DyBa2SnO5.5 a new ceramic substrate for superconducting YBCO (Tc(o) = 92 K) and Bi(2223) (Tc(o) = 110 K) thick films

✍ Scribed by J. Koshy; K.S. Kumar; J. Kurian; Y.P. Yadava; A.D. Damodaran

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 504 KB
• Volume: 234
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)90565-7

✦ Synopsis

A new ceramic material, DyBa2SnOs.5, has been synthesised and sintered as single-phase material for its use as a substrate for both YBCO and BiSCCO superconductors, for the first time. DyBa2SnOs.5 has a complex cubic perovskite (A2BB'O6) structure with the lattice constant a=8.520 A. The dielectric constant and loss factor of DyBa2SnOs.5 are in a range suitable for its use as substrate for microwave applications. YBCO and Bi(2223) superconductors did not show any detectable chemical reactivity (within the precision of the X-ray diffraction technique) with DyBa2SnOs.5 even under severe heat treatment. The thick fdm of YBCO screen printed on polycrystalline DyBa2SnOs.5 substrate gave a Tc¢o) of 92 K and a critical current density (Jc) of 3× 104 A/cm 2 at 77 K. A screen-printed Bi (2223) thick film on a DyBa2SnOs.s substrate gave a Tc¢o) = 110 K and current density 5 × 103 A/cm 2 at 77 K.