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The depolarization performances of 0.97PbZrO-0.03Ba(MgNb)O ceramics under hydrostatic pressure

Applied Physics Letters, ISSN: 0003-6951, Vol: 112, Issue: 6
2018
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Metrics Details

  • Citations
    13
    • Citation Indexes
      13
  • Captures
    2

Article Description

Several 0.97PbZrO-0.03Ba(MgNb)O (0.97PZ-0.03BMN) ceramics were prepared via the columbite precursor method. Their microstructures and pressure-dependent ferroelectric and depolarization performances were then studied. The X-ray diffraction patterns of ground and fresh samples indicate that a main rhombohedral symmetry crystal structure is present in the bulk and that it sits alongside a trace quantity of an orthorhombic antiferroelectric phase that results from the effect of grinding on the surface. The remanent polarization (P) of the 0.97PZ-0.03BMN reached 32.4 μC/cm at 4.5 kV/mm and ambient pressure. In an in situ pressure-induced current measurement, more than 91% of the retained P of the pre-poled sample was released when the pressure was increased from 194 MPa to 238 MPa. That this pressure-driven depolarization should be attributed to the pressure-induced ferroelectric-antiferroelectric phase transition is supported by the emergence of double P-E loops at high hydrostatic pressures. Moreover, the 0.97PZ-0.03BMN ceramics exhibit no temperature-induced phase transitions and little related polarization loss up to 125 °C, which suggests that P has excellent thermal stability. The sharp depolarization behavior at low pressures and excellent temperature stability reveal that our 0.97PZ-0.03BMN ceramics exhibit superior performances in mechanical-electrical energy conversion applications.

Bibliographic Details

Su, Rigu; Nie, Hengchang; Liu, Zhen; Peng, Ping; Cao, Fei; Dong, Xianlin; Wang, Genshui

AIP Publishing

Physics and Astronomy

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