Key:

• Sample #: chronological order
• Crucible Type: Alumina crucible or Coors ceramic crucible used in the intitial reaction.
• Grindings: Number of times the powder was ground before final sintering. One grinding indicates only an initial mixing and grinding of the reactants. Two grindings indicates the same initial grinding plus one more grinding between initial calcination and pellet sintering.
• Plate Type: Type of plate the pellet was sintered on in the furnace. Alumina plate and ceramic tiles were used.
• Meissner Effect:
  • Negative: magnet did not leviate
  • Low: magnet does not completely leviate; stiil supported by pellet
  • Medium: magnent leviates at a height equal to or less than the diameter of the magnet
  • High: magnet leviatates at a height greater than the diameter of the magnet
• CuO Grade: 97.0% or 99.7% metals basis CuO
• Stability:

• Good - may be warped slightly when warmed to room temperature from 77K.
• Broken - damaged upon sintering or cracked when roomed to room temperature from 77K.