Effects of mechanical treatment on phase transformation and sintering of nano-sized γ-Fe2O3 powder

Hsing I. Hsiang; Fu Su Yen

doi:10.1016/S0272-8842(02)00078-0

Effects of mechanical treatment on phase transformation and sintering of nano-sized γ-Fe₂O₃ powder

Hsing I. Hsiang, Fu Su Yen

Department of Resources Engineering

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

31 Citations (Scopus)

Abstract

The effects of mechanical treatment on the phase transformation and sintering of nano-sized γ-Fe₂O₃ powder were studied. γ-Fe₂O₃ powder was obtained by calcining iron tartrates at 300 °C. The mechanical treatment increased the contact areas in the γ-Fe₂O₃ powder, which acted as nucleation sites for the γ→α-Fe₂O₃ phase transformation, and resulted in lowering the transformation temperature. The greater surface area and fine equiaxed particle of the milled powder thus obtained were due to the vermicular microstructure development being inhibited. Consequently, the samples with mechanical treatment after sintering developed a uniform fine-grained microstructure.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Ceramics International
Volume	29
Issue number	1
DOIs	https://doi.org/10.1016/S0272-8842(02)00078-0
Publication status	Published - 2003

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/S0272-8842(02)00078-0

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title = "Effects of mechanical treatment on phase transformation and sintering of nano-sized γ-Fe2O3 powder",

abstract = "The effects of mechanical treatment on the phase transformation and sintering of nano-sized γ-Fe2O3 powder were studied. γ-Fe2O3 powder was obtained by calcining iron tartrates at 300 °C. The mechanical treatment increased the contact areas in the γ-Fe2O3 powder, which acted as nucleation sites for the γ→α-Fe2O3 phase transformation, and resulted in lowering the transformation temperature. The greater surface area and fine equiaxed particle of the milled powder thus obtained were due to the vermicular microstructure development being inhibited. Consequently, the samples with mechanical treatment after sintering developed a uniform fine-grained microstructure.",

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AB - The effects of mechanical treatment on the phase transformation and sintering of nano-sized γ-Fe2O3 powder were studied. γ-Fe2O3 powder was obtained by calcining iron tartrates at 300 °C. The mechanical treatment increased the contact areas in the γ-Fe2O3 powder, which acted as nucleation sites for the γ→α-Fe2O3 phase transformation, and resulted in lowering the transformation temperature. The greater surface area and fine equiaxed particle of the milled powder thus obtained were due to the vermicular microstructure development being inhibited. Consequently, the samples with mechanical treatment after sintering developed a uniform fine-grained microstructure.

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Effects of mechanical treatment on phase transformation and sintering of nano-sized γ-Fe₂O₃ powder

Abstract

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