低强场损耗PZT基压电陶瓷的制备及性能研究

Preparation and Properties of PZT-based Ceramics with Low Dielectric Loss at High Electric Field

  • 摘要: 本文系统的研究了Nb、Mg、Ce、Al、Yb元素掺杂对二元系大功率压电陶瓷材料Pb0.97 Sr0.03(Zr0.52Ti0.48)O3+0.5 mol%CaFeO5/2相结构、压电性能、介电损耗、强场介电损耗、居里温度等的影响。XRD显示所有陶瓷为纯钙钛矿结构, 不同掺杂元素晶胞参数略有变化, 陶瓷的压电常数、晶粒尺寸、机械品质因数和强场介电损耗则随掺杂元素的不同有较大变化, 在Mg元素掺杂时, 制备的压电陶瓷综合性能最佳, 具体参数如下: Tc=323 ℃, εr=1075, tanδ=0.21%, tanδ=0.33%@400V/mm, kp=0.59, d33=264 pC/N, Qm=1263。

     

    Abstract: Pb0.97Sr0.03(Zr0.52Ti0.48)O3+0.5mol%CaFeO5/2+M piezoelectric ceramic (abbreviated as PZT-CaFe-M) were synthesized by traditional solid-state reaction method, in which M is Nb, Mg, Al, Ce, Yb. The effects of M on phase structure, dielectric, piezoelectric properties, dielectric loss at high electric field, curie temperature of the ceramics were investigated in detail. The X-ray resulted that PZT-CaFe-M ceramics are a pure perovskite structure without any other second phases, but the cell parameters changed slightly with different elements doped. The piezoelectric constant, grain size, mechanical quality factor and dielectric loss at high electric field of the ceramics changed vary greatly with the doping elements. The piezoelectric ceramics with Mg doped exhibited the favorable electrical properties, which were listed as follows: Tc=323 ℃, εr=1075, tanδ=0.21%, tanδ=0.33%@400V/mm, kp=0.59, d33=264 pC/N, Qm=1263.

     

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