Carbonate-free inorganic nitrates or oxides and process thereof

Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k

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505725, 505734, 505737, 505780, 252521, 423593, 501123, H01L 3912

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active

051225050

ABSTRACT:
The present invention relates to an improved process to produce an essentially carbon-free nitrate of an alkali metal, alkaline earth metal, transition metal, lanthanide metal, actinide metal, metal, or mixtures thereof, which process comprises:

REFERENCES:
patent: 4975415 (1990-12-01), Gusman et al.
patent: 4994436 (1991-02-01), Giacobbe
Leary et al., "The Use of Nitrogen Dioxide to Improve the Superconductive Properties of YBa.sub.2 Cu.sub.3 O.sub.7," JACS, 73(4), pp. 904-908 (1990).
P. Barboux et al., "The Preparation of Bulk and Thick Films of YBa.sub.2 Cu.sub.3 O.sub.1-7 Using a Solution Technique", Materials Research Society Fall Meeting, Boston, 1987.
P. H. Dickinson, et al., "Chemical vapor disposition of YBa.sub.2 Cu.sub.3 O.sub.1-7 superconducting films," J. Appl. Phys. 66(1) 1 Jul. 1989.
A. M. Kini et al., High-T.sub.c Superconductors: Selective Preparation and Characterization of Tetragonal and Orthorhombic (93 K Superconductor) Phases of YBa.sub.2 Cu.sub.3 O.sub.1-7, Inorgan. Chem. 1987 26, 1834-1836.
T. T. Kodas et al., "Aerosol flow reactor production of fine Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7 powder: Fabrication of Superconducting ceramics," Appl. Phys. Lett, 52(19), p. 1622, 9 May 1988.
M. K. Wu et al., "Superconductivity of 93 K in a New Mixed-Phase Y--Ba--Cu--O Compound System at Amb. Pressure" Physical Review Lettrers, vol. 58, No. 9.

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