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Method for preparation of sintered body of rare earth oxide

  • US 20010027159A1
  • Filed: 02/15/2001
  • Published: 10/04/2001
  • Est. Priority Date: 03/07/2000
  • Status: Active Grant
First Claim
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1. A method for the preparation of a sintered body of a rare earth oxide which comprises the steps of:

  • (a) shaping a powder of the rare earth oxide, of which the D50 value of the particle diameter distribution does not exceed 2.0 μ

    m, the D90 value of the particle diameter distribution does not exceed 3.0 μ

    m and the specific surface area is in the range from 5 to 20 m2/g, into a powder compact; and

    (b) subjecting the powder compact to a heat treatment for sintering at a sintering temperature of 1000°

    C. or higher for at least 1 hour, in which the rate of temperature elevation in the range from 500°

    C. to the sintering temperature does not exceed 500°

    C. per hour and the rate of temperature decrease from the sintering temperature does not exceed 600°

    C. per hour.

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