Magnetic Properties and Morphology Copper-Substituted Barium Hexaferrites from Sol-Gel Auto-Combustion Synthesis
The copper (Cu) substitution in barium hexaferrite (BaFe<sub>12</sub>O<sub>19</sub>) crystals from the sol-gel auto-combustion synthesis is demonstrated as a cost-effective pathway to achieve alterable magnetic properties. Subsequent heat treatments at 450 °C and 1050 °C resu...
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| author | Abdulmumeen Lohmaah Komkrich Chokprasombat Supree Pinitsoontorn Chitnarong Sirisathitkul |
| author_facet | Abdulmumeen Lohmaah Komkrich Chokprasombat Supree Pinitsoontorn Chitnarong Sirisathitkul |
| author_sort | Abdulmumeen Lohmaah |
| collection | DOAJ |
| description | The copper (Cu) substitution in barium hexaferrite (BaFe<sub>12</sub>O<sub>19</sub>) crystals from the sol-gel auto-combustion synthesis is demonstrated as a cost-effective pathway to achieve alterable magnetic properties. Subsequent heat treatments at 450 °C and 1050 °C result in irregularly shaped nanoparticles characterized as the M-type BaFe<sub>12</sub>O<sub>19</sub> with the secondary phase of hematite (α-Fe<sub>2</sub>O<sub>3</sub>). Despite the mixed phase, the substantial coercivity of 2626 Oe and magnetization as high as 74.8 emu/g are obtained in this undoped ferrite. The copper (Cu) doing strongly affects morphology and magnetic properties of BaFe<sub>12−x</sub>Cu<sub>x</sub>O<sub>19</sub> (x = 0.1, 0.3, and 0.5). The majority of particles become microrods for x = 0.1 and microplates in the case of x = 0.3 and 0.5. The coercivity and magnetization tend to reduce as Cu<sup>2+</sup> increasingly substitutes Fe<sup>3+</sup>. From these findings, magnetic properties for various applications in microwave absorbers, recording media, electrodes, and permanent magnets can be tailored by the partial substitution in hexaferrite crystals. |
| first_indexed | 2024-03-10T06:55:47Z |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T06:55:47Z |
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| spelling | doaj.art-2e1ef758435d4af4b300e37cfb9ba0282023-11-22T16:28:29ZengMDPI AGMaterials1996-19442021-10-011419587310.3390/ma14195873Magnetic Properties and Morphology Copper-Substituted Barium Hexaferrites from Sol-Gel Auto-Combustion SynthesisAbdulmumeen Lohmaah0Komkrich Chokprasombat1Supree Pinitsoontorn2Chitnarong Sirisathitkul3Department of Physics, Faculty of Science, Thaksin University, Phatthalung 93210, ThailandDepartment of Physics, Faculty of Science, Thaksin University, Phatthalung 93210, ThailandInstitute of Nanomaterials Research and Innovation for Energy (IN-RIE), Khon Kaen University, Khon Kaen 40002, ThailandDepartment of Physics, Faculty of Science, Walailak University, Nakhon Si Thammarat 80160, ThailandThe copper (Cu) substitution in barium hexaferrite (BaFe<sub>12</sub>O<sub>19</sub>) crystals from the sol-gel auto-combustion synthesis is demonstrated as a cost-effective pathway to achieve alterable magnetic properties. Subsequent heat treatments at 450 °C and 1050 °C result in irregularly shaped nanoparticles characterized as the M-type BaFe<sub>12</sub>O<sub>19</sub> with the secondary phase of hematite (α-Fe<sub>2</sub>O<sub>3</sub>). Despite the mixed phase, the substantial coercivity of 2626 Oe and magnetization as high as 74.8 emu/g are obtained in this undoped ferrite. The copper (Cu) doing strongly affects morphology and magnetic properties of BaFe<sub>12−x</sub>Cu<sub>x</sub>O<sub>19</sub> (x = 0.1, 0.3, and 0.5). The majority of particles become microrods for x = 0.1 and microplates in the case of x = 0.3 and 0.5. The coercivity and magnetization tend to reduce as Cu<sup>2+</sup> increasingly substitutes Fe<sup>3+</sup>. From these findings, magnetic properties for various applications in microwave absorbers, recording media, electrodes, and permanent magnets can be tailored by the partial substitution in hexaferrite crystals.https://www.mdpi.com/1996-1944/14/19/5873barium hexaferritesol-gel auto-combustionmorphologymagnetizationcoercivity |
| spellingShingle | Abdulmumeen Lohmaah Komkrich Chokprasombat Supree Pinitsoontorn Chitnarong Sirisathitkul Magnetic Properties and Morphology Copper-Substituted Barium Hexaferrites from Sol-Gel Auto-Combustion Synthesis Materials barium hexaferrite sol-gel auto-combustion morphology magnetization coercivity |
| title | Magnetic Properties and Morphology Copper-Substituted Barium Hexaferrites from Sol-Gel Auto-Combustion Synthesis |
| title_full | Magnetic Properties and Morphology Copper-Substituted Barium Hexaferrites from Sol-Gel Auto-Combustion Synthesis |
| title_fullStr | Magnetic Properties and Morphology Copper-Substituted Barium Hexaferrites from Sol-Gel Auto-Combustion Synthesis |
| title_full_unstemmed | Magnetic Properties and Morphology Copper-Substituted Barium Hexaferrites from Sol-Gel Auto-Combustion Synthesis |
| title_short | Magnetic Properties and Morphology Copper-Substituted Barium Hexaferrites from Sol-Gel Auto-Combustion Synthesis |
| title_sort | magnetic properties and morphology copper substituted barium hexaferrites from sol gel auto combustion synthesis |
| topic | barium hexaferrite sol-gel auto-combustion morphology magnetization coercivity |
| url | https://www.mdpi.com/1996-1944/14/19/5873 |
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