발화합성법으로 제조한 YBa2Cu3-yAgyO7-x의 초전도 특성

김영순; 양석우; 박정식; 신형식

Journal of the Korean Industrial and Engineering Chemistry, Vol.7, No.4, 639-644, August, 1996

Export Citation

발화합성법으로 제조한 YBa₂Cu_3-yAg_yO_7-x의 초전도 특성

Superconductivity of YBa₂Cu_3-yAg_yO_7-x Manufactured by Pyrophoric Synthetic Method

김영순, 양석우, 박정식, 신형식

초록

원료물질인 Y₂O₃, BaCO₃, CuO 및 AgNO₃ 분말로부터 Y계 고온초전도체를 발화합성법으로 제조하였다 YBa₂Cu₃O_7-x와 Cu를 Ag로 부분 치환한 YBa₂Cu_3-yAg_yO_7-x의 특성을 X-ray diffractometer, resistivity measuring equipment, SEM, and Vickers Hardness 등으로 분석하였다. YBa₂Cu₃O_7-x의 Tc,zero는 91K였고, 밀도는 5.2g/㎤, 경도는 590kg/㎟였다. Cu를 Ag로 0.15몰 이하 부분 치환한 YBa₂Cu_3-yAg_yO_7-x의 경우 임계온도(Tc)는 거의 변하지 않으면서 미세구조, 밀도 및 경도가 향상되었다.

The YBa₂Cu_3-yAg_yO_7-x high-temperature superconductors were prepared by pyrophoric synthetic method from Y₂O₃, BaCO₃, CuO, and AgNO₃ powders. When we were partially substituted Ag for Cu in YBa₃Cu₃O_7-x, the superconducting properties of YBa₂Cu_3-yAg_yO_7-xwere investigated with X-ray diffractometer, resisitivity measuring equipment, SEM, and Vickers Hardness. The Tc,zero of YBa₂Cu₃O_7-x was 91K, the density was 5.2g/㎤, and the hardness was 590kg/㎟. When Ag was substituted below y= 0.15, electrical property of YBa₂Cu_3-yAg_yO_7-x did not change but microstructure, density, and hardness were enhanced.

[References]

Chu CW, Hor PH, Meng RL, Gao L, Huang ZJ, Wang YQ, Phys. Rev. Lett., 58, 405 (1987)
Maeda H, Tanaka Y, Fukutomi M, Asano T, Jpn. J. Appl. Phys., 27, L209 (1988)
Sheng ZZ, Hermann AM, Ali AE, Almasan C, Estrada J, Datta T, Matson RJ, Phys. Rev. Lett., 60, 937 (1988)
Eibsch M, Lines ME, Tarascon ZM, Barboux P, Phys. Rev., B, Condens. Matter, 38, 2896 (1988)
Muromachi ET, Uchida Y, Kato K, Jpn. J. Appl. Phys., 26, 2087 (1987)
Eibschiitz M, Lines ME, Reiff WM, vanDover B, Waszczak JV, Zahurak S, Felder RJ, Appl. Phys. Lett., 62, 1827 (1993)
Xiao G, Streitz FH, Gavrin A, Du YW, Chien CL, Phys. Rev., B, Condens. Matter, 35, 8782 (1987)
Muromachi ET, Uchida Y, Kato K, Jpn. J. Appl. Phys., 26, 2087 (1987)
Bhattacharya D, Pathak LC, Mishra SK, Sen D, Chopra KL, Appl. Phys. Lett., 57, 2145 (1990)
Kim YS, M.S. Thesis, Chonbuk national University (1993)
Kim YS, Park JS, Shin HS, Korea Chonbuk National Univ. (Research of Eng.), 24, 149 (1993)
Kim YS, Park JS, Chung BW, Shin HS, Korean J. Chem. Eng., 12(5), 563 (1995)
Ling HC, Yan MF, J. Appl. Phys., 64, 1307 (1988)

[Referenced By]

[1] Chu CW, Hor PH, Meng RL, Gao L, Huang ZJ, Wang YQ, Phys. Rev. Lett., 58, 405 (1987)

[2] Maeda H, Tanaka Y, Fukutomi M, Asano T, Jpn. J. Appl. Phys., 27, L209 (1988)

[3] Sheng ZZ, Hermann AM, Ali AE, Almasan C, Estrada J, Datta T, Matson RJ, Phys. Rev. Lett., 60, 937 (1988)

[4] Eibsch M, Lines ME, Tarascon ZM, Barboux P, Phys. Rev., B, Condens. Matter, 38, 2896 (1988)

[5] Muromachi ET, Uchida Y, Kato K, Jpn. J. Appl. Phys., 26, 2087 (1987)

[6] Eibschiitz M, Lines ME, Reiff WM, vanDover B, Waszczak JV, Zahurak S, Felder RJ, Appl. Phys. Lett., 62, 1827 (1993)

[7] Xiao G, Streitz FH, Gavrin A, Du YW, Chien CL, Phys. Rev., B, Condens. Matter, 35, 8782 (1987)

[8] Muromachi ET, Uchida Y, Kato K, Jpn. J. Appl. Phys., 26, 2087 (1987)

[9] Bhattacharya D, Pathak LC, Mishra SK, Sen D, Chopra KL, Appl. Phys. Lett., 57, 2145 (1990)

[10] Kim YS, M.S. Thesis, Chonbuk national University (1993)

[11] Kim YS, Park JS, Shin HS, Korea Chonbuk National Univ. (Research of Eng.), 24, 149 (1993)

[12] Kim YS, Park JS, Chung BW, Shin HS, Korean J. Chem. Eng., 12(5), 563 (1995)

[13] Ling HC, Yan MF, J. Appl. Phys., 64, 1307 (1988)