기계적 합금화법으로 제조된 고온 수전해용 Ni/YSZ 전극의 미세구조 특성

박근만; 채의석; 홍현선; 추수태; Keun-Man Park; Ui-Seok Chae; Hyun Seon Hong; Soo-Tae Choo

Korean Journal of Materials Research, Vol.14, No.10, 743-748, October, 2004

DOI10.3740/MRSK.2004.14.10.743 Export Citation

기계적 합금화법으로 제조된 고온 수전해용 Ni/YSZ 전극의 미세구조 특성

Microstructural Characteristics of Ni/YSZ Cermet for High Temperature Electrolysis by Mechanical Alloying

박근만, 채의석, 홍현선, 추수태^†

고등기술연구원 플랜트엔지니어링센터

Keun-Man Park, Ui-Seok Chae, Hyun Seon Hong, and Soo-Tae Choo^†

Plant Engineering Center, Institute of Advanced Engineering (IAE), Korea

E-mail:

Modified Ni/YSZ cermets for high temperature electrolysis were synthesized by the direct ball milling of Ni and YSZ powder. The ball milling was carried out in dry process and in ethanol with varying milling time. While the dry-milling decreased the average size from 65 to 80μm , the wet-milling decreased the average size down to 10μm . In addition, very fine particles less than 0.1μm were observed in the wet-milling condition. The subsequent process of cold-pressing and sintering at 900 ? C for 2 h did not affect the particle size of dry-milled powder. The electrical conductivity of the dry-milled Ni/YSZ cermet showed the value of 5×10 2 S/cm and this value was increased to 1.4×10 4 S/cm after the sintering at 900 ? C for 2 h.

Keywords:Ni/YSZ;cermet;mechanical alloying;electrical conductivity;high temperature electrolysis

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[2] Donitz W, Erdle E, Int. J. Hydrogen Energy, 10, 801 (1985)

[3] Donitz W, Dietrich G, Erdle E, Streicher R, Int. J. Hydrogen Energy, 13, 283 (1988)

[4] Hong HS, Choo ST, Yun Y, Trans. of the Korea Hydrogen Energy Society, 14(4), 335 (2003)

[5] Donitz W, Erdle E, Streicher R, Electrochemical Hydrogen Technology, Amsterdam, Elsevier (1990) (1990)

[6] Salzano FJ, Skaperdas G, Mezzina A, Int. J. Hydrogen Energy, 10, 801 (1985)

[7] Fukui T, Ohara S, Naito M, Nogi K, Powder Technol., 132(1), 52 (2003)

[8] Moon H, Lee HW, Lee JH, Yoon KH, J. Kor. Ceram. Soc., 37(12), 1140 (2000)

[9] Pound BG, Bevan DJM, Bockris JOM, Int. J. Hydrogen Energy, 6, 473 (1981)

[10] Arashi H, Naito H, Miura H, Int. J. Hydrogen Energy, 16, 603 (1991)

[11] Vance AL, 2003 Hydrogen & Fuel Cells Merit Review Meeting, Berkeley, CA, May 20 (2003) (2003)

[12] Barbi GB, Mari CM, Solid State Ionics, 6, 341 (1982)

[13] Dutta S, Block DL, Port RL, Int. J. Hydrogen Energy, 15, 387 (1990)

[14] Herring JS, O'Brien JE, Stoots CM, Lessing PA, in Proceedings of ICAPP '04 (Pittsburgh, PA, USA, June, 2004), Paper 4322, p. 1-10 (2004)

[15] Benjamin JS, Volin TE, Metall. Trans., 5, 1930 (1974)

[16] Gilman PS, Benjamin JS, Ann. Rev. Mater. Sci., 13, 279 (1983)

[17] Lu L, Lai MO, Mechanical Alloying, Kluwer Academic Publishers, Dordrecht, The Netherlands (1998) (1998)

[18] Koide H, Someya Y, Yoshida T, Maruyama T, Solid State Ion., 132(3-4), 253 (2000)

[19] Zhu WZ, Deevi SC, Mater. Sci. Eng. A, 362, 228 (2003)

[20] Lee JH, Moon H, Lee HW, Kim J, Kim JD, Yoon KH, Solid State Ion., 148(1-2), 15 (2002)