졸겔법과 수열처리에 의한 베타 리튬알루미네이트의 막대모양 결정성장

권상운; 황성태; 박승빈

HWAHAK KONGHAK, Vol.34, No.3, 383-388, June, 1996

Export Citation

졸겔법과 수열처리에 의한 베타 리튬알루미네이트의 막대모양 결정성장

Rod-like Crystal Growth of β-LiAlO₂ by Sol-Gel Method and Hydrothermal Treatment

권상운, 황성태, 박승빈

초록

리튬 알콕사이드[(CH₃)₂CHOLi 혹은 C₂H₅CH(CH₃)OLi]와 알루미늄 알콕사이드[(CH₃)₂CHO]₃Al 혹은[C₂H₅CH(CH₃)O]₃Al)를 각각의 알콕사이드 그룹에 상응하는 알코올에서 반응시킨 뒤 졸-겔과정 및 수열처리과정을 거쳐 막대모양의 리튬알루미네이트 입자를 제조하는 방법을 제안하였으며, SEM과 XRD를 이용하여 입자의 특성을 조사하였다. 생성된 리튬알루미네이트는 β상이며, 공기 중 700℃에서 소결하여도 상변호가 없이 안정하였다. 졸-겔과정을 거치지 않거나, 가수분해시 CH₃COOH, NaOH수용액 혹은 templating agent인 tetrapropylammonium bromide를 첨가한는 경우에는 막대모양의 입자가 생성되지 않고 판형 혹은 비균질의 입자가 생성되었다.

Rod-like lithium aluminate was prepared by a sequence of sol-gel process and hydrothermal process. The starting materials were lithium alkoxide[(CH₃)₂CHOLi or C₂H₅CH(CH₃)OLi], aluminium alkoxide([(CH₃O₂CHO]₃Al or [C₂H₅CH(CH₃)O]₃Al), and the corresponding alcohol as a solvent. Lithium aluminate was in β-phase and there was no phase transformation after sintering at 700℃. But either plate-like or irregular shaped particles were obtained when sol-gel process was skipped or when CH₃COOH, NaOH solution or tetrapropylammonium bromide as a templating agent was added during the hydrolysis.

Keywords:Lithium Aluminate;Sol-gel Processing;Hydrothermal Process

[References]

Alvani C, Casadio S, Lorenzini L, Brambella G, Fusion Technol., 10, 106 (1986)
Kinoshita K, Sim JW, Ackerman JP, Mater. Res. Bull., 13, 445 (1978)
Turner CW, Clatworthy BC, Gin AHY, Adv. Ceram., 25, 141 (1989)
Hirano SI, Hayashi T, Kakeyama T, J. Am. Ceram. Soc., 70(3), 171 (1987)
Jung JM, Park SB, HWAHAK KONGHAK, 32(6), 853 (1994)
Jung JM, Park SB, J. Mater. Sci. Lett., in press (1995)
Furuta S, Katsuki H, Takagi H, J. Mater. Sci. Lett., 13(15), 1077 (1994)
Watanabe S, Takeuchi Y, Saeki G, J. Am. Ceram. Soc., 73(10), 3094 (1990)
Watanabe S, Takeuchi Y, Saeki G, J. Am. Ceram. Soc., 70(10), 268 (1987)
Watanabe S, Takeuchi Y, Saeki G, J. Ceram. Soc. Jpn., 100(12), 1421 (1992)
Komameni S, Roy R, Breval E, Ollinen M, Suma Y, Adv. Ceram. Mater., 1(1), 87 (1986)
Segal D, "Chemical Synthesis of Advanced Ceramic Materials," pp. 114-123, Cambridge Univ. Press, N.Y. (1989)
Somya S, Mater. Res. Soc. Symp. Proceed., 24, 255 (1984)
Bradley DC, "Metal Alkoxide," Academic Press, London (1978)

[Referenced By]

[1] Alvani C, Casadio S, Lorenzini L, Brambella G, Fusion Technol., 10, 106 (1986)

[2] Kinoshita K, Sim JW, Ackerman JP, Mater. Res. Bull., 13, 445 (1978)

[3] Turner CW, Clatworthy BC, Gin AHY, Adv. Ceram., 25, 141 (1989)

[4] Hirano SI, Hayashi T, Kakeyama T, J. Am. Ceram. Soc., 70(3), 171 (1987)

[5] Jung JM, Park SB, HWAHAK KONGHAK, 32(6), 853 (1994)

[6] Jung JM, Park SB, J. Mater. Sci. Lett., in press (1995)

[7] Furuta S, Katsuki H, Takagi H, J. Mater. Sci. Lett., 13(15), 1077 (1994)

[8] Watanabe S, Takeuchi Y, Saeki G, J. Am. Ceram. Soc., 73(10), 3094 (1990)

[9] Watanabe S, Takeuchi Y, Saeki G, J. Am. Ceram. Soc., 70(10), 268 (1987)

[10] Watanabe S, Takeuchi Y, Saeki G, J. Ceram. Soc. Jpn., 100(12), 1421 (1992)

[11] Komameni S, Roy R, Breval E, Ollinen M, Suma Y, Adv. Ceram. Mater., 1(1), 87 (1986)

[12] Segal D, "Chemical Synthesis of Advanced Ceramic Materials," pp. 114-123, Cambridge Univ. Press, N.Y. (1989)

[13] Somya S, Mater. Res. Soc. Symp. Proceed., 24, 255 (1984)

[14] Bradley DC, "Metal Alkoxide," Academic Press, London (1978)