Method for preparing textured potassium niobate sodium-based leadless piezoelectric ceramic

Method for preparing textured potassium niobate sodium-based leadless piezoelectric ceramic

  • CN 101,863,661 A
  • Filed: 06/04/2010
  • Published: 10/20/2010
  • Est. Priority Date: 06/04/2010
  • Status: Active Grant
First Claim
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1. the preparation method of textured potassium niobate sodium-based leadless piezoelectric ceramic is characterized in that, comprises the steps:

  • (1) selects Na for use 2CO 3, K 2CO 3, Li 2CO 3, Nb 2O 5, Ta 2O 5, Sb 2O 3Powder is pressed chemical formula [(K mNa 1-m) 1-xLi x] (Nb 1-y-zTa ySb z) O 33Proportioning obtains matrix powder, and adds that to account for matrix powder total amount mol ratio be that the sintering agent powder of 0.5mol%~

    1mol% obtains mixed powder, m=0.4~

    0.5 wherein, and x, y, z=0~

    0.1, Described sintering agent powder is CuO or ZnO or CdO or K 4CuNb 8O 23Or K 5.4Cu 1.3Ta 10O 29(2) selecting ethyl cellulose, methylcellulose gum or soluble cotton for use is binding agent, selecting Terpineol 350 or ethylene glycol for use is solvent, powder and binding agent and solvent with step (1) gained, the control tackiness agent;

    solvent;

    the mass ratio of powder is 1;

    (12~

    25);

    (5~

    15) add sheet NaNbO then 3Or sheet KNbO 3Template continues to mix acquisition slurry, wherein sheet NaNbO 3Or sheet KNbO 3The mol ratio of shared total Na of Na that template provides or K or K amount is 5%~

    20%;

    (3) slurry with step (2) gained passes through the dry ceramic thick film that obtains thickness at 0.10~

    0.30mm of repeatedly silk screen printing;

    (4) ceramic thick film with step (3) gained is cut into desired size, and multilayer laminated compacting obtains biscuit, behind the biscuit plastic removal, carries out sintering again.

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