Oxide superconducting material and process for preparing the sam

Details Oxide superconducting material and process for preparing the sam Oxide superconducting material and process for preparing the sam

1994-02-02

1996-06-25

Lieberman, Paul

Superconductor technology: apparatus, material, process

High temperature , per se

Thallium containing

252518, 252521, 505121, 505782, 505783, 505784, H01B 1200, H01L 3912

Patent

active

055299792

ABSTRACT:
Superconducting oxide material containing compound represented by the formula:

REFERENCES:
patent: 4870052 (1989-09-01), Engler et al.
patent: 4880771 (1989-11-01), Cava et al.
patent: 4894361 (1990-01-01), Subramanian
patent: 4962083 (1990-10-01), Hermann
patent: 4988668 (1991-01-01), Engler et al.
patent: 5019553 (1991-05-01), Akimitsu et al.
patent: 5264414 (1993-11-01), Subramanian
Physica C v. 157 Cover Sheet only (Mar. 1, 1989).
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Morosin "Crystal Structure of Tl Ca.sub.2 Ba.sub.2 Cu.sub.3 O.sub.9 " Physica C v. 156 Nov. 1988 pp. 587-591.
Sulpice "Bulk Superconductivity in Tl.sub.2 Ba.sub.2 Ca Cu.sub.7 O.sub.8 and . . . " Physica C v. 156 Sep. 1988 pp. 243-248.
"New 120K Tl-Ca-Ba-Cu-O Superconductor"--Z. Z. Sheng; W. Kiehi; J. Bennett; A. El Ali; D. Marsh; G. D. Mooney; F. Arammash; J. Smith; D. Viar; and A. M. Herman, Mar. 30, 1988 (Dept. of Physics, University of Arkansas).
"A New High-T.sub.c Oxide Superconductor Without a Rare Earth Element" Hiroshi Maeda; Yoshiaki Tanaka; Masao Fukutomi; Toshihisa Asano, Jan. 23, 1988, National Research Institute for Metals, Tsukuba Laboratories.
"Bulk Superconductivity at 122 K in Tl(Ba, Ca).sub.2 Ca.sub.3 Cu.sub.4 O.sub.10.5+8 with Four Consecutive Copper Layers", P. Haldar, K. Chen, B. Maheswaran, A. Roig-Janicki, N. K. Jaggi, R. S. Markiewicz, B. C. Giessen--Science vol. 241--Sep. 2, 1988.
"Bulk Superconductivity up to 122 K in the Tl-Pb-Sr-Ca-Cu-O System" M. A. Subramanian, C. C. Torardi, J. Gopalakrishnan, P. L. Gai, J. C. Calabrese, T. R. Askew, R. B. Flippen, A. W. Sleight, Report 249 Science, vol. 242, No. 4876, Oct. 14, 1988.
"Possible High T.sub.c Superconductivity in the Ba-La-Cu-O System", J. G. Bednorz and K. A. Muller, IBM Zurich Research Laboratory, Ruschukon, Switzerland, Apr. 17, 1986.
"Structures of the Superconducting Oxides Tl.sub.2 Ba.sub.2 CuO.sub.6 and Bi.sub.2 Sr.sub.2 CuO.sub.6 ", Torardi et al, Phys. Rev. B, vol. 38, No. 1, Jul. 1, 1988, pp. 225-231.
"New Class of Superconductors Pushing Temperatures Higher", Dagani, Chem. & Eng. News, May 16, 1988, pp. 24-29.
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"A New Intermediate-T Oxide Superconductor With A Double Perovskite Structure: The 1-2-1 Phase (Tl, Bi), (Sr, Ca).sub.2 Cu.sub.1 O.sub.4,5,&6 ", P. Haldar et al, Dept. of Chemistry and Barnett Institute of Chemical Analysis & Materials Science, Northeastern Univ. Boston, Massachusetts, Materials Letters, vol. 7, No. 1.2, Aug. 1988.
"A New High-Tc Superconductor Containing Thallium and Its Crystal Structure: The 1212 Phase (Tl.sub.1-x Bix) 1.33 Sr 1.33Cal.33 Cu.sub.2 O.sub.6.67+.delta.," by P. Haldar et al, Journal of Superconductivity, vol. 1, No. 2, 1988 pp. 211-218 (no month provided).
"Superconductivity of Tl.sub.1.5 SrCaCu.sub.2 O.sub.x ", Nagashima et al, Japanese Journal of Applied Physics, vol. 27, No. 6, Jun. 1988, pp. L1077-L1079.
"TI.sub.1-x Pb.sub.x CaSr.sub.2 Cu.sub.2 O.sub.7 : Another 1122 High-Tc Superconductor", A. K. Ganguli et al, Physica C Superconductivity, vol. 156 (1988) No. 5, Dec. 1, 1988, pp. 788-790.
"Superconductive Transition at 120K in a Tl-Bi-Sr-Ca-Cu-O System," Jul. 1989, pp. L1167-L1170, Japanese Jr. Appl. Phy. vol. 28, No. 7
"Preparation and Superconducting Properties of (Tl, Bi)Sr.sub.2 CaCu.sub.2 O.sub.y," 1989, Physica C 157, pp. 365-369 Mar.

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