Characterization of nanocrystalline manganese oxide powder prepared by inert gas condensation

Chin Yi Chen; Chung Kwei Lin; Ming Hsiu Tsai; Chien Yie Tsay; Pee Yew Lee; Giin Shan Chen

doi:10.1016/j.ceramint.2007.05.013

Characterization of nanocrystalline manganese oxide powder prepared by inert gas condensation

Chin Yi Chen, Chung Kwei Lin, Ming Hsiu Tsai, Chien Yie Tsay, Pee Yew Lee, Giin Shan Chen

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

12 Citations (Scopus)

Abstract

Nanocrystalline manganese oxide powders were synthesized by an inert gas condensation technique. The manganese oxide powders, prepared from vaporized metallic manganese in a helium pressure of 10 mbar, then oxidized under the oxygen pressures of 50 and 100 mbar, exhibited a mixture of β-Mn, MnO and Mn₃O₄ phases. X-ray diffractometry (XRD) analysis identified the predominant oxide formation of the as-prepared powder to be the phase of MnO. In situ synchrotron XRD and differential scanning calorimetry (DSC) data showed that synthesized manganese powder converts from β-Mn to MnO in the temperature range of 150-250 °C and subsequently converts to Mn₃O₄ above 250 °C. Transmission electron microscopy examinations confirmed that oxidation starts from the surface of the condensed β-Mn particles. Detailed valance variations of manganese of the resulting powders were investigated by synchrotron X-ray absorption spectroscopy techniques.

Original language	English
Pages (from-to)	1661-1666
Number of pages	6
Journal	Ceramics International
Volume	34
Issue number	7
DOIs	https://doi.org/10.1016/j.ceramint.2007.05.013
Publication status	Published - Sept 2008
Externally published	Yes

Keywords

B. X-ray methods
C. Thermal properties
Gas phase reaction
In situ synchrotron X-ray diffractometry
Manganese oxide

ASJC Scopus subject areas

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.2007.05.013

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title = "Characterization of nanocrystalline manganese oxide powder prepared by inert gas condensation",

abstract = "Nanocrystalline manganese oxide powders were synthesized by an inert gas condensation technique. The manganese oxide powders, prepared from vaporized metallic manganese in a helium pressure of 10 mbar, then oxidized under the oxygen pressures of 50 and 100 mbar, exhibited a mixture of β-Mn, MnO and Mn3O4 phases. X-ray diffractometry (XRD) analysis identified the predominant oxide formation of the as-prepared powder to be the phase of MnO. In situ synchrotron XRD and differential scanning calorimetry (DSC) data showed that synthesized manganese powder converts from β-Mn to MnO in the temperature range of 150-250 °C and subsequently converts to Mn3O4 above 250 °C. Transmission electron microscopy examinations confirmed that oxidation starts from the surface of the condensed β-Mn particles. Detailed valance variations of manganese of the resulting powders were investigated by synchrotron X-ray absorption spectroscopy techniques.",

keywords = "B. X-ray methods, C. Thermal properties, Gas phase reaction, In situ synchrotron X-ray diffractometry, Manganese oxide",

author = "Chen, {Chin Yi} and Lin, {Chung Kwei} and Tsai, {Ming Hsiu} and Tsay, {Chien Yie} and Lee, {Pee Yew} and Chen, {Giin Shan}",

note = "Funding Information: The financial support of this work by the National Science Council of Republic of China under contract no. NSC94-2216-E-035-008 is gratefully acknowledged. The authors also thank the entire staff at NSRRC (Hsinchu, Taiwan, ROC) for the expert assistance. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2008",

month = sep,

doi = "10.1016/j.ceramint.2007.05.013",

language = "English",

volume = "34",

pages = "1661--1666",

journal = "Ceramics International",

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TY - JOUR

T1 - Characterization of nanocrystalline manganese oxide powder prepared by inert gas condensation

AU - Chen, Chin Yi

AU - Lin, Chung Kwei

AU - Tsai, Ming Hsiu

AU - Tsay, Chien Yie

AU - Lee, Pee Yew

AU - Chen, Giin Shan

N1 - Funding Information: The financial support of this work by the National Science Council of Republic of China under contract no. NSC94-2216-E-035-008 is gratefully acknowledged. The authors also thank the entire staff at NSRRC (Hsinchu, Taiwan, ROC) for the expert assistance. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2008/9

Y1 - 2008/9

N2 - Nanocrystalline manganese oxide powders were synthesized by an inert gas condensation technique. The manganese oxide powders, prepared from vaporized metallic manganese in a helium pressure of 10 mbar, then oxidized under the oxygen pressures of 50 and 100 mbar, exhibited a mixture of β-Mn, MnO and Mn3O4 phases. X-ray diffractometry (XRD) analysis identified the predominant oxide formation of the as-prepared powder to be the phase of MnO. In situ synchrotron XRD and differential scanning calorimetry (DSC) data showed that synthesized manganese powder converts from β-Mn to MnO in the temperature range of 150-250 °C and subsequently converts to Mn3O4 above 250 °C. Transmission electron microscopy examinations confirmed that oxidation starts from the surface of the condensed β-Mn particles. Detailed valance variations of manganese of the resulting powders were investigated by synchrotron X-ray absorption spectroscopy techniques.

AB - Nanocrystalline manganese oxide powders were synthesized by an inert gas condensation technique. The manganese oxide powders, prepared from vaporized metallic manganese in a helium pressure of 10 mbar, then oxidized under the oxygen pressures of 50 and 100 mbar, exhibited a mixture of β-Mn, MnO and Mn3O4 phases. X-ray diffractometry (XRD) analysis identified the predominant oxide formation of the as-prepared powder to be the phase of MnO. In situ synchrotron XRD and differential scanning calorimetry (DSC) data showed that synthesized manganese powder converts from β-Mn to MnO in the temperature range of 150-250 °C and subsequently converts to Mn3O4 above 250 °C. Transmission electron microscopy examinations confirmed that oxidation starts from the surface of the condensed β-Mn particles. Detailed valance variations of manganese of the resulting powders were investigated by synchrotron X-ray absorption spectroscopy techniques.

KW - B. X-ray methods

KW - C. Thermal properties

KW - Gas phase reaction

KW - In situ synchrotron X-ray diffractometry

KW - Manganese oxide

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SN - 0272-8842

VL - 34

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EP - 1666

JO - Ceramics International

JF - Ceramics International

IS - 7

ER -

Characterization of nanocrystalline manganese oxide powder prepared by inert gas condensation

Abstract

Keywords

ASJC Scopus subject areas

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