Fabrication of High-Tc Superconducting Coatings by Electrostatic Fluidized-Bed Deposition

  • David W. Kraft
  • Kenneth S. Gottschalck
  • Bedrich Hajek


We report the fabrication of high-Tc superconducting coatings by a novel technology, electrostatic fluidized-bed deposition. Fluidized powders of the YBa2Cu3O7−x superconductor were charged and deposited electrostatically on substrates of copper, alumina and stainless steel, and subjected to various sintering treatments. Substrate geometries included rectangular and cylindrical shapes. The superconducting transition was observed by both electrical and magnetic means; an AC four-probe technique was used to measure electrical resistance, and inductance measurements were made on copper coils wound on the cylindrical specimens. The effects of powder particle size, substrate preparation, sintering time and sintering temperature were studied. The advantages of this deposition process over thermal spray processes are described, and means to improve densification and critical-current density are discussed. An application to magnetic shielding is presented.


Powder Particle Copper Block Thermal Spray Process Powder Particle Size Inductance Measurement 


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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • David W. Kraft
    • 1
  • Kenneth S. Gottschalck
    • 1
  • Bedrich Hajek
    • 2
  1. 1.University of BridgeportBridgeportUSA
  2. 2.SL Electrostatic Technology, Inc.New HavenUSA

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