A位取代对PZN-PNN-PZT压电陶瓷性能的影响

Influence of ASite Com-replacing on Properties of PZN-PNN-PZT Piezoelectric Ceramic

以固态氧化物为原料,采用固态合成工艺制备Pb(Zn1/3Nb2/3)O3-Pb(Ni1/3Nb2/3)O3-Pb(ZrTi)O3(PZN-PNN-PZT)压电陶瓷,并研究了锆钛比(r(Zr)/r(Ti))、Ba2+的A位取代及Ba2+、La3+的A位复合取代对压电陶瓷电性能的影响。结果表明,PZN-PNN-PZT压电陶瓷在r(Zr)/r(Ti)=1.03下,进行Ba2+,La3+的A位复合取代后,即式子在Pb0.92Ba0.04La0.04(Ni1/3Nb2/3)y(Zn1/3Nb2/3)z Zrm Tin O3时压电性能最佳,其介电常数εT33/ε0=5 657,压电常数d33=709pC/N,机电耦合系数kp=0.69,品质因数Qm=45,居里温度TC=180.9℃。

The lead zincate niobate （PZN）-lead nickelate（PNN）-lead zirconnate titanate（PZT） piezoelectric ceramics were prepared by solid-synthesis process with the solid oxides as raw materials.The influences of r（Zr）/r（Ti） ratio,A-site replacing Pb with Ba2＋ and com-replacing Pb with Ba2＋ and La3＋ were investigated.The results have shown that the piezoelectric properties are optimal （that is,the formula is Pb0.92 Ba0.04 La0.04 （Ni1/3Nb2/3）y （Zn1/3 Nb2/3）zZrmTinO3）.The dielectric constantε3T3/ε0 is 5 657,piezoelectric constant d33 is 709 pC/N,electromechanical coupling coefficient kp is 0.69,Q factor Qm is 45,and the Curie temperature Tc is 180.9 ℃.