Process for the Production of low TC superconductor molded bodie

Details Process for the Production of low TC superconductor molded bodie Process for the Production of low TC superconductor molded bodie

1999-01-19

2000-05-23

Kopec, Mark

Compositions

Electrically conductive or emissive compositions

Metal compound containing

2525214, 2525215, 505951B, 505805, 420901, H01B 102

Patent

active

060662700

ABSTRACT:
The production of compact molded bodies of rare-earth transition-metal boron carbide and boron nitride compounds configured so as to avoid a selective evaporation of individual components in the production process and enable an exact adjustment of the desired stoichiometry. The process is characterized in that

REFERENCES:
patent: 5470530 (1995-11-01), Cava et al.
Lee et al. "Electronic structure of nu-based superconducting quaternary counds YNi.sub.2 B.sub.2 X (X=B,C,N,and O)" Physical Review B, vol. 50, No. 6 pp. 4030-4033, Aug. 1994.
R. J. Cava, et al, Superconductivity in lanthanum nickel boro-nitride, Letters to Nature, vol. 372, Nov. 17, 1994.
Q. W. Yan, Superconductivity in the quaternary compounds LNi.sub.4 B.sup.4 C with L=Y, Ho, Er, and Tm Physical Review B, vol. 51, No. 13, Apr. 1, 1995.
R. Nagarajan, et al, Bulk Superconductivity at an Elevated Temperature (T.sub.c .apprxeq.12K) in a Nickel Containing Alloy System Y-NI-B-C.
Physical Review Letters, vol. 72, No. 2, Jan. 10, 1994.
C. Godart, et al; Some Chemical and Physical Properties of Quaternary Borocarbides J. of Solid State Chemistry 133, 169-177 (1997).
M. Buchgeister, et al; Preparation an phase analysis of YNi.sub.2 B.sub.2 C, Materials Letters 22 (1995), p. 203-207.
T. E. Grigereit, et al; Observation of Oscillatory magnetic Order in the Antiferromagnetic Superconductor HoNi.sub.2 B.sub.2 C Physical Review Letters, vol. 73, No. 20, Nov. 14, 1994.
Y.Y. Sun, et al; The 23 K superconducting phase YPd.sub.2 B.sub.2 C; Physica C 230 (1994) 435-442.
Strom, et al; Superconducting Rapid Quenched YNi.sub.2 B.sub.2 C Ribbon; Physica C 235-240 (1994), 2537-2538.
L. Schultz, et al; Mechanically Alloyed Glassy Metals Topics in Applied Physics, vol.72, (1994).
H. Koshiba, et al, Nanocystallization and Magnetic Properties of Fe.sub.56 Co.sub.7 Ni.sub.7 Zr.sub.2 M.sub.8 B.sub.20 (M=Nb or Ta) Glassy Alloys Nanostructured Materials, vol. 8, No. 8, pp. 997-1005, 1997.
Shunichi Arisawa, et al; Synthesis of YNi.sub.2 B.sub.2 C Thin Films by Magnetron Sputtering Appl. Phys. Lett. 65, Sep. 5, 1994.
H. W. Zandbergen, et al; Structure of the 13-K superconductor La.sub.3 Ni.sub.2 N.sub.3 and the related phase LaNiBN; Nature, vol. 372, Dec. 29, 1994.
Michor; Superconducting properties of La.sub.3 Ni.sub.2 B.sub.2 N.sub.3 -.delta. Physical Review B, vol. 54, No. 13, Oct. 1, 1996.

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