Process for making 90 K superconductors from acetate precursor s

Details Process for making 90 K superconductors from acetate precursor s Process for making 90 K superconductors from acetate precursor s

1987-06-09

1989-09-12

Morgenstern, Norman

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

423263, 423593, 423604, 501152, 252521, 264319, 264DIG25, 264DIG36, H01L 3912

Patent

active

048660310

ABSTRACT:
There is disclosed an improved process for preparing a superconducting composition having the formula MBa.sub.2 Cu.sub.3 O.sub.x wherein M is selected from the group consisting of Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu; x is from about 6.5 to about 7.0; said composition having a superconducting transition temperature of about 90 K; said process consisting essentially of preparing a precursor solution, drying the solution of obtain a solid material, and heating and cooling the solid material under specified conditions to obtain the desired product. In another embodiment, a shaped superconducting MBa.sub.2 Cu.sub.3 O.sub.x article is prepared by impregnating an article of cellulose material with the precursor solution, drying the impregnated article, and heating and cooling the impregnated article under prescribed conditions to obtain the desired product.

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