Preparation of superconducting oxide precursor materials by pyro

Details Preparation of superconducting oxide precursor materials by pyro Preparation of superconducting oxide precursor materials by pyro

1990-12-14

1992-11-10

Lieberman, Paul

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505737, 505815, 505738, 252518, C01F 1700, H01L 3912

Patent

active

051622998

ABSTRACT:
A superconducting oxide precursor material is prepared by dissolving soluble compounds containing the non-oxygen elements of the oxide in concentrated nitric acid, in which a decomposing agent for the nitrate of the nitric acid selected from urea and sucrose and an oxidizing/reducing agent selected from hydrogen peroxide and ammonium nitrate have also been dissolved. The acid solution is concentrated by heating until the liquid component is pyrolyzed, leaving a superconducting oxide precursor material residue. The precursor material is produced with a relatively high oxidation state, but is normally further oxidized to reach a superconducting state.

REFERENCES:
patent: 4895832 (1990-01-01), Chang et al.
patent: 4959347 (1990-09-01), Kobayashi et al.
patent: 4996189 (1991-02-01), Kourtakis et al.
patent: 5001107 (1991-03-01), Bunker et al.
Rambabu, "An Efficient Combustion Process for Synthesis of YBa.sub.2 Cu.sub.3 O.sub.7 ", J.J.A.P. vol. 29, No. 3, Mar. 1990, pp. 507-508.
Varma et al., "Metal-Nitrate-Urea Decomposition Route for Y-Ba-Cu-O Powder", J. Am. Cer. Soc. 73(10), 3103-3105, Oct. 1990.
Liu et al., "Homogeneous Coprecipitation As a Means Toward High-Te and Sharp-Transition YBa.sub.2 Cu.sub.3 O.sub.7-x Sup. Oxides", Inorg. Chem. 28(1), Jan. 1989.
Keller et al, "Superconductivity in YBa.sub.2 Cu.sub.3 O.sub.x for x Greater Than 7.0", Chem. High Temp. Sup., Sep. 1987.

Affiliated with

Also associated with

Rating

Preparation of superconducting oxide precursor materials by pyro 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 superconducting oxide precursor materials by pyro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of superconducting oxide precursor materials by pyro will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2292647