Abstract: The DC bias field dependence characteristics of the PMN-PZN-PT relaxor ferroelectric ceramics were investigated. The experiments revealed that the DC bias field reduces the dielectric constant, increases the temperature of dielectric maximum, and supresses the frequency dispersion.Based on the concept of u frozen dipole" and " slow dipole ", These results were discussed.

Key words: DC bias, lead magnesium zinc niobate ceramics, frozen dipole, slow dipole