The (Pb0.70Ba0.26Sr0.04)(Zr0.52 Ti0.48)O3(PBSZT)piezo ceramics were prepared by the roll formation and solid-state reaction process. The microstructure and phase compositions of the ceramics were investigated by scanning electron microscopy and X-ray diffraction. The relationships between dielectric properties (CT, tanδ) and electric field strength,electromechanical coupling coefficient and bias field strength were investigated. The results show that the CT and tanδ increases gradually then reduces dramatically with enhancing electric field strength, In the bias field, the CT decreases with enhancing the positive bias field strength, while increases with enhancing the negative bias field strength, and tanδ rises both in the positive bias field and the negative bias field, the Kp increases with enhancing the positive bias field strength while varies to same trend with reducing the negative bias field strength. The conclusions instruct that it is important to avoid the high loss point, and it is good for restraining attenuation of the piezo capability while providing a positive bias field on piezo ceramics applications. bystolic copay card bystolic coupon voucher
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