Formation Region of Cryptomelane with Different K-Ion Occupancy and Elutriation of K-Ion with Water
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- OHSATO Hitoshi
- Department of Materials Science and Engineering, Nagoya Institute of Technology
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- SUGIMURA Takashi
- Department of Materials Science and Engineering, Nagoya Institute of Technology
Bibliographic Information
- Other Title
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- cryptomelaneの生成領域とカリウムの溶出
- cryptomelane ノ セイセイ リョウイキ ト カリウム ノ ヨウシュ
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Abstract
Cryptomelanes [Kx(Mn3+, Mn4+)8O16(1.1≤x≤2.0)] with different occupancies (55% to 100%) of K-ion in the one-dimensional tunnels were synthesized by solid state reaction. The critical formation temperatures of cryptomelanes with low occupancy are lower than those with high occupancy. Cryptomelanes with low occupancy change to those with high occupancy accompanied with bixbyite (Mn2O3) during the heating. The deformation temperature measured by DTA is a function of the K-ion occupancy. A certain amount of K-ions of cryptomelane is elutriated quickly from the tunnels by water. The K-ion occupancy can be determined from the functional relationship between the deformation temperature and the K-ion occupancy, based on the deformation temperature measured by DTA.
Journal
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 101 (1170), 195-198, 1993
The Ceramic Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282680253814656
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- NII Article ID
- 110002287933
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- NII Book ID
- AN10040326
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- ISSN
- 18821022
- 09145400
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- NDL BIB ID
- 3810468
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed