Method for synthesis of high-temperature Hg-Ba-Ca-Cu-O (HBCCO) s

Details Method for synthesis of high-temperature Hg-Ba-Ca-Cu-O (HBCCO) s Method for synthesis of high-temperature Hg-Ba-Ca-Cu-O (HBCCO) s

1993-07-28

1996-11-26

King, Roy V.

Superconductor technology: apparatus, material, process

High temperature , per se

Copper containing

505126, 505776, 505785, 505725, 252518, 252521, 423593, 423604, 423635, C01F 1102

Patent

active

055785514

ABSTRACT:
The present invention is a controlled vapor/solid reaction process for the synthesis of samples of bulk compositions with a structure defined by the homologous series HgBa.sub.2 Ca.sub.n-1 Cu.sub.n O.sub.2n+2+.delta. [Hg-12(n-1)n] with n=2, 3, . . . with up to 75 to 90% Hg-1212 and 65 to 75% Hg-1223 by volume, which display sharp superconducting transitions up to 135 K.

REFERENCES:
patent: 5082825 (1992-01-01), Hermann et al.
patent: 5177055 (1993-01-01), Kinsman et al.
Adachi et al, Appl. Phys. lett. 63(26) Dec. 1993, pp. 3628-3629.
Zeng et al, Appl. Phys. lett. 56(16) Apr. 1990, pp. 1573-1575.
"Superconductivity above 130 K in the Hg-Ba-Ca-Cu-O System," by A. Schilling, M. Cantoni, J. D. Guo & H. R. Ott, Nature, vol. 363, pp. 56-58 (May 6, 1993).
"Superconductivity at 94 K in HgBa.sub.2 CuO.sub.4+.delta. ", by S. N. Putilin, E. V. Antipov, O. Chmaissem and M. Marezio, Nature, vo. 362, pp. 226-228 (Mar. 18, 1993).
"Structure and superconductivity of HgBa.sub.2 CuO.sub.4+.delta.," by J. L. Wagner, P. G. Radaelli, D. G. Hinks, J. D. Jorgensen, J. F. Mitchell, B. Dabrowski, G. S. Knapp and M. A. Beno, Physica, C210 (1993) pp. 447-454.
"Model for the reversible magnetization of high-k tyle-II superconductors: Application to high-T.sub.c superconductors," by Zhidong Hao and John R. Clem, Physical Review B, vol. 43, No. 4, pp. 2844-2852 (Feb. 1, 1991).
"Crystal Structures of High-Temperature Superconductors," by Robert M. Hazen, Properties of High Temperature Superconductors, II, edited by D. M. Ginsberg (World Scientific, Singapore, 1990).
"New Complex Copper Oxides: HbBa.sub.2 RCu.sub.2 O.sub.7 (R=La, Nd, Eu, Gd, Dy, Y)," by S. N. Putilin, I. Bryntse, E. V. Antipov, Mat. Res. Bull., vol. 26, pp. 1299-1307 (1991).

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