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Spray drying a ceramic slurry produces

  • A.free-flowing granules suitable for pressing
  • B.a solid dried block that must be crushed again
  • C.a liquid slip that is ready for slip casting
  • D.individual single crystals of very high purity

Answer: A

Atomised droplets dry in a stream of hot air, leaving hollow or dense granules of controlled size. These flow readily into a die and fill it uniformly, which a fine primary powder would never do. Granule size is chosen against the depth and shape of the die.

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