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Structural and physical characterization of iron-oxide based inks for inkjet printing
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SYSNO ASEP 0560995 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Structural and physical characterization of iron-oxide based inks for inkjet printing Author(s) Jirásková, Yvonna (UFM-A) RID, ORCID
Zažímal, František (UFM-A)
Buršík, Jiří (UFM-A) RID, ORCID
Svoboda, T. (CZ)
Dzik, P. (CZ)
Homola, T. (CZ)Number of authors 6 Article number 169810 Source Title Journal of Magnetism and Magnetic Materials. - : Elsevier - ISSN 0304-8853
Roč. 562, NOV (2022)Number of pages 11 s. Language eng - English Country NL - Netherlands Keywords Iron-oxide nanoparticles ; Magnetic inks ; Inkjet printing ; Microstructure Subject RIV JJ - Other Materials OECD category Nano-materials (production and properties) Method of publishing Limited access Institutional support UFM-A - RVO:68081723 UT WOS 000854522400007 EID SCOPUS 85137160069 DOI 10.1016/j.jmmm.2022.169810 Annotation Iron-oxide nanopowders, hematite and magnetite, are basic compounds applied in several steps for the preparation of magnetic inks. These steps included ball milling of the nanopowders in dowanol, mixing with polysiloxane binder dissolved in pure ethanol, and final dilution in hexanol to adjust the rheological parameters of the inks applied in the inkjet printing technology under ambient conditions. Various experimental methods, carried out for the samples in all forms (powder, ink, and layer), have yielded basic data concerning morphology, chemical, and physical properties and allowed to follow their changes during individual processing steps. The phase analysis of both the pristine iron-oxides did not confirm the pure single-phase compositions. The hematite contained also a substantial amount of magnetite and maghemite contributing to its unusual high saturation magnetization, Ms, of 66 Am2kg−1. The magnetite contained about 38 % maghemite and its Ms was 117 Am2kg−1. The magnetic parameters of both the iron-oxides in the nanopowder and ink forms were comparable contrary to those measured in the solidified state after printing. Substantial decrease in the Ms values and changes of the remnant magnetization and coercivity were observed in both cases. The obtained results were verified by measurement of a designed magnetite core printed on the flexible foil and tested as a magnetic sensor. Nevertheless, despite the worse magnetic parameters, the relative permeability, approximately 2, was twice as high as that reported by other authors. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2023 Electronic address https://www.sciencedirect.com/science/article/pii/S0304885322007041?via%3Dihub
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