FABRICATION AND PROPERTIES OF TEXTURED YBA2CU3O7 THICK-FILMS ON POLYCRYSTALLINE AG0.9PD0.1 AND SILVER SUBSTRATES

Highly textured (c axis perpendicular to the plane of the substrate ta pe) thick films of YBa2Cu3O7 grown on Ag0.9Pd0.1 and pure silver subst rates have been made by a traveling heated zone method. The speed of t he traveling zone can be as fast as approximately 5 cm/h and the tempe ratures of the zone, 930-975-degrees-C, were well below the peritectic temperature of YBa2Cu3O7. A precursor layer, which consisted of a nit rate solution of yttrium, barium, and copper cations, was deposited by spray pyrolysis directly onto a heated substrate. The values of the r esistively measured T(c) were 83-91 K. The transport critical current density of these thick films was in the range of 2-8 X 10(3) A/cm2 at 77 K and 0 T.