Using this method, we were able to determine the ionic transport character including the ionic conductivity and the diffusion coefficient of a sodium azide solid to 40 GPa.

Original languageEnglish
Article number123904
JournalReview of Scientific Instruments
Volume87
Issue number12
DOIs
StatePublished - Dec 1 2016

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