Open AccessMetallic Contaminant Detection in Liquids using a High-Tc RF-SQUID
Author(s) -
Masaru Sagawa,
K. Hayashi,
Takeyoshi Ohtani,
Saburo Tanaka
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1975/1/012021
Subject(s) - squid , materials science , metal , contamination , volume (thermodynamics) , signal (programming language) , analytical chemistry (journal) , optoelectronics , chemistry , chromatography , metallurgy , ecology , physics , quantum mechanics , computer science , biology , programming language
We have developed a system using high-temperature radio frequency superconducting quantum interference device (RF-SQUID) for detecting metallic contaminants in the liquid component of a lithium-ion battery. Although we have executed detection experiments using a simulated system without liquid in the past [1] , we have developed a new system to inspect real liquid components. Small cylindrical metallic contaminant samples were fabricated using a gallium-focused ion beam to evaluate the detection performance. Tap water containing the metallic contaminant sample was poured into the tube using a pump, and the magnetic signal of the contaminant matter was detected using the RF-SQUID. Among the tested small metallic contaminant samples, the volume of a minimum detectable metallic contaminant was evaluated to be 2 × 10 4 μm 3 , which corresponded to that of a spherical sample with a diameter of 33 μm and a sensitivity of a signal-to-noise ratio of more than three. Moreover, the dependence of the detected signal strength on the volume of the metallic contaminant samples is discussed here.