Influence of Na_2O contamination on changing the cristobalite phase into amorphous in mullite ceramics with excess silica
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概要
- 論文の詳細を見る
Authors have been trying to fabricate cristobalite-containing mullite bodies with high strength and toughness by reheating mullite-glass sintered bodies. In this process, a phenomenon that once-crystallized cristobalite layer changed back to amorphous again was observed by the microstructure observation of the sample contaminated with Na_2O. In this study, the minimum amount of Na_2O to change the cristobalite phase into amorphous was quantitatively determined by the electron probe microanalysis (EPMA) method. As a result, the amount of Na_2O in the amorphous phase just near the cristobalite-amorphous phase boundary was 1.6-1.9 mass%, which almost corresponded with the minimum amount of Na_2O in the liquid phase coexisting with mullite, estimated from a phase diagram.
- 社団法人日本セラミックス協会の論文
- 2008-07-01
著者
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Sato Takashi
Faculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University
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Ohya Yutaka
Dep. Of Materials Sci. And Technol. Fac. Of Engineering Gifu Univ.
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Ohya Yutaka
Faculty Of Engineering Gifu University
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Nakagawa Zenbe-e
Faculty Of Engineering And Resource Science Akita University
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Hayashi Shigeo
Faculty Of Engineering And Resource Science Akita University
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Sato Takashi
Faculty Of Bioresource Sciences Akita Prefectural University
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Sato Takashi
Faculty Of Engineering And Resource Science Akita University
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