Mechanochemical treatment of BaFe12O19 - Mossbauer investigation

E. Wu; S. J. Campbell; W. A. Kaczmarek; M. Hofmann

doi:10.4028/www.scientific.net/MSF.312-314.127

Mechanochemical treatment of BaFe₁₂O₁₉ - Mossbauer investigation

E. Wu^*, S. J. Campbell, W. A. Kaczmarek, M. Hofmann

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

The structural and stoichiometric changes which occur on milling barium ferrite, BaFe₁₂O₁₉, powder in vacuum and air for up to 1000 h have been investigated by X-ray diffraction and Mossbauer effect spectroscopy (room temperature and 4.2 K). Mechanochemical treatment causes BaFe₁₂O₁₉ to transform progressively to disordered material, incorporating nanocrystalline and amorphous phases, with chemical reduction to haematite, α-Fe₂O₃. Superparamagnetic relaxation effects associated with the nanoscale particles are evident in the Mossbauer spectra.

Original language	English
Pages (from-to)	127-132
Number of pages	6
Journal	Materials Science Forum
Volume	312
DOIs	https://doi.org/10.4028/www.scientific.net/MSF.312-314.127
Publication status	Published - 1999
Event	Proceedings of the 1998 International Symposium on Metastable, Mechanical Alloyed and Nanocrystalline Materials, ISMANAM-98 - Wollongong, Sydney, Aust Duration: 7 Dec 1998 → 12 Dec 1998

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title = "Mechanochemical treatment of BaFe12O19 - Mossbauer investigation",

abstract = "The structural and stoichiometric changes which occur on milling barium ferrite, BaFe12O19, powder in vacuum and air for up to 1000 h have been investigated by X-ray diffraction and Mossbauer effect spectroscopy (room temperature and 4.2 K). Mechanochemical treatment causes BaFe12O19 to transform progressively to disordered material, incorporating nanocrystalline and amorphous phases, with chemical reduction to haematite, α-Fe2O3. Superparamagnetic relaxation effects associated with the nanoscale particles are evident in the Mossbauer spectra.",

author = "E. Wu and Campbell, {S. J.} and Kaczmarek, {W. A.} and M. Hofmann",

year = "1999",

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journal = "Materials Science Forum",

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note = "Proceedings of the 1998 International Symposium on Metastable, Mechanical Alloyed and Nanocrystalline Materials, ISMANAM-98 ; Conference date: 07-12-1998 Through 12-12-1998",

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AU - Wu, E.

AU - Campbell, S. J.

AU - Kaczmarek, W. A.

AU - Hofmann, M.

PY - 1999

Y1 - 1999

N2 - The structural and stoichiometric changes which occur on milling barium ferrite, BaFe12O19, powder in vacuum and air for up to 1000 h have been investigated by X-ray diffraction and Mossbauer effect spectroscopy (room temperature and 4.2 K). Mechanochemical treatment causes BaFe12O19 to transform progressively to disordered material, incorporating nanocrystalline and amorphous phases, with chemical reduction to haematite, α-Fe2O3. Superparamagnetic relaxation effects associated with the nanoscale particles are evident in the Mossbauer spectra.

AB - The structural and stoichiometric changes which occur on milling barium ferrite, BaFe12O19, powder in vacuum and air for up to 1000 h have been investigated by X-ray diffraction and Mossbauer effect spectroscopy (room temperature and 4.2 K). Mechanochemical treatment causes BaFe12O19 to transform progressively to disordered material, incorporating nanocrystalline and amorphous phases, with chemical reduction to haematite, α-Fe2O3. Superparamagnetic relaxation effects associated with the nanoscale particles are evident in the Mossbauer spectra.

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U2 - 10.4028/www.scientific.net/MSF.312-314.127

DO - 10.4028/www.scientific.net/MSF.312-314.127

M3 - Conference article

SN - 0255-5476

VL - 312

SP - 127

EP - 132

JO - Materials Science Forum

JF - Materials Science Forum

T2 - Proceedings of the 1998 International Symposium on Metastable, Mechanical Alloyed and Nanocrystalline Materials, ISMANAM-98

Y2 - 7 December 1998 through 12 December 1998

ER -

Mechanochemical treatment of BaFe₁₂O₁₉ - Mossbauer investigation

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