Solid State Reaction between Nb<sub>2</sub>O<sub>5</sub> and the Compounds in the System Al<sub>2</sub>O<sub>3</sub>-Y<sub>2</sub>O<sub>3</sub>
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- HOTTA Noriyasu
- Department of Chemical Engineering, Faculty of Engineering, Niigata University
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- SAITO Natsukaze
- Department of Chemical Engineering, Faculty of Engineering, Niigata University
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- MATSUO Shigetomo
- Department of Chemical Engineering, Faculty of Engineering, Niigata University
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- MATSUSHITA Toru
- Department of Applied Chemistry, Faculty of Engineering, Hokkaido University
Bibliographic Information
- Other Title
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- Nb2O5とAl2O3‐Y2O3系化合物の固相反応
- Nb2O5 ト Al2O3 Y2O3ケイ カゴウブツ ノ コソウ ハンノウ
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Description
Solid state reactions between sintered Nb2O5 and three kinds of Al2O3-Y2O3 compounds (5Al2O3⋅3Y2O3, Al2O3⋅Y2O3, Al2O3⋅2Y2O3) have been studied at the temperature range from 1250°C to 1325°C in air. The reaction product formed at the interface were examined by using EPMA and X-ray diffraction. The following results were obtained:<br>Al2O3⋅Nb2O5 and Y2O3⋅Nb2O5 were formed by the one-way diffusion of Nb2O5 into the compounds in the system Al2O3-Y2O3. The ellipsoidal particles of Al2O3⋅Nb2O5 and the spherical particles of Y2O3⋅Nb2O5 were unevenly distributed with the aggregation state in the reaction layers. The observed separation of reaction couples was probably due to the difference of thermal expansion coefficients between the reaction products and Nb2O5. The reaction rate “x” followed the parabolic law “x2=2DNbt”, and the apparent activation energy was 90-95kcal/mol.
Journal
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- Journal of the Ceramic Association, Japan
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Journal of the Ceramic Association, Japan 90 (1047), 653-658, 1982
The Ceramic Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282680194433536
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- NII Article ID
- 110002312377
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- NII Book ID
- AN00245650
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- ISSN
- 18842127
- 00090255
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- HANDLE
- 10191/7486
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- NDL BIB ID
- 2470814
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed