YBaCuO계 초전도체 합성 및 특성에 미치는 분쇄효과

류호진

Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.5, 811-815, October, 1997

Export Citation

YBaCuO계 초전도체 합성 및 특성에 미치는 분쇄효과

Effect of Grinding on Preparation of YBaCuO-System and its Superconductivity

류호진

초록

본 연구에서는 고상반응에 의한 YBa₂Cu₃O_7-y계 고온 초전도체의 결정구조 및 초전도 특성에 미치는 원료분말의 분쇄효과를 명백히 할 목적으로 Y₂O₃, BaCO₃, CuO의 혼합물을 유성볼밀을 사용하여 건식혼합분쇄를 행하였다. 얻어진 분쇄산물의 비표면적은 60분 분쇄할 때까지 증가하며. 그 후 분쇄시간이 증가함에 따라 감소하는 경향을 보였다. 소결체의 임계온도는 분쇄시간에 의존하지 않고, 약 90K로 일정한 값을 나타내었다. 한편, 소결체의 임계전류밀도는 분쇄시간에 크게 의존하였으며, 60분 분쇄한 소결체에서 최대치 150A/cm²를 나타내었다.

The present work describes the effect of dry grinding of a mixture composed of Y₂O₃, BaCO₃ and CuO powders with a planetary ball mill before heat treatment on crystal structure and superconductivity in the YBa₂Cu₃O_7-y. The specific surface area of the ground product of mixture decreased with an increase in the grinding time, after showing an upward trend up to 60 minutes of grinding. The critical current density, which was influenced by the grinding time of mixture, indicates the maximum value of about 150 A/cm² in the case of 60 minutes grinding, while the critical temperature, which were around 90K, for the sintered bodies were almost independent of the grinding time.

[References]

Wu MK, Ashburn JR, Tong CJ, Hor PH, Meng RL, Gao L, Huang ZJ, Wang YQ, Chu CW, Phys. Rev. Lett., 58, 908 (1987)
Rha JJ, Yoon KJ, Kang SJ, Yoon DN, J. Am. Ceram. Soc., 71, C328 (1988)
Clarke AP, Schwarz RB, Thompson JD, J. Less. Com. Metals, 168, 1 (1991)
Ryu HJ, Kasai E, Saito F, MMIJ, 108, 221 (1992)
Lin IJ, Somasundaran P, Powder Technol., 6, 171 (1972)
Jiang XP, Zhang JS, Huang JG, Jiang M, Qiao GW, Hu ZQ, Shi X, Mater. Lett., 7, 250 (1988)
Kao M, Mater. Lett., 6, 53 (1987)
Yamada Y, Murasaki S, Suganuma M, Mizutani U, Jpn. J. Appl. Phys., 27, L802 (1988)
Yokoyama T, Yoshida Y, Kondo A, Naito M, Yoshikawa M, Kamiya H, Jimbo G, Powder Technol. Metal., 28, 501 (1991)
Beyers R, Lim G, Engler EM, Lee VY, Ramire ML, Savoy RJ, Tsuei CC, Park SI, Shafer MW, Gallagher W, Appl. Phys. Lett., 51, 614 (1987)

[1] Wu MK, Ashburn JR, Tong CJ, Hor PH, Meng RL, Gao L, Huang ZJ, Wang YQ, Chu CW, Phys. Rev. Lett., 58, 908 (1987)

[2] Rha JJ, Yoon KJ, Kang SJ, Yoon DN, J. Am. Ceram. Soc., 71, C328 (1988)

[3] Clarke AP, Schwarz RB, Thompson JD, J. Less. Com. Metals, 168, 1 (1991)

[4] Ryu HJ, Kasai E, Saito F, MMIJ, 108, 221 (1992)

[5] Lin IJ, Somasundaran P, Powder Technol., 6, 171 (1972)

[6] Jiang XP, Zhang JS, Huang JG, Jiang M, Qiao GW, Hu ZQ, Shi X, Mater. Lett., 7, 250 (1988)

[7] Kao M, Mater. Lett., 6, 53 (1987)

[8] Yamada Y, Murasaki S, Suganuma M, Mizutani U, Jpn. J. Appl. Phys., 27, L802 (1988)

[9] Yokoyama T, Yoshida Y, Kondo A, Naito M, Yoshikawa M, Kamiya H, Jimbo G, Powder Technol. Metal., 28, 501 (1991)

[10] Beyers R, Lim G, Engler EM, Lee VY, Ramire ML, Savoy RJ, Tsuei CC, Park SI, Shafer MW, Gallagher W, Appl. Phys. Lett., 51, 614 (1987)