書誌事項
- タイトル別名
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- Thermal and Mechanical Properties of Unidirectionally Solidified Li<sub>2</sub>O⋅2SiO<sub>2</sub> Ceramics
- ユウエキ ノ 1ホウコウ ギョウコ ニ ヨリ エラレル Li2O 2SiO2
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Melts of the compositions, Li2O⋅2SiO2 and 100 (Li2O⋅2SiO2)⋅3RxOy, where RxOy is B2O3, Na2O, MgO, Al2O3, SiO2 or P2O5, were unidirectionally solidified by the thermal gradient furnace method (Ref. Yogyo-Kyokai-Shi, 85, 501 (1977)). The solidified ingots were composed mainly of columnar Li2O⋅2SiO2 crystals of 170-580μm in diameter, elongating parallel to their c-axes. Thermal expansions of the ingots in the direction of their crystal elongation (//) agreed with that of the c-axis of a Li2O⋅2SiO2 single crystal, irrespective of their solidification rates and compositions. Their expansions in the direction perpendicular to their crystal elongation (⊥), however, markedly differed from the mean value of a- and b-axes of the Li2O⋅2SiO2 single crystal, being dependent on their solidification rates and compositions. Propagation rates of a 12MHz longitudinal sound wave in the ingots along the direction (//) showed a constant value of 7.2km/s, irrespective of their porosity, whereas those along the direction (⊥) decreased markedly with increasing porosity. The compressive strengths (s) of the ingots in the direction (//) little decreased with increasing porosity (p), whereas those in the direction (⊥) decreased markedly on the equation s∝exp (-25p). These anisotropic properties of the ingots were interpreted in terms of their microstructure; i.e. of the continuity of the Li2O⋅2SiO2 columnar crystals, and the presence of the other crystals, glassy phase and pores among the columnar crystals.
収録刊行物
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- 窯業協會誌
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窯業協會誌 87 (1004), 182-188, 1979
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680191746944
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- NII論文ID
- 110002310235
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- NII書誌ID
- AN00245650
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- ISSN
- 18842127
- 00090255
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- NDL書誌ID
- 2050609
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可