α-Fe2O3 nano-platelets prepared by mechanochemical/thermal processing

T. Tsuzuki; F. Schäffel; M. Muroi; P. G. McCormick

doi:10.1016/j.powtec.2011.03.012

α-Fe₂O₃ nano-platelets prepared by mechanochemical/thermal processing

T. Tsuzuki^*, F. Schäffel, M. Muroi, P. G. McCormick

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

A new method to prepare plate-shaped Fe₂O₃ nanoparticles was investigated and their magnetic properties were characterised. First, Fe₂O₃ nanoparticles of ~6nm in diameter were synthesised by mechanochemical processing, involving the solid-state exchange reaction Fe₂(SO₄)₃+3 Na₂CO₃→Fe₂(CO₃)₃+3 Na₂SO₄→Fe₂O₃+3 Na₂SO₄+ 3 CO₂ (g) effected by high-energy ball milling and subsequent heat treatment at 400°C. Next, nano-platelets were grown from the nanoparticles by further heat treatment in a salt matrix at 700°C. Removal of the salt and by-product phases after heat treatment led to well-dispersed platy haematite particles of 20-200nm in diameter with aspect ratio of 4-10. The hematite nano-platelets were weakly ferromagnetic with coercivity of ~160Oe and remanent magnetisation of 0.2emu/g.

Original language	English
Pages (from-to)	198-202
Number of pages	5
Journal	Powder Technology
Volume	210
Issue number	3
DOIs	https://doi.org/10.1016/j.powtec.2011.03.012
Publication status	Published - 10 Jul 2011
Externally published	Yes

Access to Document

10.1016/j.powtec.2011.03.012

Cite this

@article{d66e9874164c46f3a67f6a8cadbf797b,

title = "α-Fe2O3 nano-platelets prepared by mechanochemical/thermal processing",

abstract = "A new method to prepare plate-shaped Fe2O3 nanoparticles was investigated and their magnetic properties were characterised. First, Fe2O3 nanoparticles of ~6nm in diameter were synthesised by mechanochemical processing, involving the solid-state exchange reaction Fe2(SO4)3+3 Na2CO3→Fe2(CO3)3+3 Na2SO4→Fe2O3+3 Na2SO4+ 3 CO2 (g) effected by high-energy ball milling and subsequent heat treatment at 400°C. Next, nano-platelets were grown from the nanoparticles by further heat treatment in a salt matrix at 700°C. Removal of the salt and by-product phases after heat treatment led to well-dispersed platy haematite particles of 20-200nm in diameter with aspect ratio of 4-10. The hematite nano-platelets were weakly ferromagnetic with coercivity of ~160Oe and remanent magnetisation of 0.2emu/g.",

keywords = "Ball milling, Magnetic properties, Nanoparticles, Platelets",

author = "T. Tsuzuki and F. Sch{\"a}ffel and M. Muroi and McCormick, {P. G.}",

year = "2011",

month = jul,

day = "10",

doi = "10.1016/j.powtec.2011.03.012",

language = "English",

volume = "210",

pages = "198--202",

journal = "Powder Technology",

issn = "0032-5910",

publisher = "Elsevier B.V.",

number = "3",

}

TY - JOUR

T1 - α-Fe2O3 nano-platelets prepared by mechanochemical/thermal processing

AU - Tsuzuki, T.

AU - Schäffel, F.

AU - Muroi, M.

AU - McCormick, P. G.

PY - 2011/7/10

Y1 - 2011/7/10

N2 - A new method to prepare plate-shaped Fe2O3 nanoparticles was investigated and their magnetic properties were characterised. First, Fe2O3 nanoparticles of ~6nm in diameter were synthesised by mechanochemical processing, involving the solid-state exchange reaction Fe2(SO4)3+3 Na2CO3→Fe2(CO3)3+3 Na2SO4→Fe2O3+3 Na2SO4+ 3 CO2 (g) effected by high-energy ball milling and subsequent heat treatment at 400°C. Next, nano-platelets were grown from the nanoparticles by further heat treatment in a salt matrix at 700°C. Removal of the salt and by-product phases after heat treatment led to well-dispersed platy haematite particles of 20-200nm in diameter with aspect ratio of 4-10. The hematite nano-platelets were weakly ferromagnetic with coercivity of ~160Oe and remanent magnetisation of 0.2emu/g.

AB - A new method to prepare plate-shaped Fe2O3 nanoparticles was investigated and their magnetic properties were characterised. First, Fe2O3 nanoparticles of ~6nm in diameter were synthesised by mechanochemical processing, involving the solid-state exchange reaction Fe2(SO4)3+3 Na2CO3→Fe2(CO3)3+3 Na2SO4→Fe2O3+3 Na2SO4+ 3 CO2 (g) effected by high-energy ball milling and subsequent heat treatment at 400°C. Next, nano-platelets were grown from the nanoparticles by further heat treatment in a salt matrix at 700°C. Removal of the salt and by-product phases after heat treatment led to well-dispersed platy haematite particles of 20-200nm in diameter with aspect ratio of 4-10. The hematite nano-platelets were weakly ferromagnetic with coercivity of ~160Oe and remanent magnetisation of 0.2emu/g.

KW - Ball milling

KW - Magnetic properties

KW - Nanoparticles

KW - Platelets

UR - http://www.scopus.com/inward/record.url?scp=79955923960&partnerID=8YFLogxK

U2 - 10.1016/j.powtec.2011.03.012

DO - 10.1016/j.powtec.2011.03.012

M3 - Article

SN - 0032-5910

VL - 210

SP - 198

EP - 202

JO - Powder Technology

JF - Powder Technology

IS - 3

ER -

α-Fe₂O₃ nano-platelets prepared by mechanochemical/thermal processing

Abstract

Access to Document

Other files and links

Fingerprint

Cite this