PreParation and Dielectric Properties of Ferroelectric Barium Titanate Fine Particles by Hydrothermal Method

Myeong-Heon Um; Chul-Tae Lee; Hidehiro Kumazawa

Journal of Industrial and Engineering Chemistry, Vol.3, No.4, 251-256, December, 1997

Myeong-Heon Um, Chul-Tae Lee¹, and Hidehiro Kumazawa²

Dept. of Industrial Chemistry, Cheonan Nat'l Tech. College, 275-1, Korea
¹Dept. of Chemical Engineering, DanKook Univ., Seoul 140-714, Korea
²Dept. of Chemical and Biochemical Engineering, Toyama Univ., Toyama 930, Japan

BaTiO₃ fine particles with perovskite structure were synthesized using amorphous TiO₂ at temperatures as low as 300℃ by hydrothermal method. Barium hydroxide and titanium tetraethoxide were used as starting materials. The relationship between the specific dielectric constant of sintered disks and the mean size of synthesized particles has been investigated. The mean size of the BaTiO₃ particles synthesized by hydrothermal reaction for 4 hours was nearly 0.047㎛ while the barium-to-titanium (BT) molar ratio≥ 1.2. The specific dielectric constants of sintered BaTiO₃ disks exceeded 6000 with the particle size of 0.10-0.17㎛. It was speculated that the particle size of resulting disks would considerably affect the specific dielectric constant of resulting disks.

[References]

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[Referenced By]

[Related Articles]

[1] Sheppard LM, Ceram. Bull., 71, 85 (1992)

[2] Clabaugh WS, Swiggard EM, Gilchrist R, J. Res. Natl. Bur. Stant., 56, 289 (1956)

[3] Limar TF, SavosKina AI, Kisel NG, Izv. Akad. NaukSSSR. Neorg. Mater., 12, 1134 (1976)

[4] Kirby KW, Mater. Res. Bull., 23, 881 (1988)

[5] Okamura H, Bowon HK, Ceram. Int., 12, 161 (1986)

[6] Tahan DM, Safari A, Klein LC, J. Am. Ceram. Soc., 79(6), 1593 (1996)

[7] Shaikh AS, Vest GM, J. Am. Ceram. Soc., 69, 682 (1986)

[8] Kajiyoshi K, Ishizawa N, Yoshimura M, J. Am. Ceram. Soc., 74, 369 (1991)

[9] Kumazawa H, Annen S, Sada E, J. Mater. Sci., 30(18), 4740 (1995)

[10] Dawson WJ, Ceram. Bull., 68, 1673 (1988)

[11] Yitai Q, J. Mater. Chem., 3, 203 (1993)

[12] Kumazawa H, Kagimoto T, Kawabata A, J. Mater. Sci., 31(10), 2599 (1996)

[13] Kumazawa H, Um MH, "The 2nd Korea-Japan Symposium on Advanced Materials," 76 (1996)

[14] Vivekanandan R, Philip S, Kutty TRN, Mater. Res. Bull., 22, 99 (1986)

[15] Hennings D, Schreinemacher S, J. Eur. Ceram. Soc., 9, 41 (1992)

[16] Nakanishi K, Solomon PH, Furutachi N, "Infrared Absorption Spectroscopy," Nankodo, Tokyo 29 (1978)

[17] Wada S, Suzuki T, Noma T, J. Jpn. Ceram. Soc., 103(12), 1220 (1995)

[18] Slater JC, Phys. Rev., 78, 748 (1950)

[19] Spitzer WG, Miller RC, Kleinman DA, Howarth LE, Phys. Rev., 126, 1710 (1962)