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Synthesis of barium hexaferrite nano-platelets for ethylene glycol ferrofluids

Ahmed, Yusra, Paul, Alison ORCID: https://orcid.org/0000-0002-7653-9964, Hribar Boštjančič, Patricija, Lisjak, Darja, Mertelj, Alenka and Zabek, Daniel ORCID: https://orcid.org/0000-0001-5856-5301 2023. Synthesis of barium hexaferrite nano-platelets for ethylene glycol ferrofluids. Journal of Materials Chemistry C 11 (45) , pp. 16066-16073. 10.1039/D3TC03833E

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Abstract

Recently discovered barium hexaferrite (BaFe12O19) – based nanoplatelets form a ferromagnetic-ferrofluid which exhibits interesting magnetic properties. Manufacturing the barium hexaferrite nano-platelets via hydrothermal synthesis remains of fundamental interest and allows for optimisation of structural, magnetic, and morphological properties, which impact on ferrofluid properties. This report describes a surfactant assisted manufacturing method for an ethylene glycol based ferrofluid using hexadecyltrimethylammonium bromide (CTAB) with barium hexaferrite nano – platelets. A hexagonal nano – platelet morphology with a typical diameter up to 200 nm and thickness of a few nanometres was observed by Transmission Electron Microscopy (TEM) with stable concentrations between 10 – 200 mg/ml, while saturation magnetisation of dry particles was measured at 32.8 Am2 /kg using a Vibrating Sample Magnetometer (VSM). The manufactured barium hexaferrite - ethylene glycol ferrofluid exhibits improved thermal properties compared to previously used butanol based ferrofluids opening the way into new applications in the field of colloidal suspensions

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Engineering
Subjects: Q Science > QD Chemistry
Publisher: Royal Society of Chemistry
ISSN: 2050-7526
Funders: Royal Academy of Engineering, Slovenian Research Agency
Date of First Compliant Deposit: 16 January 2024
Date of Acceptance: 3 November 2023
Last Modified: 16 Jan 2024 14:25
URI: https://orca.cardiff.ac.uk/id/eprint/163672

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