Accession Number:

ADD014522

Title:

Aligned Bismuth, Strontium, Calcium Cuprate Coatings on Polycrystalline Substrates.

Descriptive Note:

Patent Application, Filed 21 Mar 90,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

• Toth, L.
• Spann, J. R.

Report Date:

1990-03-21

Pagination or Media Count:

25.0

Abstract:

The present invention relates in general to a process for forming thick film superconducting coatings on a polycrystalline substrate and, more particularly, to a process for forming a thick film of BiaSrbCacCudOxBSCCO on a polycrystalline substrate. A process is provided for forming an oriented thick film superconducting coating on a polycrystalline substrate, the coating comprising at least two highly oriented components. The process is a powdered mixture prepared from Bi2O3, SrCO3, CaCO3, and CuO onto a polycrystalline substrate rapidly heating the resultant coated substrate to a temperature of from about 1000-1100 C for a period of from about 5-30 minutes, thereby melting the powder and forming a thick film coating rapidly quenching the coated substrate to below 500 C, which is below the temperature at which phase transition occurs. Patent applications. jes

Descriptors:

• *PHASE TRANSFORMATIONS
• BISMUTH
• COATINGS
• MIXTURES
• PATENT APPLICATIONS
• POLYCRYSTALLINE
• POWDER METALS
• QUENCHING
• STRONTIUM
• SUBSTRATES
• THICK FILMS

Subject Categories:

• Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE