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논문 기본 정보

자료유형
학술저널
저자정보
Nakagawa, Nakagawa, Z. (Research Laboratory of Engineering Materials, Tokyo Institute of Technology) Enomoto, Enomoto, N. (Research Laboratory of Engineering Materials, Tokyo Institute of Technology) Nomura, Nomura, S. (Research Laboratory of Engineering Materials, Tokyo Institute of Technology) Kim, Kim, D.W. (Research Laboratory of Engineering Materials, Tokyo Institute of Technology) Lim, Lim, D.Y. (Department of Inorganic Materials Engineering, Paichai University)
저널정보
한국재료학회 Fabrication and Characterization of Advanced Materials Fabrication and Characterization of Advanced Materials 제2권 제4호
발행연도
1995.1
수록면
585 - 590 (6page)

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초록· 키워드

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Al-isopropoxide dispersed into isopropanol was heated in an autoclave above the critical point of propanol(23$5^{\circ}C$, 4.7MPa). Propanol coexisting Al-isopropoxide produced some water during the condensation reaction to isopropul ether, while only propanol did not change under that conditions. This water hydrolyzed Al-isopropoxide to form an alumina at 30$5^{\circ}C$ and 11.0MPa. This alumina had a similar X-ray diffraction pattern of $\chi$-alumina. The heating treatment showed the aluminal transformed directly to ${\alpha}$-alumina around 110$0^{\circ}C$, not to pass via any other intermediate aluminas. The aluminal was named pseudo $\chi$-alumina as a new phase. As-prepared alumina was fine powder of about 20nm, and had about 5% weight loss in the temperature range from 30$0^{\circ}C$ to 65$0^{\circ}C$, and the IR spectral showed no constitutional water.

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