MAGNETOCALORIC EFFECTS OF BARIUM-STRONTIUM FERRITES FOR MAGNETIC REFRIGERATION SYSTEM
A study of the magnetocaloric effect (MCE) of Barium-Strontium-Ferrites BaO•SrO•xFe2O3 and BaO•SrO•xFe3O4 (x=5.6, 5.8, 6) is reported in this article. Using hematite of analytical grade and magnetite from Cox’s Bazar beach sand mineral as ferrite contents, the hexaferrites were synthesized and their...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Politehnium Publishing House
2018-12-01
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| Series: | European Journal of Materials Science and Engineering |
| Subjects: | |
| Online Access: | http://ejmse.tuiasi.ro/articles/EJMSE_03_04_04_Habiba.pdf |
| Summary: | A study of the magnetocaloric effect (MCE) of Barium-Strontium-Ferrites BaO•SrO•xFe2O3 and BaO•SrO•xFe3O4 (x=5.6, 5.8, 6) is reported in this article. Using hematite of analytical grade and magnetite from Cox’s Bazar beach sand mineral as ferrite contents, the hexaferrites were synthesized and their magnetic properties and MCE were systematically studied. The results indicate that the samples are strongly ferromagnetic and have high Curie temperature. All the samples are of second-ordered phase and exhibit large magnetic entropy changes. Among all the samples BaO•SrO•5.8Fe2O3 and BaO•SrO•5.8Fe3O4 exhibit the maximum entropy changes at the temperatures near and below the Curie temperature. |
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| ISSN: | 2537-4338 2537-4346 |