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

研究成果: 雜誌貢獻 › 文章 › 同行評審

13 引文斯高帕斯（Scopus）

摘要

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.

原文	英語
頁（從 - 到）	1661-1666
頁數	6
期刊	Ceramics International
卷	34
發行號	7
DOIs	https://doi.org/10.1016/j.ceramint.2007.05.013
出版狀態	已發佈 - 9月 2008
對外發佈	是

ASJC Scopus subject areas

電子、光磁材料
陶瓷和複合材料
製程化學與技術
表面、塗料和薄膜
材料化學

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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.",

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

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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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Characterization of nanocrystalline manganese oxide powder prepared by inert gas condensation

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