Sintering in seconds, elucidated by millisecond in situ diffraction

Shyam, Priyank; Gjørup, Frederik H.; Mørch, Mathias I.; Laursen, Amalie P.; Eikeland, Anna Z.; Kantor, Innokenty; Jørgensen, Mads R.V.; Christensen, Mogens

doi:10.1016/j.apmt.2023.101960

Applied Materials Today

2023

DOI: 10.1016/j.apmt.2023.101960

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Sintering in seconds, elucidated by millisecond in situ diffraction

Priyank Shyam,

Frederik H. Gjørup,

Mathias I. Mørch

et al.

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2024

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

Laursen,

Frandsen,

Shyam

et al. 2024

Adv Elect Materials

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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.

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

Laursen,

Frandsen,

Shyam

et al. 2024

Adv Elect Materials

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show abstract

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Sintering in seconds, elucidated by millisecond in situ diffraction

Cited by 1 publication

References 83 publications

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

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

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