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Coprecipitation as a powder synthesis route involves

  • A.firing a mixture of oxides at a high temperature
  • B.precipitating the components together from a solution
  • C.grinding two separate oxides together in a ball mill
  • D.melting the raw materials and then quenching them rapidly

Answer: B

Mixing at the level of the solution gives a far more intimate combination than any mechanical mixing can, so the calcination that follows is quicker and more complete. Controlling the pH and the sequence of addition is the difficulty.

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