Investigation of the precursors of γ-Fe
                        2
                        O
                        3
                         in Fe
                        2
                        O
                        3
                        /SiO
                        2
                         nanocomposites obtained through sol-gel

C. Cannas; G. Concas; Andrea Falqui; A. Musinu; G. Spano; G. Piccaluga

doi:10.1016/S0022-3093(01)00504-X

Investigation of the precursors of γ-Fe ₂ O ₃ in Fe ₂ O ₃ /SiO ₂ nanocomposites obtained through sol-gel

C. Cannas, G. Concas, Andrea Falqui, A. Musinu^*, G. Spano, G. Piccaluga

^*Corresponding author for this work

Biological, Environmental Sciences and Engineering

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

34 Scopus citations

Abstract

The structure and the magnetic properties of a series of Fe ₂ O ₃ -SiO ₂ nanocomposites (16.9 and 28.5 wt% of Fe ₂ O ₃ /(Fe ₂ O ₃ + SiO ₂ )), prepared by a sol-gel method and submitted to thermal treatments in a temperature range 300-700°C, were investigated through X-ray diffraction (XRD), transmission electron microscopy (TEM), Mössbauer spectroscopy and magnetometry. Poorly crystallized particles, belonging to the 2-line ferrihydrite phase, were found in all the samples and recognized as precursors of the γ-Fe ₂ O ₃ that form in Fe ₂ O ₃ -SiO ₂ nanocomposites at T > 700°C. The result was achieved through a detailed comparison of structural and magnetic properties of nanocomposites with a bulk iron (III) oxide hydrated reference sample.

Original language	English (US)
Pages (from-to)	64-73
Number of pages	10
Journal	Journal of Non-Crystalline Solids
Volume	286
Issue number	1-2
DOIs	https://doi.org/10.1016/S0022-3093(01)00504-X
State	Published - Jun 1 2001

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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Cannas, C., Concas, G., Falqui, A., Musinu, A., Spano, G., & Piccaluga, G. (2001). Investigation of the precursors of γ-Fe ₂ O ₃ in Fe ₂ O ₃ /SiO ₂ nanocomposites obtained through sol-gel Journal of Non-Crystalline Solids, 286(1-2), 64-73. https://doi.org/10.1016/S0022-3093(01)00504-X

Cannas, C. ; Concas, G. ; Falqui, Andrea et al. / Investigation of the precursors of γ-Fe ₂ O ₃ in Fe ₂ O ₃ /SiO ₂ nanocomposites obtained through sol-gel In: Journal of Non-Crystalline Solids. 2001 ; Vol. 286, No. 1-2. pp. 64-73.

@article{162d5f9143f34fc592b5645104211491,

title = " Investigation of the precursors of γ-Fe 2 O 3 in Fe 2 O 3 /SiO 2 nanocomposites obtained through sol-gel ",

abstract = " The structure and the magnetic properties of a series of Fe 2 O 3 -SiO 2 nanocomposites (16.9 and 28.5 wt% of Fe 2 O 3 /(Fe 2 O 3 + SiO 2 )), prepared by a sol-gel method and submitted to thermal treatments in a temperature range 300-700°C, were investigated through X-ray diffraction (XRD), transmission electron microscopy (TEM), M{\"o}ssbauer spectroscopy and magnetometry. Poorly crystallized particles, belonging to the 2-line ferrihydrite phase, were found in all the samples and recognized as precursors of the γ-Fe 2 O 3 that form in Fe 2 O 3 -SiO 2 nanocomposites at T > 700°C. The result was achieved through a detailed comparison of structural and magnetic properties of nanocomposites with a bulk iron (III) oxide hydrated reference sample.",

author = "C. Cannas and G. Concas and Andrea Falqui and A. Musinu and G. Spano and G. Piccaluga",

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Cannas, C, Concas, G, Falqui, A, Musinu, A, Spano, G & Piccaluga, G 2001, ' Investigation of the precursors of γ-Fe ₂ O ₃ in Fe ₂ O ₃ /SiO ₂ nanocomposites obtained through sol-gel ', Journal of Non-Crystalline Solids, vol. 286, no. 1-2, pp. 64-73. https://doi.org/10.1016/S0022-3093(01)00504-X

Investigation of the precursors of γ-Fe ₂ O ₃ in Fe ₂ O ₃ /SiO ₂ nanocomposites obtained through sol-gel . / Cannas, C.; Concas, G.; Falqui, Andrea et al.
In: Journal of Non-Crystalline Solids, Vol. 286, No. 1-2, 01.06.2001, p. 64-73.

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

TY - JOUR

T1 - Investigation of the precursors of γ-Fe 2 O 3 in Fe 2 O 3 /SiO 2 nanocomposites obtained through sol-gel

AU - Cannas, C.

AU - Concas, G.

AU - Falqui, Andrea

AU - Musinu, A.

AU - Spano, G.

AU - Piccaluga, G.

PY - 2001/6/1

Y1 - 2001/6/1

N2 - The structure and the magnetic properties of a series of Fe 2 O 3 -SiO 2 nanocomposites (16.9 and 28.5 wt% of Fe 2 O 3 /(Fe 2 O 3 + SiO 2 )), prepared by a sol-gel method and submitted to thermal treatments in a temperature range 300-700°C, were investigated through X-ray diffraction (XRD), transmission electron microscopy (TEM), Mössbauer spectroscopy and magnetometry. Poorly crystallized particles, belonging to the 2-line ferrihydrite phase, were found in all the samples and recognized as precursors of the γ-Fe 2 O 3 that form in Fe 2 O 3 -SiO 2 nanocomposites at T > 700°C. The result was achieved through a detailed comparison of structural and magnetic properties of nanocomposites with a bulk iron (III) oxide hydrated reference sample.

AB - The structure and the magnetic properties of a series of Fe 2 O 3 -SiO 2 nanocomposites (16.9 and 28.5 wt% of Fe 2 O 3 /(Fe 2 O 3 + SiO 2 )), prepared by a sol-gel method and submitted to thermal treatments in a temperature range 300-700°C, were investigated through X-ray diffraction (XRD), transmission electron microscopy (TEM), Mössbauer spectroscopy and magnetometry. Poorly crystallized particles, belonging to the 2-line ferrihydrite phase, were found in all the samples and recognized as precursors of the γ-Fe 2 O 3 that form in Fe 2 O 3 -SiO 2 nanocomposites at T > 700°C. The result was achieved through a detailed comparison of structural and magnetic properties of nanocomposites with a bulk iron (III) oxide hydrated reference sample.

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Cannas C, Concas G, Falqui A, Musinu A, Spano G, Piccaluga G. Investigation of the precursors of γ-Fe ₂ O ₃ in Fe ₂ O ₃ /SiO ₂ nanocomposites obtained through sol-gel Journal of Non-Crystalline Solids. 2001 Jun 1;286(1-2):64-73. doi: 10.1016/S0022-3093(01)00504-X

Investigation of the precursors of γ-Fe ₂ O ₃ in Fe ₂ O ₃ /SiO ₂ nanocomposites obtained through sol-gel

Abstract

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