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 : 21 Mar 1990

Pagination or Media Count : 25

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 BiaSrbCacCudOx(BSCCO) 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