The temperature dependence of permittivity and remanent polarisation in monocrystalline and ceramic PbZrO 3 and the temperatures of the phase transitions between ferro-, antiferro- and paraelectric phases are influenced by applied field and hydrostatic pressure. A constant electric field broadens the ferroelectric phase range. Under the influence of hydrostatic pressure the ferroelectric phase occurs only at pressures less than 26 MPa for monocrystals and 40 MPa for ceramics. Results obtained confirm Samara's hypothesis of the existence of two soft modes in PbZrO 3 , i.e. ferroelectric and antiferroelectric.
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Hańderek et al. (1981) studied this question.
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