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Method of producing alumina particles

  • US 6,335,052 B1
  • Filed: 01/19/2000
  • Issued: 01/01/2002
  • Est. Priority Date: 01/20/1999
  • Status: Expired due to Fees
First Claim
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1. A method of producing alumina particles, comprising the steps of:

  • preparing a mixture of;

    (A) core particles, which are formed from a material used as nuclei of said alumina particles, wherein said core particles have a particle size in a range of from 1 μ

    m inclusive to 2000 μ

    m exclusive, and (B) slurry which contains fine alumina powder;

    drying the resulting mixture by removing water from said mixture; and

    baking the resulting dried mixture at a temperature in a range of from 1200°

    C. to 1500°

    C. to thereby sinter alumina on surfaces of said core particles, wherein at least a portion of said core particles remain as said nuclei of said alumina particles at the end of said baking.

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