| Project/Area Number |
10555271
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
反応・分離工学
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
SUGIMOTO Tadao Institute for Advanced Materials Processing, Tohoku University, Professor, 素材工学研究所, 教授 (80235895)
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| Co-Investigator(Kenkyū-buntansha) |
ITOH Hiroyuki Institute for Advanced Materials Processing, Tohoku University, Research Associate, 素材工学研究所, 助手 (00213083)
MURAMATSU Atsushi Institute for Advanced Materials Processing, Tohoku University, Associate Professor, 素材工学研究所, 助教授 (40210059)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥10,100,000 (Direct Cost: ¥10,100,000)
Fiscal Year 1999: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1998: ¥7,800,000 (Direct Cost: ¥7,800,000)
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| Keywords | Monodispersed particles / Structure control / Ceramics / Colloidal particles / Condensed system / Sintered materials / Titania / Zirconia / 粒径制御 / 単分散粒子 / 製造プロセス / 生成機構 / 濃厚系 / ゲル |
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| Research Abstract |
1. First, we started the study on the precise control of monodispersed particles of crystalline TiOィイD22ィエD2 in size and shape. Monodispersed TiOィイD22ィエD2 particles were formed by aging the solution of titanium isopropoxide and triethanolamine in the presence of ammonia. The role of triethanolamine and ammonia is to stabilize titanium complex in order to control the reaction step of the hydrolysis of titanium and the shape-controller of TiOィイD22ィエD2 particles, respectively. In the process of the formation of TiOィイD22ィエD2, titanium hydroxide gel was formed as a precursor solid. The gel network protected growing TiOィイD22ィエD2 particles not to be aggregated each other by Brownian motion. The present study was focused on the precise control of size and shape of TiOィイD22ィエD2 through the detailed investigation on the stability of the hydroxide gel.
2. Based on the idea for the synthesis of TiOィイD22ィエD2 particles as mentioned above, the same procedure was extended to the production of the other monodispersed particles. The effect of the starting materials. pH, concentrations, and temperature on the reaction process was investigated for the formation of the monodispersed particles of zirconia, barium titanate, and alumina.
3. The study on the application of monodispersed zirconia particles synthesized in condensed system was carried out in order to obtain the excellent sintered materials of zirconia.
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