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Impedance spectroscopy for multi-state analysis of dissolvable powders: determining layer thickness and moisture content
Citation Link: https://doi.org/10.15480/882.16931
Publikationstyp
Journal Article
Date Issued
2026-03-27
Sprache
English
Author(s)
TORE-DOI
Journal
Volume
478
Article Number
122493
Citation
Powder Technology 478: 122493 (2026)
Publisher DOI
Scopus ID
Publisher
Elsevier BV
This study presents a novel methodology for applying Electrical Impedance Spectroscopy to analyze the electrical properties of dissolvable powders, when applied as a coating layer to quantify their thickness and moisture content. To address challenges posed by undefined geometries, powders were dissolved and applied as coatings on custom-designed Printed Circuit Board electrodes. Using sodium benzoate as a model material, the drying process was monitored in off-line measurements, revealing distinct transitions in electrical properties. Impedance and phase angle measurements effectively tracked moisture reduction during drying, while coating thickness and solution concentration also influenced conductivity. The findings demonstrate the potential of this approach for industrial applications, such as fluidized bed spray granulation, by enabling real-time monitoring of drying states.
Subjects
Electrical Impedance Spectroscopy
Fluidized bed coating
SMART particle
DDC Class
537: Electricity and Electronics
621.38: Electronics, Communications Engineering
540: Chemistry
620.11: Engineering Materials
Publication version
publishedVersion
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Name
1-s2.0-S0032591026003827-main.pdf
Type
Main Article
Size
2.7 MB
Format
Adobe PDF