Growth of Nd2O3 buffer layers on Ni tapes by reel-to-reel sol–gel process for YBCO coated conductors

✍ Scribed by Erdal Celik; Yusuf.S. Hascicek

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 187 KB
• Volume: 106
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2003.07.002

✦ Synopsis

In this study, Nd 2 O 3 buffer layers were deposited on textured Ni tapes using a reel-to-reel sol-gel process for YBa 2 Cu 3 O 7-x (YBCO) coated conductors. Depending on processing temperature, phase transformation in Nd 2 O 3 thin films was investigated. An Nd based precursor solution was prepared using solvent, chelating agents and modifying liquid material. The amorphous gel films were dried at 300 • C for 30 s and then heat treated at 500 • C for 2 min in air in the reel-to-reel sol-gel set up with three-zones furnace. The calcined films were annealed at temperature range of 850 and 1150 • C for 10-30 min under two different atmospheres. It was found that cubic phase transformed to hexagonal structure up to 1000 • C. The textured films were grown onto the textured Ni tapes at 1150 • C for 10 min under 4% H 2 -Ar gas flow using modifying triethanol amin. ESEM images of Nd 2 O 3 buffer layer showed crack-free, pinhole-free, dense and smooth microstructure.