Effects of Preparation Conditions on Pore Structure and Crystal Phase of Mesoporous Zirconia.
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- TAKENAKA Shoichi
- Department of Materials Technology, Faculty of Engineering, Chiba University
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- TAKAHASHI Ryoji
- Department of Materials Technology, Faculty of Engineering, Chiba University
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- SATO Satoshi
- Department of Materials Technology, Faculty of Engineering, Chiba University
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- SODESAWA Toshiaki
- Department of Materials Technology, Faculty of Engineering, Chiba University
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- UEMATSU Takayoshi
- Department of Materials Technology, Faculty of Engineering, Chiba University
Bibliographic Information
- Other Title
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- 調製条件がジルコニア多孔体の細孔構造と結晶相に与える影響
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Abstract
Mesoporous zirconia was prepared by the hydrolysis of zirconium tetrapropoxide (ZTP). Crystal structure of zirconia was controlled by using different hydrolysis procedures. A large amount of water and subsequent calcination led to the formation of mesoporous monoclinic zirconia with the pore size of 20 nm, while non-porous tetragonal zirconia was prepared with a small amount of water. Mesoporous tetragonal zirconia with controlled pore size was prepared from ZTP and carboxylic acids with different alkyl-chain length. The average pore size of the tetragonal zirconia increased from 4.8 to 7.5 nm with increasing alkyl-chain length of carboxylic acids. A complex of ZTP and carboxylic acid formed a hexagonal mesophase at the molar ratio of carboxylic acid to ZTP≥1.5. The lattice parameter of the hexagonal mesophase increased with increasing alkyl-chain length of carboxylic acid. The hexagonal mesophase, however, disappeared when the precursor melted over 58°C. The calcined zirconia consisted of the aggregates of crystallites, and the mesopores were located at interparticles. The appropriate coordination state and alkyl-chain length of carboxylic acid are probably effective in preparing mesoporous tetragonal zirconia and controlling the mesopores.
Journal
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 111 (1289), 16-23, 2003
The Ceramic Society of Japan
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Details 詳細情報について
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- CRID
- 1390001205249929216
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- NII Article ID
- 110002292435
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- NII Book ID
- AN10040326
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- ISSN
- 18821022
- 09145400
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- NDL BIB ID
- 6426444
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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