surface modified particle diameter mixed silver powder and preparation method thereof

surface modified particle diameter mixed silver powder and preparation method thereof

  • CN 102,407,341 A
  • Filed: 10/27/2011
  • Published: 04/11/2012
  • Est. Priority Date: 10/27/2011
  • Status: Active Grant
First Claim
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1. the preparation method of a surface modification particle diameter mixing silver powder is characterized in that comprising following operation:

  • (1) configuration respectively;

    0.3-3.0mol/L silver nitrate aqueous solution;

    The aqueous solution that contains the PH conditioning agent;

    The alcoholic solution that contains surface modifier;

    The aqueous solution that contains reducing agent;

    Each solution cooperation order of this step in no particular order;

    (2) silver nitrate aqueous solution that step (1) is disposed, contain the aqueous solution of PH conditioning agent and contain surface modifier alcoholic solution and stream join in the aqueous solution that contains reducing agent;

    The surface modifier consumption is the 0.1-5.0% of silver-colored weight in the mixed reactant liquor;

    Has the agitated reactor internal reaction 20-100min of high-shear mixer;

    The control reaction temperature is at 20-50 ℃

    , and a step precipitate reduction silver powder is made surface modification treatment to the silver powder of precipitate reduction synchronously;

    (3) then with the silver powder of surface modification treatment through Separation of Solid and Liquid, pure water washing, dry, crush and screen, obtain surface modification particle diameter mixing silver powder finished product.

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