Coated powder and process for the preparation thereof

Coated powder and process for the preparation thereof

  • CN 100,444,992 C
  • Filed: 10/28/1998
  • Issued: 12/24/2008
  • Est. Priority Date: 10/30/1997
  • Status: Active Grant
First Claim
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1. a film coats the manufacture method of coccoid, it is characterized in that, this coccoid contains the matrix particle, wherein on this matrix particle, have metal hydroxides film or metal oxide film, this method comprises the raw-material metal salt solution as film joined to have certain pH value and be dispersed with in the water system cushioning liquid of matrix particle, and make slaine and water system cushioning liquid react, on the matrix particle surface, to form one deck aforementioned films at least.

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