Structural investigation of milled α-Fe and barium ferrite nano-mixtures

W. A. Kaczmarek; S. J. Campbell; M. Schmidt

doi:10.4028/www.scientific.net/msf.312-314.197

Structural investigation of milled α-Fe and barium ferrite nano-mixtures

W. A. Kaczmarek^*, S. J. Campbell, M. Schmidt

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

Milling BaFe₁₂O₁₉ powder in air for 500 h results in decomposition of the barium ferrite structure and formation of nanocrystalline hematite and BaO. Addition of 20 or 40% wt. α-Fe to the pre-milled material followed by a further 150 h milling in vacuum, results in the formation of nanocrystalline multiphase mixtures. Comparison of the effects of static annealing at 1000°C for 2 h with time-dependent annealing (10-50 min) at 800°C of the milled (α-Fe + BaFe₁₂O₁₉) products, reveals the formation of a mixture of ultrafine defect Fe_1-xO and α-Fe phases in the short term treatments.

Original language	English
Pages (from-to)	197-202
Number of pages	6
Journal	Materials Science Forum
Volume	312
DOIs	https://doi.org/10.4028/www.scientific.net/msf.312-314.197
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 = "Structural investigation of milled α-Fe and barium ferrite nano-mixtures",

abstract = "Milling BaFe12O19 powder in air for 500 h results in decomposition of the barium ferrite structure and formation of nanocrystalline hematite and BaO. Addition of 20 or 40% wt. α-Fe to the pre-milled material followed by a further 150 h milling in vacuum, results in the formation of nanocrystalline multiphase mixtures. Comparison of the effects of static annealing at 1000°C for 2 h with time-dependent annealing (10-50 min) at 800°C of the milled (α-Fe + BaFe12O19) products, reveals the formation of a mixture of ultrafine defect Fe1-xO and α-Fe phases in the short term treatments.",

author = "Kaczmarek, {W. A.} and Campbell, {S. J.} and M. Schmidt",

year = "1999",

doi = "10.4028/www.scientific.net/msf.312-314.197",

language = "English",

volume = "312",

pages = "197--202",

journal = "Materials Science Forum",

issn = "0255-5476",

publisher = "Trans Tech Publications Ltd.",

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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TY - JOUR

T1 - Structural investigation of milled α-Fe and barium ferrite nano-mixtures

AU - Kaczmarek, W. A.

AU - Campbell, S. J.

AU - Schmidt, M.

PY - 1999

Y1 - 1999

N2 - Milling BaFe12O19 powder in air for 500 h results in decomposition of the barium ferrite structure and formation of nanocrystalline hematite and BaO. Addition of 20 or 40% wt. α-Fe to the pre-milled material followed by a further 150 h milling in vacuum, results in the formation of nanocrystalline multiphase mixtures. Comparison of the effects of static annealing at 1000°C for 2 h with time-dependent annealing (10-50 min) at 800°C of the milled (α-Fe + BaFe12O19) products, reveals the formation of a mixture of ultrafine defect Fe1-xO and α-Fe phases in the short term treatments.

AB - Milling BaFe12O19 powder in air for 500 h results in decomposition of the barium ferrite structure and formation of nanocrystalline hematite and BaO. Addition of 20 or 40% wt. α-Fe to the pre-milled material followed by a further 150 h milling in vacuum, results in the formation of nanocrystalline multiphase mixtures. Comparison of the effects of static annealing at 1000°C for 2 h with time-dependent annealing (10-50 min) at 800°C of the milled (α-Fe + BaFe12O19) products, reveals the formation of a mixture of ultrafine defect Fe1-xO and α-Fe phases in the short term treatments.

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U2 - 10.4028/www.scientific.net/msf.312-314.197

DO - 10.4028/www.scientific.net/msf.312-314.197

M3 - Conference article

SN - 0255-5476

VL - 312

SP - 197

EP - 202

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 -

Structural investigation of milled α-Fe and barium ferrite nano-mixtures

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