Controlled synthesis of hexagonal α-Fe2O3 crystals for ceramic colors by hydrothermal reaction of FeCl3 and NaOH solutions

Hiroaki Katsuki; Eun Kyoung Choi; Won Jun Lee; Woo Seok Cho; Kwang Taek Hwang; Wenyan Huang; Sridhar Komarneni

doi:10.1016/j.ceramint.2017.07.139

Controlled synthesis of hexagonal α-Fe₂O₃ crystals for ceramic colors by hydrothermal reaction of FeCl₃ and NaOH solutions

Hiroaki Katsuki, Eun Kyoung Choi, Won Jun Lee, Woo Seok Cho, Kwang Taek Hwang, Wenyan Huang, Sridhar Komarneni

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

11 Scopus citations

Abstract

The effect of mixing process of FeCl₃ and NaOH solution on the formation of platy (hexagonal) α-Fe₂O₃ was investigated at 160 and 180 °C by the hydrothermal process. The crystal growth of platy α-Fe₂O₃ was promoted at higher hydrothermal temperature, higher concentration of NaOH solution and by the addition of FeCl₃ solution to NaOH solution instead of the reverse addition. Platy crystals of α-Fe₂O₃ showed dark red wine color while nanophase equiaxed crystals showed yellowish red color. The platy crystals of 3–6 µm in average diameter kept their platy structure after heating at 900 and 1100 °C in air due to their higher thermal stability towards sintering.

Original language	English (US)
Pages (from-to)	14050-14056
Number of pages	7
Journal	Ceramics International
Volume	43
Issue number	16
DOIs	https://doi.org/10.1016/j.ceramint.2017.07.139
State	Published - Nov 2017

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/j.ceramint.2017.07.139

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title = "Controlled synthesis of hexagonal α-Fe2O3 crystals for ceramic colors by hydrothermal reaction of FeCl3 and NaOH solutions",

abstract = "The effect of mixing process of FeCl3 and NaOH solution on the formation of platy (hexagonal) α-Fe2O3 was investigated at 160 and 180 °C by the hydrothermal process. The crystal growth of platy α-Fe2O3 was promoted at higher hydrothermal temperature, higher concentration of NaOH solution and by the addition of FeCl3 solution to NaOH solution instead of the reverse addition. Platy crystals of α-Fe2O3 showed dark red wine color while nanophase equiaxed crystals showed yellowish red color. The platy crystals of 3–6 µm in average diameter kept their platy structure after heating at 900 and 1100 °C in air due to their higher thermal stability towards sintering.",

author = "Hiroaki Katsuki and Choi, {Eun Kyoung} and Lee, {Won Jun} and Cho, {Woo Seok} and Hwang, {Kwang Taek} and Wenyan Huang and Sridhar Komarneni",

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T1 - Controlled synthesis of hexagonal α-Fe2O3 crystals for ceramic colors by hydrothermal reaction of FeCl3 and NaOH solutions

AU - Katsuki, Hiroaki

AU - Choi, Eun Kyoung

AU - Lee, Won Jun

AU - Cho, Woo Seok

AU - Hwang, Kwang Taek

AU - Huang, Wenyan

AU - Komarneni, Sridhar

PY - 2017/11

Y1 - 2017/11

N2 - The effect of mixing process of FeCl3 and NaOH solution on the formation of platy (hexagonal) α-Fe2O3 was investigated at 160 and 180 °C by the hydrothermal process. The crystal growth of platy α-Fe2O3 was promoted at higher hydrothermal temperature, higher concentration of NaOH solution and by the addition of FeCl3 solution to NaOH solution instead of the reverse addition. Platy crystals of α-Fe2O3 showed dark red wine color while nanophase equiaxed crystals showed yellowish red color. The platy crystals of 3–6 µm in average diameter kept their platy structure after heating at 900 and 1100 °C in air due to their higher thermal stability towards sintering.

AB - The effect of mixing process of FeCl3 and NaOH solution on the formation of platy (hexagonal) α-Fe2O3 was investigated at 160 and 180 °C by the hydrothermal process. The crystal growth of platy α-Fe2O3 was promoted at higher hydrothermal temperature, higher concentration of NaOH solution and by the addition of FeCl3 solution to NaOH solution instead of the reverse addition. Platy crystals of α-Fe2O3 showed dark red wine color while nanophase equiaxed crystals showed yellowish red color. The platy crystals of 3–6 µm in average diameter kept their platy structure after heating at 900 and 1100 °C in air due to their higher thermal stability towards sintering.

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JF - Ceramics International

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Controlled synthesis of hexagonal α-Fe₂O₃ crystals for ceramic colors by hydrothermal reaction of FeCl₃ and NaOH solutions

Abstract

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