Flame synthesis of high Tc superconductors

✍ Scribed by Michael R. Zachariah; Serge Huzarewicz

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 462 KB
• Volume: 87
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(91)90030-f

✦ Synopsis

High-temperature superconducting particles of the 1:2:3 yttrium-barium-copper oxide systems were synthesized in an inverted configuration coannular diffusion flame. The particles were produced from a spray pyrolysis technique, employing aerosolized nitrate salts of Y, Ba, and Cu. The product showed a transition temperature of 92 K as determined from magnetic susceptibility measurements. The particles were shown to have a wide size distribution, ranging from 10 to 1000 nm. Due to the effects of water vapor reactions at high temperatures, only a diffusion flame successfully produced the correct phase.