``1223'' Tl-Ca-Ba-Cu-oxide thick films prepared by a silver-addition process
Abstract
Progress is reported in the understanding and development of the silver-addition process for the preparation of ``1223''-TCBCO thick films. Described are improvements in film homogeneity achieved via modification of the spray deposition procedure, increases in Jc achieved via post synthesis heat treatment in oxygen, and the results of studies of the film growth mechanism which indicate that presence of silver, barium oxide, and thallium oxide are all necessary for the development of a liquid phase responsible for the accelerated film formation obtained by this technique. Also reported are studies of the preparation of films on metallic substrates which include Jc vs Field data at 4.2 K and 77 K for ``1223'' film on silver foil exhibiting Tc(0)=105 K and Jc(zf-77 K)=10,000 A/cm2.
- Publication:
-
Superconductivity and its Applications
- Pub Date:
- February 1992
- DOI:
- 10.1063/1.43601
- Bibcode:
- 1992AIPC..273..531D
- Keywords:
-
- 74.70.Vy;
- 74.75.+t;
- 85.25.-j;
- Superconducting devices