Phase transition and dielectric properties of La-doped Pb(Zr,Sn,Ti)O3 antiferroelectric ceramics under hydrostatic pressure and temperature

Phase transition and dielectric properties of La-doped Pb(Zr,Sn,Ti)O-3 antiferroelectric ceramics under hydrostatic pressure and temperature have been studied, and effects of temperature on the pressure-induced phase transition and the dielectric property dependence on the applied hydrostatic pressure have been investigated. It has been found from experimental results that the ferroelectric-antiferroelectric phase transition pressure is decreased with increasing temperature, and that when applying hydrostatic pressure the ferroelectric-antiferroelectric phase transition temperature is decreased and antiferroelectric-paraelectric phase transition temperature is increased. All these observed phenomena are very useful and informative for deep understanding of the behaviors of temperature and pressure-induced dielectric frequency dispersion and diffuse phase transition. (C) 2002 American Institute of Physics.