Thermal Stability of Sodium Aluminum Silicates with and without Alkali Carbonates
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- TSUMURA Naoki
- Department of Materials Science and Engineering, Faculty of Engineering, Ehime University
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- KURAMOTO Ayuko
- Department of Materials Science and Engineering, Faculty of Engineering, Ehime University
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- SHIMAMOTO Youichi
- Department of Materials Science and Engineering, Faculty of Engineering, Ehime University
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- AONO Hiromichi
- Department of Materials Science and Engineering, Faculty of Engineering, Ehime University
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- SADAOKA Yoshihiko
- Department of Materials Science and Engineering, Faculty of Engineering, Ehime University
Bibliographic Information
- Other Title
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- ナトリウムアルミニウムケイ酸塩-アルカリ炭酸塩混合系における熱的安定性
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Abstract
The thermal stability of solium aluminium silicates and their reactivity to alkali carbonates were investigated in view of their application as CO2 gas sensors. A nepheline phase was very stable, since the peak position of the X-ray diffraction pattern was hardly influenced by either heat treatment or humidification up to 800°C. A distorted carnegieite phase (like-carnegieite) transformed into the nepheline phase at 500°C under a humid condition, while under a dry condition, it was stable up to 800°C but transformed into the nepheline phase at 900°C. For mixtures with alkali carbonates, the nepheline phase was most stable even under the humid condition at temperatures below 500°C. When the mixtures were heated at 600°C, the nepheline phase reverted to the like-carnegieite phase and alkali silicates, such as Na2SiO3, Li2SiO3 and Li4SiO4, formed as by-products. For Na2O-Al2O3-4SiO2 sintering mixtures with Li2CO3, the like-carnegieite phase transformed into the nepheline phase at 500°C. The nepheline phase was stable up to 1000°C even under the humid condition and Li2SiO3 formed as a by-product.<br>
Journal
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 113 (1316), 269-274, 2005
The Ceramic Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001205248660352
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- NII Article ID
- 110002292293
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- NII Book ID
- AN10040326
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- ISSN
- 18821022
- 09145400
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- NDL BIB ID
- 7301196
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed