采用固相烧结法制备锆钛酸铅95/5(PZT95/5)材料,以“相同化合价,不同原子半径;相近原子半径,不同化合价”的原则,选择了碱金属族、碱土金属族元素的碳酸盐以及Fe2O3、SiO2、Nb2O5、WO3等作为掺杂物分别对其进行掺杂改性.研究了掺杂对材料介电性能、极化性能和低温-高温铁电相的相变温度的影响.发现受主掺杂使得材料的介电常数降低,施主掺杂使得材料的介电常数提高;剩余极化随着掺杂离子的化合价增大而增大;制备得到了低温-高温铁电相相变在15℃的铁电材料,在实际应用上有重要意义.
PZT95/5 samples were prepared with the conventional ceramic process. Based on the principle of “the same valance, different ionic radius; similar ionic radius,
different valances”, the additives such as alkali-metal carbonates, alkali-earth-metal carbonates, Fe2O3, SiO2, Nb2O5 and WO3 were doped into the PZT95/5
separately. The dielectric properties, polarization properties and FRL-FRH phase transition behavior were studied. The acceptor additives make dielectric
constant of the material decrease, and the donor additives demonstrate the opposite effect; The remnant polarization in the material climes up with the increase of
the cationic valances of additives; The pure PZT95/5 ferroelectric material obtained possesses FRL-FRH phase transition temperature at 15℃
, this is significant for its application.
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