Aligned Permanent Magnet Made in Seconds–An In Situ Diffraction Study

Autor:	Amalie P. Laursen, Jens P. Frandsen, Priyank Shyam, Mathias I. Mørch, Frederik H. Gjørup, Harikrishnan Vijayan, Mads R. V. Jørgensen, Mogens Christensen
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	combined texture and Rietveld analysis electron backscatter diffraction in situ X‐ray diffraction permanent magnets strontium hexaferrite ultrafast sintering Electric apparatus and materials. Electric circuits. Electric networks TK452-454.4 Physics QC1-999
Zdroj:	Advanced Electronic Materials, Vol 10, Iss 9, Pp n/a-n/a (2024)
Druh dokumentu:	article
ISSN:	2199-160X 20240007
DOI:	10.1002/aelm.202400077
Popis:	Abstract The synthesis of a strontium hexaferrite magnet is studied using in situ synchrotron powder X‐ray diffraction (PXRD) with a 16‐ms time resolution. The precursor material is cold compacted shape‐controlled goethite and strontium carbonate. The time evolution of the phases is modeled with sequential Rietveld refinements revealing that strontium hexaferrite forms within seconds at ≈1173 K. Texture analysis is performed on selected PXRD frames throughout the experiment, and the preferred orientation introduced by cold‐pressing goethite prevails through the iron oxide phase transitions (goethite → hematite → strontium hexaferrite). Electron backscatter diffraction (EBSD) data on the final pellet confirms the preferred orientation observed with PXRD. The resulting magnet has respectable magnetic properties, considering the simplicity of the preparation method, with an energy product (BHmax) of 18.6(8) kJ m−3.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/5836fd885e664ebaa1066ae26f24a757 Zobrazit plný text záznamu Plný text View record in DOAJ