Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1987-11-16
1990-02-13
Stoll, Robert L.
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
423211, 423263, 505 1, 252500, 252518, 252821, 501152, C01F 1700
Patent
active
049005367
ABSTRACT:
This is a process for making precursors for ceramic superconductor. It utilizes fluidized bed chlorination of a rare earth ore (e.g. xenotime or monazite) a separation of yttrium chloride by differential condensation at 725.degree.-1200.degree. C. and reaction with an alkali metal alkoxide to produce yttrium alkoxide for mixing with alkoxide of other non-oxygen constituents of the superconductor for producing an alkoxide composite for processing into the superconductor.
REFERENCES:
patent: 3757412 (1983-09-01), Mnzdiyasni et al.
patent: 3847583 (1974-11-01), Dislich et al.
patent: 3895097 (1981-01-01), Langenhoff
patent: 3925062 (1975-12-01), Trombe et al.
patent: 4244935 (1981-01-01), Dell
patent: 4266978 (1981-05-01), Prochazka
patent: 4411959 (1983-10-01), Braginski
patent: 4419125 (1983-12-01), Charles
patent: 4472510 (1984-09-01), January
patent: 4485094 (1984-11-01), Pebler et al.
patent: 4507254 (1985-03-01), Ozaki
patent: 4543341 (1985-09-01), Barringer et al.
patent: 4575927 (1986-03-01), Braginski
patent: 4584280 (1986-04-01), Nanao et al.
patent: 4588575 (1986-05-01), David
patent: 4636248 (1987-01-01), Ogata et al.
patent: 4636378 (1987-01-01), Pastor et al.
patent: 4650652 (1987-03-01), Naitou
patent: 4670573 (1975-07-01), Greco
patent: 4696810 (1987-09-01), Shirasaki et al.
patent: 4704299 (1987-11-01), Wielonski et al.
patent: 4713233 (1987-12-01), Marsh et al.
patent: 4764357 (1988-08-01), Sherif
Ku et al. "Superconductivity and Phase Stability in the Heavy Rare Earth Quaternary Compounds RBa.sub.2 Cu.sub.3 O.sub.7 (R=Ho, Er, Tm, Yb, Lu)" in the Symposium of the MRS spring meeting, 1987.
Yoshizaki et al. "Superconducting Properties of La.sub.1.85 Sr.sub.0.15 CuO.sub.4 Made by Hot Press and Sintered Methods".
Christen et al. "Correlations Among Thermal Processing, Superconducting Properties and Microstructure in La.sub.1.85 Sr.sub.0.15 CuO.sub.4 ".
Willis et al., letter to the editor entitled "Superconductivity Above 90.degree. K. in Magnetic Rare Earth-Barium-Copper Oxides" (Journal of Magnetism and Magnetic Materials 67, 1987, North Holland, Amsterdam).
Shamoto et al. Japanese Journal of Applied Physics, Apr., 1987, "Effect of Vacuum Annealing on the Superconducting Transition Temperature of La-Sr-Su-O System".
Uwe et al. May, 1987 Japanese Journal of Applied Physics "Affect of Hetero-Valiant Ion Doping in the High T.sub.C Y-Ba-Cu-O superconductor".
Kasowski et al. paper received Mar. 25, 1987 entitled "Electronic Structure of Pure and Doped Orthorombic La.sub.2 CuO.sub.4 ".
Cooke et al. "Thermally Stimulated Luminescence from Rare Earth Doped Barium Copper Oxides".
Bradley et al, Metal Alkoxides, Academie Press NY NY 1978, pp. 10-41, 335-338.
Dynamit Nobel Chemicals, Metal Alkoxides for Sol Gel Applications, Rockleigh N.J. undated.
Kramer et al. Preparation of Thin Film YBa.sub.2 Cu.sub.3 O.sub.6+X ceramic Superconductors via the Sol Gel Process, Material Research Society Symp. Proc. vol. 99, p. 323, Nov. 30-Dec. 4, 1987.
Brahme et al, Spectroscopic Study of High T.sub.c Super Conductors Derived by Solid State & Sol Gel Route, High-Temperature Superconductors II Apr. 5-9, 1988, pp, 289-291.
Zhewg et al, Superconducting YBa.sub.2 Cu.sub.3 O.sub.7-x Fibers Prepared by the Sol-Gel Process High Temperature Superconductors II Apr. 5-9, 1988 pp. 93-96.
Kramer et al High T.sub.c Superconducting Films & Powders Derived From The Sol-Gel Process, High Temperature Superconductors II, Material Res Soc Apr. 5-9-88 pp. 67-68.
Wu et al, Synthesis Study of Superconducting YBaCu.sub.3 O.sub.7-x powders from metal-alkoxides High Temper superconductors, materials Res Soc Nov. 30-Dec. 87 pp. 395-397.
Kramer et al, Highly orientated superconducting thin films derived from the Sol Gel Process, Applied phys Lett 53(2) 11 Jul. 88, pp. 156-158.
Snyder Thomas S.
Stoltz Richard A.
Stoll Robert L.
Stoltz R. A.
Westinghouse Electric Corp.
LandOfFree
Preparation of precursors for yttrium-containing ceramic superco does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Preparation of precursors for yttrium-containing ceramic superco, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of precursors for yttrium-containing ceramic superco will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1166602