Improving heat generation of magnetic nanoparticles by pre-orientation of particles in a static three tesla magnetic field.
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| Title: | Improving heat generation of magnetic nanoparticles by pre-orientation of particles in a static three tesla magnetic field. |
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| Authors: | Beck, Mathias M.1 Mathias.Beck@tum.de, Lammel, Christian1, Gleich, Bernhard2 |
| Source: | Journal of Magnetism & Magnetic Materials. Apr2017, Vol. 427, p195-199. 5p. |
| Subjects: | Magnetic nanoparticles, Reinforced thermoplastics, Thermal conductivity, Thermoplastics, Magnetic fields, Magnetic moments |
| Abstract: | Inductive heating of electrically insulating materials like fiberglass reinforced thermoplastics (FRTP) without susceptors is not possible. However, due to their low thermal conductivity a volumetric heat generation method is advisable to reach short heating times to melt this material for reshaping. This can be done with magnetic nanoparticles as susceptors within the thermoplastic of the FRTP using Néel relaxation. During the heating process the particle's magnetic moment rotates with the field while the particle itself is fixed within the thermoplastic. Therefore the heat dissipation of each particle depends on its orientation within the field. To achieve the maximum heat generation of the particles we pre-oriented the particles within a plastic at the best angle to the applied AC field for induction. To do this, five mass percent nanoparticles were dispersed in an epoxy resin, which was then hardened at room temperature in a static three Tesla magnetic field. After its solidification the heating behavior of the sample was compared to a reference sample, which was hardened without a field. The oriented particles showed an increased heating rate when oriented parallel to the applied AC field. The absorption rate was 3.3 times as high as the undirected reference sample. When the alternating electromagnetic field was perpendicular to the oriented particles, the specific absorption rate was similar to that of the reference sample. We compare this result with theory and with calculations from literature, and conduct a numerical simulation. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Magnetism & Magnetic Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 120797727 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Improving heat generation of magnetic nanoparticles by pre-orientation of particles in a static three tesla magnetic field. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Beck%2C+Mathias+M%2E%22">Beck, Mathias M.</searchLink><relatesTo>1</relatesTo><i> Mathias.Beck@tum.de</i><br /><searchLink fieldCode="AR" term="%22Lammel%2C+Christian%22">Lammel, Christian</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gleich%2C+Bernhard%22">Gleich, Bernhard</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Magnetism+%26+Magnetic+Materials%22">Journal of Magnetism & Magnetic Materials</searchLink>. Apr2017, Vol. 427, p195-199. 5p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Magnetic+nanoparticles%22">Magnetic nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Reinforced+thermoplastics%22">Reinforced thermoplastics</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+conductivity%22">Thermal conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoplastics%22">Thermoplastics</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+moments%22">Magnetic moments</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Inductive heating of electrically insulating materials like fiberglass reinforced thermoplastics (FRTP) without susceptors is not possible. However, due to their low thermal conductivity a volumetric heat generation method is advisable to reach short heating times to melt this material for reshaping. This can be done with magnetic nanoparticles as susceptors within the thermoplastic of the FRTP using Néel relaxation. During the heating process the particle's magnetic moment rotates with the field while the particle itself is fixed within the thermoplastic. Therefore the heat dissipation of each particle depends on its orientation within the field. To achieve the maximum heat generation of the particles we pre-oriented the particles within a plastic at the best angle to the applied AC field for induction. To do this, five mass percent nanoparticles were dispersed in an epoxy resin, which was then hardened at room temperature in a static three Tesla magnetic field. After its solidification the heating behavior of the sample was compared to a reference sample, which was hardened without a field. The oriented particles showed an increased heating rate when oriented parallel to the applied AC field. The absorption rate was 3.3 times as high as the undirected reference sample. When the alternating electromagnetic field was perpendicular to the oriented particles, the specific absorption rate was similar to that of the reference sample. We compare this result with theory and with calculations from literature, and conduct a numerical simulation. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Magnetism & Magnetic Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jmmm.2016.11.005 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 5 StartPage: 195 Subjects: – SubjectFull: Magnetic nanoparticles Type: general – SubjectFull: Reinforced thermoplastics Type: general – SubjectFull: Thermal conductivity Type: general – SubjectFull: Thermoplastics Type: general – SubjectFull: Magnetic fields Type: general – SubjectFull: Magnetic moments Type: general Titles: – TitleFull: Improving heat generation of magnetic nanoparticles by pre-orientation of particles in a static three tesla magnetic field. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Beck, Mathias M. – PersonEntity: Name: NameFull: Lammel, Christian – PersonEntity: Name: NameFull: Gleich, Bernhard IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 03048853 Numbering: – Type: volume Value: 427 Titles: – TitleFull: Journal of Magnetism & Magnetic Materials Type: main |
| ResultId | 1 |
