Thin BSCCO films prepared by deposition from aerosol

Abstract

Thin BSCCO 2212 films were prepared by deposition of aerosol generated by a pneumatic nebulizer from stoichiometric aqueous nitrate solutions. A two-step procedure was used: first deposition onto MgO substrate at about 150 degrees C, then firing at T>800 degrees C, both at atmospheric pressure. Detailed TG, DTG and DTA studies of individual constituents as well as their homogenized mixtures have shown, however, that the thermal decomposition of nitrates deposited on a substrate as a precursor film starts only at temperatures higher than 150 to 200 degrees C, and it is completed only during the final annealing step at T>800 degrees C. Principles of the aerosol deposition and thermal decomposition of individual constituents and their stoichiometric mixture are discussed and the use of ultrasonic aerosol generation is suggested.